harini

backend/main.py

@@ -7,7 +7,7 @@ from mongo_service import MongoService
 from web3_service import Web3Service
 
 # Import all route blueprints
-from routes import auth, test_flow, certificate, dashboard
+from routes import auth, test_flow, certificate, dashboard , courses, quizzes
 
 load_dotenv()
 
@@ -34,6 +34,8 @@ app.register_blueprint(auth.bp, url_prefix='/api/auth')
 app.register_blueprint(test_flow.bp, url_prefix='/api/test')
 app.register_blueprint(certificate.bp, url_prefix='/api/certificate')
 app.register_blueprint(dashboard.bp, url_prefix='/api/dashboard')
+app.register_blueprint(courses.bp, url_prefix='/api/courses')
+app.register_blueprint(quizzes.bp, url_prefix='/api/quizzes')
 
 @app.route('/')
 def health_check():

backend/models/user.py

@@ -0,0 +1,30 @@
+from bson import ObjectId
+from datetime import datetime
+from pymongo.collection import Collection
+
+class UserModel:
+    def __init__(self, collection: Collection):
+        self.collection = collection
+    
+    async def get_by_wallet(self, wallet_address: str):
+        return await self.collection.find_one({"wallet_address": wallet_address.lower()})
+
+    async def create_user(self, wallet_address: str):
+        now = datetime.utcnow()
+        user = {
+            "wallet_address": wallet_address.lower(),
+            "created_at": now,
+            "last_login": now,
+            "total_tests": 0,
+            "certificates": []
+        }
+        result = await self.collection.insert_one(user)
+        user["_id"] = result.inserted_id
+        return user
+    
+    async def update_last_login(self, wallet_address: str):
+        now = datetime.utcnow()
+        await self.collection.update_one(
+            {"wallet_address": wallet_address.lower()},
+            {"$set": {"last_login": now}}
+        )

backend/mongo_service.py

@@ -3,8 +3,10 @@ from pymongo.errors import ServerSelectionTimeoutError
 from datetime import datetime, timedelta
 from typing import Dict, List, Optional, Any
 
+
 class MongoService:
     def __init__(self, uri: str):
+        self.uri = uri  # Store URI for sync operations
         try:
             # Simple connection without custom SSL context
             self.client = AsyncIOMotorClient(
@@ -18,16 +20,15 @@ class MongoService:
             print(f"MongoDB connection failed: {e}")
             # Fallback to basic connection
             self.client = AsyncIOMotorClient(uri)
-            
-        self.db = self.client.openlearnx
         
+        self.db = self.client.openlearnx
         # Collections
         self.users = self.db.users
         self.questions = self.db.questions
         self.test_sessions = self.db.test_sessions
         self.certificates = self.db.certificates
         self.peer_reviews = self.db.peer_reviews
-    
+
     async def init_db(self):
         """Initialize database with indexes and sample data"""
         try:
@@ -38,13 +39,10 @@ class MongoService:
             # Create indexes
             await self.users.create_index("wallet_address", unique=True)
             await self.users.create_index("email", unique=True, sparse=True)
-            
             await self.questions.create_index("subject")
             await self.questions.create_index("difficulty")
-            
             await self.test_sessions.create_index("user_id")
             await self.test_sessions.create_index("created_at")
-            
             await self.certificates.create_index("user_id")
             await self.certificates.create_index("token_id", unique=True)
             
@@ -60,4 +58,85 @@ class MongoService:
             print(f"Database initialization error: {e}")
             print("Continuing without database initialization...")
 
-    # ... rest of your existing methods remain the same
+    async def get_user_by_wallet(self, wallet_address: str):
+        """Get user by wallet address"""
+        return await self.users.find_one({"wallet_address": wallet_address.lower()})
+
+    async def create_user(self, wallet_address: str):
+        """Create a new user"""
+        now = datetime.utcnow()
+        user = {
+            "wallet_address": wallet_address.lower(),
+            "created_at": now,
+            "last_login": now,
+            "total_tests": 0,
+            "certificates": []
+        }
+        result = await self.users.insert_one(user)
+        user["_id"] = result.inserted_id
+        return user
+
+    async def update_user_login(self, wallet_address: str):
+        """Update user's last login time"""
+        await self.users.update_one(
+            {"wallet_address": wallet_address.lower()},
+            {"$set": {"last_login": datetime.utcnow()}}
+        )
+
+    async def insert_sample_questions(self):
+        """Insert sample questions - implement based on your needs"""
+        # You'll need to implement this method based on your question structure
+        sample_questions = [
+            {
+                "subject": "Python",
+                "difficulty": "beginner",
+                "question": "What is a variable in Python?",
+                "options": ["A storage location", "A function", "A loop", "A condition"],
+                "correct_answer": 0,
+                "created_at": datetime.utcnow()
+            },
+            # Add more sample questions as needed
+        ]
+        await self.questions.insert_many(sample_questions)
+
+    async def close_connection(self):
+        """Close the database connection"""
+        if self.client:
+            self.client.close()
+            print("MongoDB connection closed")
+
+    def create_user_sync(self, wallet_address: str):
+        """Synchronous user creation using pymongo instead of motor"""
+        import pymongo
+        
+        # Create a synchronous connection for this operation only
+        client = pymongo.MongoClient(self.uri)
+        db = client.openlearnx
+        users = db.users
+        
+        try:
+            # Check if user exists
+            user = users.find_one({"wallet_address": wallet_address.lower()})
+            
+            if not user:
+                # Create new user
+                new_user = {
+                    "wallet_address": wallet_address.lower(),
+                    "created_at": datetime.utcnow(),
+                    "last_login": datetime.utcnow(),
+                    "total_tests": 0,
+                    "certificates": []
+                }
+                result = users.insert_one(new_user)
+                new_user["_id"] = result.inserted_id
+                return new_user
+            else:
+                # Update last login
+                users.update_one(
+                    {"wallet_address": wallet_address.lower()},
+                    {"$set": {"last_login": datetime.utcnow()}}
+                )
+                return user
+        finally:
+            # Always close the connection
+            client.close()

backend/routes/auth.py

@@ -1,71 +1,90 @@
 from flask import Blueprint, request, jsonify, current_app
 import jwt
 from datetime import datetime, timedelta
+import secrets
 
-bp = Blueprint('auth', __name__)
+bp = Blueprint("auth", __name__)
 
-@bp.route('/nonce', methods=['POST'])
+# Store nonces temporarily (in production, use Redis or database)
+nonces = {}
+
+@bp.route("/nonce", methods=["POST"])
 def get_nonce():
-    """Generate nonce for wallet signature"""
     data = request.get_json()
-    wallet_address = data.get('wallet_address')
+    wallet_address = data.get("wallet_address")
     
     if not wallet_address:
-        return jsonify({"error": "Wallet address required"}), 400
+        return jsonify({"error": "wallet_address is required"}), 400
-    
-    web3_service = current_app.config['WEB3_SERVICE']
-    nonce = web3_service.generate_nonce()
     
+    # Generate nonce
+    nonce = secrets.token_hex(16)
     message = f"Sign this message to authenticate with OpenLearnX: {nonce}"
     
-    return jsonify({
+    # Store nonce for this wallet address
-        "nonce": nonce,
+    nonces[wallet_address.lower()] = nonce
-        "message": message
+    
-    })
+    return jsonify({"nonce": nonce, "message": message})
 
-@bp.route('/verify', methods=['POST'])
+@bp.route("/verify", methods=["POST"])
-async def verify_signature():
+def verify_signature():
-    """Verify MetaMask signature and create session"""
     data = request.get_json()
-    wallet_address = data.get('wallet_address')
+    wallet_address = data.get("wallet_address", "").lower()
-    signature = data.get('signature')
+    signature = data.get("signature")
-    message = data.get('message')
+    message = data.get("message")
     
     if not all([wallet_address, signature, message]):
         return jsonify({"error": "Missing required fields"}), 400
     
-    web3_service = current_app.config['WEB3_SERVICE']
+    # Verify nonce
-    mongo_service = current_app.config['MONGO_SERVICE']
+    stored_nonce = nonces.get(wallet_address)
+    if not stored_nonce or stored_nonce not in message:
+        return jsonify({"error": "Invalid nonce"}), 400
     
-    # Verify signature
+    try:
-    if not web3_service.verify_signature(wallet_address, message, signature):
+        web3_service = current_app.config["WEB3_SERVICE"]
-        return jsonify({"error": "Invalid signature"}), 401
+        
-    
+        # Verify signature
-    # Create or get user
+        if not web3_service.verify_signature(wallet_address, message, signature):
-    user = await mongo_service.create_user(wallet_address)
+            return jsonify({"error": "Invalid signature"}), 401
-    await mongo_service.update_user_login(wallet_address)
+        
-    
+        # For now, create a mock user without database operations
-    # Create JWT token
+        # This bypasses the async MongoDB issues entirely
-    token_payload = {
+        user = {
-        'user_id': str(user['_id']),
+            "_id": f"user_{wallet_address}",
-        'wallet_address': wallet_address,
+            "wallet_address": wallet_address,
-        'exp': datetime.utcnow() + timedelta(days=7)
+            "created_at": datetime.utcnow(),
-    }
+            "total_tests": 0,
-    
+            "certificates": []
-    token = jwt.encode(
-        token_payload, 
-        current_app.config['SECRET_KEY'], 
-        algorithm='HS256'
-    )
-    
-    return jsonify({
-        "success": True,
-        "token": token,
-        "user": {
-            "id": str(user['_id']),
-            "wallet_address": user['wallet_address'],
-            "created_at": user['created_at'].isoformat(),
-            "total_tests": user.get('total_tests', 0),
-            "certificates": len(user.get('certificates', []))
         }
-    })
+        
+        # Create JWT token
+        token_payload = {
+            "user_id": str(user["_id"]),
+            "wallet_address": wallet_address,
+            "exp": datetime.utcnow() + timedelta(days=7)
+        }
+        
+        token = jwt.encode(
+            token_payload, 
+            current_app.config["SECRET_KEY"], 
+            algorithm="HS256"
+        )
+        
+        # Clean up nonce
+        if wallet_address in nonces:
+            del nonces[wallet_address]
+        
+        return jsonify({
+            "success": True,
+            "token": token,
+            "user": {
+                "id": str(user["_id"]),
+                "wallet_address": user["wallet_address"],
+                "total_tests": user.get("total_tests", 0),
+                "certificates": len(user.get("certificates", []))
+            }
+        })
+        
+    except Exception as e:
+        print(f"Authentication error: {str(e)}")
+        return jsonify({"error": "Authentication failed"}), 500

backend/routes/coding.py

@@ -0,0 +1,88 @@
+from flask import Blueprint, jsonify, request, current_app
+import requests
+from bson import ObjectId
+from datetime import datetime
+
+bp = Blueprint('coding', __name__)
+PISTON_API_URL = "https://emkc.org/api/v2/piston/execute"
+
+@bp.route("/problems", methods=["GET"])
+async def get_problems():
+    mongo = current_app.config['MONGO_SERVICE']
+    problems = await mongo.db.coding_problems.find().to_list(100)
+    for p in problems:
+        p['_id'] = str(p['_id'])
+    return jsonify(problems)
+
+@bp.route("/problems/<problem_id>", methods=["GET"])
+async def get_problem(problem_id):
+    mongo = current_app.config['MONGO_SERVICE']
+    prob = await mongo.db.coding_problems.find_one({"_id": ObjectId(problem_id)})
+    if not prob:
+        return jsonify({"error": "Problem not found"}), 404
+    prob['_id'] = str(prob['_id'])
+    return jsonify(prob)
+
+@bp.route("/run", methods=["POST"])
+async def run_code():
+    data = request.json
+    problem_id = data.get("problem_id")
+    code = data.get("code")
+    language = data.get("language")
+
+    mongo = current_app.config['MONGO_SERVICE']
+    problem = await mongo.db.coding_problems.find_one({"_id": ObjectId(problem_id)})
+    if not problem:
+        return jsonify({"error": "Problem not found"}), 404
+
+    # Concatenate all test case inputs
+    input_data = '\n'.join([tc['input'] for tc in problem['test_cases']])
+
+    try:
+        resp = requests.post(
+            PISTON_API_URL,
+            json={
+                "language": language,
+                "source": code,
+                "input": input_data
+            },
+            timeout=10,
+        )
+        resp.raise_for_status()
+        result = resp.json()
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+    # Compare output against expected (simple line-by-line check)
+    output_lines = result.get("output", "").strip().split('\n')
+    expected_outputs = [tc['expected_output'].strip() for tc in problem['test_cases']]
+    correct = output_lines == expected_outputs
+
+    return jsonify({
+        "output": result.get("output"),
+        "error": result.get("stderr"),
+        "runtime": result.get("stats", {}).get("duration"),
+        "correct": correct,
+    })
+
+@bp.route("/submit", methods=["POST"])
+async def submit_solution():
+    # Same as run_code, but can mark problem as solved
+    user = await get_authenticated_user()
+    if not user:
+        return jsonify({"error": "Unauthorized"}), 401
+
+    # Run the code first
+    result = await run_code()
+    jres = result.get_json()
+
+    if jres.get("correct"):
+        mongo = current_app.config['MONGO_SERVICE']
+        # Record that user solved problem
+        await mongo.db.user_solutions.update_one(
+            {"user_id": user['_id'], "problem_id": jres.get('problem_id')},
+            {"$set": {"solved": True, "solved_at": datetime.utcnow()}},
+            upsert=True
+        )
+    return jsonify(jres)
+``

backend/routes/courses.py

@@ -0,0 +1,43 @@
+from flask import Blueprint, jsonify, current_app
+import asyncio
+from bson import ObjectId
+
+bp = Blueprint('courses', __name__)
+
+# Remove trailing slash from route definition
+@bp.route("/", methods=["GET"])
+@bp.route("", methods=["GET"])  # Add this line to handle both cases
+def list_courses():
+    try:
+        # Your existing course logic here
+        # Mock data for now since you're having DB async issues
+        courses = [
+            {
+                "id": "python-course",
+                "title": "Python Programming Mastery",
+                "subject": "Programming",
+                "description": "Learn Python from basics to advanced concepts",
+                "difficulty": "Beginner to Advanced",
+                "progress": 0
+            },
+            {
+                "id": "java-course",
+                "title": "Java Development Bootcamp",
+                "subject": "Programming",
+                "description": "Master Java programming with object-oriented concepts",
+                "difficulty": "Intermediate",
+                "progress": 0
+            },
+            {
+                "id": "ethical-hacking-course",
+                "title": "Ethical Hacking & Cybersecurity",
+                "subject": "Cybersecurity",
+                "description": "Learn ethical hacking techniques and penetration testing",
+                "difficulty": "Advanced",
+                "progress": 0
+            }
+        ]
+        return jsonify(courses)
+    except Exception as e:
+        print(f"Error in list_courses: {e}")
+        return jsonify({"error": "Failed to fetch courses"}), 500

backend/routes/quizzes.py

@@ -0,0 +1,32 @@
+from flask import Blueprint, jsonify
+
+bp = Blueprint('quizzes', __name__)
+
+# Handle both with and without trailing slash
+@bp.route("/", methods=["GET"])
+@bp.route("", methods=["GET"])  # Add this line
+def list_quizzes():
+    quizzes = [
+        {
+            "id": "python-quiz",
+            "title": "Python Fundamentals Quiz",
+            "topic": "Programming",
+            "difficulty": "Easy",
+            "recent_performance": 85
+        },
+        {
+            "id": "java-quiz", 
+            "title": "Java OOP Concepts Quiz",
+            "topic": "Programming",
+            "difficulty": "Medium",
+            "recent_performance": 78
+        },
+        {
+            "id": "security-quiz",
+            "title": "Cybersecurity Basics Quiz", 
+            "topic": "Security",
+            "difficulty": "Hard",
+            "recent_performance": 72
+        }
+    ]
+    return jsonify(quizzes)

backend/seed_courses.py

@@ -0,0 +1,72 @@
+import asyncio
+from mongo_service import MongoService
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+async def seed_courses():
+    mongo_service = MongoService(os.getenv('MONGODB_URI'))
+    
+    courses = [
+        {
+            "_id": "python-course",
+            "title": "Python Programming Mastery",
+            "subject": "Programming",
+            "description": "Learn Python from basics to advanced concepts including web development, data science, and automation.",
+            "difficulty": "Beginner to Advanced",
+            "modules": [
+                {
+                    "id": "python-basics",
+                    "title": "Python Fundamentals",
+                    "lessons": [
+                        {"id": "variables", "title": "Variables and Data Types", "type": "text"},
+                        {"id": "functions", "title": "Functions and Modules", "type": "code"}
+                    ]
+                }
+            ]
+        },
+        {
+            "_id": "java-course", 
+            "title": "Java Development Bootcamp",
+            "subject": "Programming",
+            "description": "Master Java programming with object-oriented concepts, Spring framework, and enterprise development.",
+            "difficulty": "Intermediate",
+            "modules": [
+                {
+                    "id": "java-oop",
+                    "title": "Object-Oriented Programming in Java",
+                    "lessons": [
+                        {"id": "classes", "title": "Classes and Objects", "type": "code"},
+                        {"id": "inheritance", "title": "Inheritance and Polymorphism", "type": "text"}
+                    ]
+                }
+            ]
+        },
+        {
+            "_id": "ethical-hacking-course",
+            "title": "Ethical Hacking & Cybersecurity",
+            "subject": "Cybersecurity", 
+            "description": "Learn ethical hacking techniques, penetration testing, and cybersecurity fundamentals to protect systems.",
+            "difficulty": "Advanced",
+            "modules": [
+                {
+                    "id": "recon",
+                    "title": "Reconnaissance and Information Gathering",
+                    "lessons": [
+                        {"id": "footprinting", "title": "Footprinting Techniques", "type": "text"},
+                        {"id": "scanning", "title": "Network Scanning", "type": "code"}
+                    ]
+                }
+            ]
+        }
+    ]
+    
+    try:
+        await mongo_service.db.courses.insert_many(courses)
+        print("✅ Courses seeded successfully!")
+    except Exception as e:
+        print(f"❌ Error seeding courses: {e}")
+
+if __name__ == "__main__":
+    asyncio.run(seed_courses())

backend/utils/adaptive_engine.py

@@ -0,0 +1,8 @@
+def choose_next_question(current_difficulty: int, last_answer_correct: bool) -> int:
+    """
+    Simplified adaptive engine logic adjusting difficulty for next question.
+    """
+    if last_answer_correct:
+        return min(current_difficulty + 1, 3)  # max difficulty = 3
+    else:
+        return max(current_difficulty - 1, 1)  # min difficulty = 1

frontend/.gitignore

@@ -0,0 +1,27 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

frontend/app/coding/[problemId]/page.tsx

@@ -0,0 +1,11 @@
+import { CodingProblemView } from "@/components/coding-problem-view"
+
+interface CodingProblemPageProps {
+  params: {
+    problemId: string
+  }
+}
+
+export default function CodingProblemPage({ params }: CodingProblemPageProps) {
+  return <CodingProblemView problemId={params.problemId} />
+}

frontend/app/coding/page.tsx

@@ -0,0 +1,5 @@
+import { CodingProblemList } from "@/components/coding-problem-list"
+
+export default function CodingPage() {
+  return <CodingProblemList />
+}

frontend/app/courses/[courseId]/lesson/[lessonId]/page.tsx

@@ -0,0 +1,91 @@
+"use client"
+
+import { CourseSidebar } from "@/components/course-sidebar"
+import { LessonViewer } from "@/components/lesson-viewer"
+import { Loader2 } from "lucide-react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import { useState, useEffect } from "react"
+import type { Course } from "@/lib/types"
+import api from "@/lib/api" // Corrected import: default import
+
+interface CourseDetailPageProps {
+  params: {
+    courseId: string
+    lessonId: string
+  }
+}
+
+export default function CourseDetailPage({ params }: CourseDetailPageProps) {
+  const { courseId, lessonId } = params
+  const { user, firebaseUser, isLoadingAuth } = useAuth() // Allow firebaseUser
+  const router = useRouter()
+  const [course, setCourse] = useState<Course | null>(null)
+  const [isLoadingCourse, setIsLoadingCourse] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view courses.")
+      router.push("/")
+      return
+    }
+
+    const fetchCourse = async () => {
+      setIsLoadingCourse(true)
+      setError(null)
+      try {
+        // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+        const response = await api.get<Course>(`/api/courses/${courseId}`)
+        setCourse(response.data)
+      } catch (err: any) {
+        console.error("Failed to fetch course details:", err)
+        setError(err.response?.data?.message || "Failed to load course details.")
+        toast.error(err.response?.data?.message || "Failed to load course details.")
+      } finally {
+        setIsLoadingCourse(false)
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Only fetch if either user type is logged in
+      fetchCourse()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, courseId])
+
+  if (isLoadingAuth || isLoadingCourse) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading course...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (!course) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl">Course not found.</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex flex-col md:flex-row min-h-[calc(100vh-64px)]">
+      <CourseSidebar courseId={course.id} modules={course.modules} activeLessonId={lessonId} />
+      <div className="flex-1 p-4 md:p-8 overflow-y-auto">
+        <LessonViewer courseId={course.id} lessonId={lessonId} />
+      </div>
+    </div>
+  )
+}

frontend/app/courses/[courseId]/page.tsx

@@ -0,0 +1,105 @@
+"use client"
+
+import { CourseSidebar } from "@/components/course-sidebar"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Loader2 } from "lucide-react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import { useState, useEffect } from "react"
+import type { Course } from "@/lib/types"
+import api from "@/lib/api" // Corrected import: default import
+
+interface CourseOverviewPageProps {
+  params: {
+    courseId: string
+  }
+}
+
+export default function CourseOverviewPage({ params }: CourseOverviewPageProps) {
+  const { courseId } = params
+  const { user, firebaseUser, isLoadingAuth } = useAuth() // Allow firebaseUser
+  const router = useRouter()
+  const [course, setCourse] = useState<Course | null>(null)
+  const [isLoadingCourse, setIsLoadingCourse] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view courses.")
+      router.push("/")
+      return
+    }
+
+    const fetchCourse = async () => {
+      setIsLoadingCourse(true)
+      setError(null)
+      try {
+        // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+        const response = await api.get<Course>(`/api/courses/${courseId}`)
+        setCourse(response.data)
+      } catch (err: any) {
+        console.error("Failed to fetch course details:", err)
+        setError(err.response?.data?.message || "Failed to load course details.")
+        toast.error(err.response?.data?.message || "Failed to load course details.")
+      } finally {
+        setIsLoadingCourse(false)
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Only fetch if either user type is logged in
+      fetchCourse()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, courseId])
+
+  useEffect(() => {
+    if (course && course.modules.length > 0 && course.modules[0].lessons.length > 0) {
+      // Redirect to the first lesson of the course
+      router.replace(`/courses/${courseId}/lesson/${course.modules[0].lessons[0].id}`)
+    }
+  }, [course, courseId, router])
+
+  if (isLoadingAuth || isLoadingCourse) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading course...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (!course) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl">Course not found.</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex flex-col md:flex-row min-h-[calc(100vh-64px)]">
+      <CourseSidebar courseId={course.id} modules={course.modules} activeLessonId="" />
+      <div className="flex-1 p-4 md:p-8 overflow-y-auto">
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader>
+            <CardTitle className="text-2xl font-bold text-primary-purple">{course.title} Overview</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <p className="text-lg text-gray-700 dark:text-gray-200">{course.description}</p>
+            <p className="text-gray-600 dark:text-gray-300">Select a lesson from the sidebar to begin.</p>
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  )
+}

frontend/app/courses/page.tsx

@@ -0,0 +1,5 @@
+import { CourseList } from "@/components/course-list"
+
+export default function CoursesPage() {
+  return <CourseList />
+}

frontend/app/dashboard/page.tsx

@@ -0,0 +1,5 @@
+import { DashboardStatsOverview } from "@/components/dashboard-stats"
+
+export default function DashboardPage() {
+  return <DashboardStatsOverview />
+}

frontend/app/globals.css

@@ -0,0 +1,90 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@layer utilities {
+  .text-balance {
+    text-wrap: balance;
+  }
+}
+
+@layer base {
+  :root {
+    --background: 0 0% 100%;
+    --foreground: 0 0% 3.9%;
+    --card: 0 0% 100%;
+    --card-foreground: 0 0% 3.9%;
+    --popover: 0 0% 100%;
+    --popover-foreground: 0 0% 3.9%;
+    --primary: 0 0% 9%;
+    --primary-foreground: 0 0% 98%;
+    --secondary: 0 0% 96.1%;
+    --secondary-foreground: 0 0% 9%;
+    --muted: 0 0% 96.1%;
+    --muted-foreground: 0 0% 45.1%;
+    --accent: 0 0% 96.1%;
+    --accent-foreground: 0 0% 9%;
+    --destructive: 0 84.2% 60.2%;
+    --destructive-foreground: 0 0% 98%;
+    --border: 0 0% 89.8%;
+    --input: 0 0% 89.8%;
+    --ring: 0 0% 3.9%;
+    --chart-1: 12 76% 61%;
+    --chart-2: 173 58% 39%;
+    --chart-3: 197 37% 24%;
+    --chart-4: 43 74% 66%;
+    --chart-5: 27 87% 67%;
+    --radius: 0.5rem;
+    --sidebar-background: 0 0% 98%;
+    --sidebar-foreground: 240 5.3% 26.1%;
+    --sidebar-primary: 240 5.9% 10%;
+    --sidebar-primary-foreground: 0 0% 98%;
+    --sidebar-accent: 240 4.8% 95.9%;
+    --sidebar-accent-foreground: 240 5.9% 10%;
+    --sidebar-border: 220 13% 91%;
+    --sidebar-ring: 217.2 91.2% 59.8%;
+  }
+  .dark {
+    --background: 0 0% 3.9%;
+    --foreground: 0 0% 98%;
+    --card: 0 0% 3.9%;
+    --card-foreground: 0 0% 98%;
+    --popover: 0 0% 3.9%;
+    --popover-foreground: 0 0% 98%;
+    --primary: 0 0% 98%;
+    --primary-foreground: 0 0% 9%;
+    --secondary: 0 0% 14.9%;
+    --secondary-foreground: 0 0% 98%;
+    --muted: 0 0% 14.9%;
+    --muted-foreground: 0 0% 63.9%;
+    --accent: 0 0% 14.9%;
+    --accent-foreground: 0 0% 98%;
+    --destructive: 0 62.8% 30.6%;
+    --destructive-foreground: 0 0% 98%;
+    --border: 0 0% 14.9%;
+    --input: 0 0% 14.9%;
+    --ring: 0 0% 83.1%;
+    --chart-1: 220 70% 50%;
+    --chart-2: 160 60% 45%;
+    --chart-3: 30 80% 55%;
+    --chart-4: 280 65% 60%;
+    --chart-5: 340 75% 55%;
+    --sidebar-background: 240 5.9% 10%;
+    --sidebar-foreground: 240 4.8% 95.9%;
+    --sidebar-primary: 224.3 76.3% 48%;
+    --sidebar-primary-foreground: 0 0% 100%;
+    --sidebar-accent: 240 3.7% 15.9%;
+    --sidebar-accent-foreground: 240 4.8% 95.9%;
+    --sidebar-border: 240 3.7% 15.9%;
+    --sidebar-ring: 217.2 91.2% 59.8%;
+  }
+}
+
+@layer base {
+  * {
+    @apply border-border;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}

frontend/app/layout.tsx

@@ -0,0 +1,36 @@
+import type React from "react"
+import type { Metadata } from "next"
+import { Inter } from "next/font/google"
+import "./globals.css"
+import { Toaster } from "react-hot-toast"
+import { AuthProvider } from "@/context/auth-context"
+import { Navbar } from "@/components/ui/navbar"
+import { ThemeProvider } from "@/components/theme-provider"
+
+const inter = Inter({ subsets: ["latin"] })
+
+export const metadata: Metadata = {
+  title: "OpenLearnX - Decentralized Adaptive Learning",
+  description: "AI-powered adaptive testing with blockchain-secured credentials.",
+    generator: 'v0.dev'
+}
+
+export default function RootLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode
+}>) {
+  return (
+    <html lang="en" suppressHydrationWarning>
+      <body className={inter.className}>
+        <ThemeProvider attribute="class" defaultTheme="system" enableSystem disableTransitionOnChange>
+          <AuthProvider>
+            <Navbar />
+            <main>{children}</main>
+            <Toaster position="top-right" />
+          </AuthProvider>
+        </ThemeProvider>
+      </body>
+    </html>
+  )
+}

frontend/app/page.tsx

@@ -0,0 +1,92 @@
+import Link from "next/link"
+import { Button } from "@/components/ui/button"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Brain, Zap, LinkIcon, BookOpen, Code, Lightbulb } from "lucide-react"
+
+export default function Home() {
+  return (
+    <div className="flex flex-col min-h-[calc(100vh-64px)]">
+      <section className="relative w-full py-12 md:py-24 lg:py-32 bg-gradient-to-r from-primary-blue to-primary-purple text-white">
+        <div className="container px-4 md:px-6 text-center">
+          <div className="max-w-3xl mx-auto space-y-4">
+            <h1 className="text-4xl font-bold tracking-tighter sm:text-5xl md:text-6xl">
+              OpenLearnX – Decentralized Adaptive Learning
+            </h1>
+            <p className="text-lg md:text-xl">
+              Unlock your potential with AI-powered adaptive learning, coding practice, and blockchain-secured
+              credentials.
+            </p>
+            <div className="flex flex-col gap-2 sm:flex-row justify-center">
+              <Link href="/courses">
+                <Button className="bg-white text-primary-purple hover:bg-gray-100 px-8 py-3 text-lg font-semibold rounded-full shadow-lg">
+                  Start Learning
+                </Button>
+              </Link>
+            </div>
+          </div>
+        </div>
+      </section>
+
+      <section className="w-full py-12 md:py-24 lg:py-32 bg-gray-50 dark:bg-gray-900">
+        <div className="container px-4 md:px-6">
+          <div className="grid gap-8 md:grid-cols-2 lg:grid-cols-3">
+            <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+              <CardHeader className="flex flex-row items-center space-x-4 pb-2">
+                <BookOpen className="h-8 w-8 text-primary-blue" />
+                <CardTitle className="text-xl font-semibold">Interactive Courses</CardTitle>
+              </CardHeader>
+              <CardContent className="text-gray-600 dark:text-gray-300">
+                Engage with rich multimedia content, track your progress, and master new subjects at your own pace.
+              </CardContent>
+            </Card>
+            <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+              <CardHeader className="flex flex-row items-center space-x-4 pb-2">
+                <Code className="h-8 w-8 text-primary-purple" />
+                <CardTitle className="text-xl font-semibold">LeetCode-Style Coding Practice</CardTitle>
+              </CardHeader>
+              <CardContent className="text-gray-600 dark:text-gray-300">
+                Sharpen your coding skills with interactive problems, instant feedback, and a built-in code editor.
+              </CardContent>
+            </Card>
+            <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+              <CardHeader className="flex flex-row items-center space-x-4 pb-2">
+                <Lightbulb className="h-8 w-8 text-primary-blue" />
+                <CardTitle className="text-xl font-semibold">Advanced Quiz Platform</CardTitle>
+              </CardHeader>
+              <CardContent className="text-gray-600 dark:text-gray-300">
+                Test your knowledge with timed multiple-choice quizzes, detailed explanations, and performance tracking.
+              </CardContent>
+            </Card>
+            <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+              <CardHeader className="flex flex-row items-center space-x-4 pb-2">
+                <Brain className="h-8 w-8 text-primary-purple" />
+                <CardTitle className="text-xl font-semibold">AI-powered Adaptive Learning</CardTitle>
+              </CardHeader>
+              <CardContent className="text-gray-600 dark:text-gray-300">
+                Our platform intelligently adjusts content and question difficulty based on your performance.
+              </CardContent>
+            </Card>
+            <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+              <CardHeader className="flex flex-row items-center space-x-4 pb-2">
+                <LinkIcon className="h-8 w-8 text-primary-blue" />
+                <CardTitle className="text-xl font-semibold">Blockchain-secured Credentials</CardTitle>
+              </CardHeader>
+              <CardContent className="text-gray-600 dark:text-gray-300">
+                Your achievements are secured on the blockchain, providing verifiable and tamper-proof records.
+              </CardContent>
+            </Card>
+            <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+              <CardHeader className="flex flex-row items-center space-x-4 pb-2">
+                <Zap className="h-8 w-8 text-primary-purple" />
+                <CardTitle className="text-xl font-semibold">Personalized Dashboard</CardTitle>
+              </CardHeader>
+              <CardContent className="text-gray-600 dark:text-gray-300">
+                Track your progress, identify strengths and weaknesses, and visualize your learning journey.
+              </CardContent>
+            </Card>
+          </div>
+        </div>
+      </section>
+    </div>
+  )
+}

frontend/app/quizzes/[quizId]/page.tsx

@@ -0,0 +1,11 @@
+import { QuizRunner } from "@/components/quiz-runner"
+
+interface QuizPageProps {
+  params: {
+    quizId: string
+  }
+}
+
+export default function QuizPage({ params }: QuizPageProps) {
+  return <QuizRunner quizId={params.quizId} />
+}

frontend/app/quizzes/page.tsx

@@ -0,0 +1,5 @@
+import { QuizList } from "@/components/quiz-list"
+
+export default function QuizzesPage() {
+  return <QuizList />
+}

frontend/app/test/page.tsx

@@ -0,0 +1,5 @@
+import { TestingSession } from "@/components/testing-session"
+
+export default function TestPage() {
+  return <TestingSession />
+}

frontend/components.json

@@ -0,0 +1,21 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "default",
+  "rsc": true,
+  "tsx": true,
+  "tailwind": {
+    "config": "tailwind.config.ts",
+    "css": "app/globals.css",
+    "baseColor": "neutral",
+    "cssVariables": true,
+    "prefix": ""
+  },
+  "aliases": {
+    "components": "@/components",
+    "utils": "@/lib/utils",
+    "ui": "@/components/ui",
+    "lib": "@/lib",
+    "hooks": "@/hooks"
+  },
+  "iconLibrary": "lucide"
+}

frontend/components/auth-buttons.tsx

@@ -0,0 +1,128 @@
+"use client"
+
+import { useState } from "react"
+import { useAuth } from "@/context/auth-context"
+import { Button } from "@/components/ui/button"
+import { Loader2 } from "lucide-react"
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogTrigger } from "@/components/ui/dialog"
+import { Input } from "@/components/ui/input"
+import { Label } from "@/components/ui/label"
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
+
+export function AuthButtons() {
+  const { user, firebaseUser, isLoadingAuth, authMethod, connectWallet, loginWithEmail, signupWithEmail, logout } =
+    useAuth()
+  const [email, setEmail] = useState("")
+  const [password, setPassword] = useState("")
+  const [isAuthModalOpen, setIsAuthModalOpen] = useState(false)
+
+  const handleEmailLogin = async () => {
+    await loginWithEmail(email, password)
+    setIsAuthModalOpen(false)
+  }
+
+  const handleEmailSignup = async () => {
+    await signupWithEmail(email, password)
+    setIsAuthModalOpen(false)
+  }
+
+  const displayAddress = user?.wallet_address || firebaseUser?.email || "Guest"
+
+  return (
+    <div className="flex items-center gap-4">
+      {authMethod ? (
+        <>
+          <span className="text-sm text-gray-600 dark:text-gray-300">
+            Connected:{" "}
+            {authMethod === "metamask" && user?.wallet_address
+              ? `${user.wallet_address.slice(0, 6)}...${user.wallet_address.slice(-4)}`
+              : authMethod === "firebase" && firebaseUser?.email
+                ? firebaseUser.email
+                : displayAddress}
+          </span>
+          <Button onClick={logout} variant="outline" disabled={isLoadingAuth}>
+            Logout
+          </Button>
+        </>
+      ) : (
+        <Dialog open={isAuthModalOpen} onOpenChange={setIsAuthModalOpen}>
+          <DialogTrigger asChild>
+            <Button disabled={isLoadingAuth}>
+              {isLoadingAuth && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+              Login / Sign Up
+            </Button>
+          </DialogTrigger>
+          <DialogContent className="sm:max-w-[425px] dark:bg-gray-900 dark:text-gray-100">
+            <DialogHeader>
+              <DialogTitle>Choose your authentication method</DialogTitle>
+            </DialogHeader>
+            <Tabs defaultValue="metamask" className="w-full">
+              <TabsList className="grid w-full grid-cols-2">
+                <TabsTrigger value="metamask">MetaMask</TabsTrigger>
+                <TabsTrigger value="email">Email</TabsTrigger>
+              </TabsList>
+              <TabsContent value="metamask" className="space-y-4 p-4">
+                <p className="text-sm text-gray-600 dark:text-gray-300">
+                  Connect your MetaMask wallet for full access to courses, coding, and blockchain features.
+                </p>
+                <Button
+                  onClick={connectWallet}
+                  disabled={isLoadingAuth}
+                  className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white"
+                >
+                  {isLoadingAuth && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+                  Connect MetaMask
+                </Button>
+              </TabsContent>
+              <TabsContent value="email" className="space-y-4 p-4">
+                <p className="text-sm text-gray-600 dark:text-gray-300">
+                  Use email for a quick testing process (quizzes only).
+                </p>
+                <div className="space-y-2">
+                  <Label htmlFor="email">Email</Label>
+                  <Input
+                    id="email"
+                    type="email"
+                    placeholder="your@email.com"
+                    value={email}
+                    onChange={(e) => setEmail(e.target.value)}
+                    className="dark:bg-gray-700 dark:border-gray-600"
+                  />
+                </div>
+                <div className="space-y-2">
+                  <Label htmlFor="password">Password</Label>
+                  <Input
+                    id="password"
+                    type="password"
+                    value={password}
+                    onChange={(e) => setPassword(e.target.value)}
+                    className="dark:bg-gray-700 dark:border-gray-600"
+                  />
+                </div>
+                <div className="flex gap-2">
+                  <Button
+                    onClick={handleEmailLogin}
+                    disabled={isLoadingAuth}
+                    className="flex-1 bg-primary-purple hover:bg-primary-purple/90 text-white"
+                  >
+                    {isLoadingAuth && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+                    Login
+                  </Button>
+                  <Button
+                    onClick={handleEmailSignup}
+                    disabled={isLoadingAuth}
+                    variant="outline"
+                    className="flex-1 dark:text-gray-100 dark:border-gray-600 bg-transparent"
+                  >
+                    {isLoadingAuth && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+                    Sign Up
+                  </Button>
+                </div>
+              </TabsContent>
+            </Tabs>
+          </DialogContent>
+        </Dialog>
+      )}
+    </div>
+  )
+}

frontend/components/code-editor.tsx

@@ -0,0 +1,53 @@
+"use client"
+
+import { Textarea } from "@/components/ui/textarea"
+import { Label } from "@/components/ui/label"
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
+
+interface CodeEditorProps {
+  code: string
+  onCodeChange: (code: string) => void
+  language: string
+  onLanguageChange: (lang: string) => void
+  availableLanguages: string[]
+  readOnly?: boolean
+}
+
+export function CodeEditor({
+  code,
+  onCodeChange,
+  language,
+  onLanguageChange,
+  availableLanguages,
+  readOnly = false,
+}: CodeEditorProps) {
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <Label htmlFor="code-editor" className="text-lg font-semibold">
+          Code Editor
+        </Label>
+        <Select onValueChange={onLanguageChange} value={language} disabled={readOnly}>
+          <SelectTrigger className="w-[120px]">
+            <SelectValue placeholder="Language" />
+          </SelectTrigger>
+          <SelectContent>
+            {availableLanguages.map((lang) => (
+              <SelectItem key={lang} value={lang}>
+                {lang}
+              </SelectItem>
+            ))}
+          </SelectContent>
+        </Select>
+      </div>
+      <Textarea
+        id="code-editor"
+        value={code}
+        onChange={(e) => onCodeChange(e.target.value)}
+        className="font-mono text-sm h-96 bg-gray-900 text-white border-gray-700 focus:border-primary-blue focus:ring-primary-blue"
+        placeholder="Write your code here..."
+        readOnly={readOnly}
+      />
+    </div>
+  )
+}

frontend/components/coding-problem-list.tsx

@@ -0,0 +1,131 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import type { CodingProblem } from "@/lib/types"
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
+import { Badge } from "@/components/ui/badge"
+import { Button } from "@/components/ui/button"
+import Link from "next/link"
+import { Loader2, CheckCircle2 } from "lucide-react"
+import { api } from "@/lib/api" // Import api
+
+export function CodingProblemList() {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Check token for access
+  const router = useRouter()
+  const [problems, setProblems] = useState<CodingProblem[]>([])
+  const [isLoadingProblems, setIsLoadingProblems] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view coding problems.")
+      router.push("/")
+      return
+    }
+
+    const fetchProblems = async () => {
+      setIsLoadingProblems(true)
+      setError(null)
+      try {
+        // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+        const response = await api.get<CodingProblem[]>("/api/coding/problems")
+        setProblems(response.data)
+        // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+      } catch (err: any) {
+        console.error("Failed to fetch coding problems:", err)
+        setError(err.response?.data?.message || "Failed to load coding problems.")
+        toast.error(err.response?.data?.message || "Failed to load coding problems.")
+      } finally {
+        setIsLoadingProblems(false)
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Only fetch if either user type is logged in
+      fetchProblems()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, token])
+
+  const getDifficultyColor = (difficulty: CodingProblem["difficulty"]) => {
+    switch (difficulty) {
+      case "Easy":
+        return "bg-success text-white"
+      case "Medium":
+        return "bg-warning text-white"
+      case "Hard":
+        return "bg-destructive text-white"
+      default:
+        return "bg-gray-500 text-white"
+    }
+  }
+
+  if (isLoadingAuth || isLoadingProblems) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading coding problems...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (problems.length === 0) {
+    return (
+      <div className="flex flex-col items-center justify-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl mb-4">No coding problems available yet.</p>
+        <p>Check back later for new challenges!</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4">
+      {authMethod === "firebase" && !token && (
+        <div className="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4 mb-6 rounded-md dark:bg-yellow-900 dark:border-yellow-600 dark:text-yellow-200">
+          <p className="font-bold">Limited Access</p>
+          <p>
+            You are logged in with email. Full functionality, including progress tracking and data persistence, requires
+            connecting your MetaMask wallet.
+          </p>
+        </div>
+      )}
+      <h1 className="text-3xl font-bold text-primary-purple mb-8 text-center">Coding Practice</h1>
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+        {problems.map((problem) => (
+          <Card
+            key={problem.id}
+            className="bg-white shadow-md rounded-lg overflow-hidden dark:bg-gray-800 dark:text-gray-100"
+          >
+            <CardHeader>
+              <div className="flex items-center justify-between mb-2">
+                <CardTitle className="text-xl font-semibold">{problem.title}</CardTitle>
+                {problem.solved && <CheckCircle2 className="h-6 w-6 text-success" />}
+              </div>
+              <CardDescription className="flex items-center gap-2">
+                <Badge className={getDifficultyColor(problem.difficulty)}>{problem.difficulty}</Badge>
+                <Badge variant="secondary">{problem.category}</Badge>
+              </CardDescription>
+            </CardHeader>
+            <CardContent className="space-y-4">
+              <p className="text-gray-700 dark:text-gray-200 line-clamp-3">{problem.description}</p>
+              <Link href={`/coding/${problem.id}`}>
+                <Button className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white">Solve Problem</Button>
+              </Link>
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+    </div>
+  )
+}

frontend/components/coding-problem-view.tsx

@@ -0,0 +1,213 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import type { CodingProblem, CodeExecutionResult } from "@/lib/types"
+import { CodeEditor } from "./code-editor"
+import { TestResultsPanel } from "./test-results-panel"
+import { SolutionTabs } from "./solution-tabs"
+import { Button } from "@/components/ui/button"
+import { Loader2 } from "lucide-react"
+import { api } from "@/lib/api" // Import api
+
+interface CodingProblemViewProps {
+  problemId: string
+}
+
+export function CodingProblemView({ problemId }: CodingProblemViewProps) {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Check token for access
+  const router = useRouter()
+  const [problem, setProblem] = useState<CodingProblem | null>(null)
+  const [code, setCode] = useState<string>("")
+  const [language, setLanguage] = useState<string>("python") // Default language
+  const [executionResults, setExecutionResults] = useState<CodeExecutionResult | null>(null)
+  const [isLoadingProblem, setIsLoadingProblem] = useState(true)
+  const [isExecutingCode, setIsExecutingCode] = useState(false)
+  const [isSubmittingSolution, setIsSubmittingSolution] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  const availableLanguages = ["python", "javascript", "java"] // Example languages
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view coding problems.")
+      router.push("/")
+      return
+    }
+
+    const fetchProblem = async () => {
+      setIsLoadingProblem(true)
+      setError(null)
+      try {
+        const response = await api.get<CodingProblem>(`/api/coding/problems/${problemId}`, {
+          headers: {
+            Authorization: `Bearer ${token}`,
+          },
+        })
+        setProblem(response.data)
+        if (response.data.initial_code[language]) {
+          setCode(response.data.initial_code[language])
+        } else if (Object.keys(response.data.initial_code).length > 0) {
+          const firstLang = Object.keys(response.data.initial_code)[0]
+          setLanguage(firstLang)
+          setCode(response.data.initial_code[firstLang])
+        }
+      } catch (err: any) {
+        console.error("Failed to fetch coding problem:", err)
+        setError(err.response?.data?.message || "Failed to load coding problem.")
+        toast.error(err.response?.data?.message || "Failed to load coding problem.")
+      } finally {
+        setIsLoadingProblem(false)
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Only fetch if either user type is logged in
+      fetchProblem()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, problemId, language, token])
+
+  const handleRunCode = async () => {
+    if (!problem || !code || !token) {
+      toast.error("Please connect your MetaMask wallet to run code.")
+      return // Ensure token exists for this action
+    }
+    setIsExecutingCode(true)
+    setExecutionResults(null)
+    try {
+      const response = await api.post<CodeExecutionResult>(
+        "/api/coding/run",
+        {
+          problem_id: problem.id,
+          code,
+          language,
+        },
+        {
+          headers: {
+            Authorization: `Bearer ${token}`,
+          },
+        },
+      )
+      setExecutionResults(response.data)
+      if (response.data.correct) {
+        toast.success("Code ran successfully and passed tests!")
+      } else {
+        toast.error("Code ran, but failed some tests.")
+      }
+    } catch (err: any) {
+      console.error("Failed to run code:", err)
+      toast.error(err.response?.data?.message || "Failed to run code.")
+    } finally {
+      setIsExecutingCode(false)
+    }
+  }
+
+  const handleSubmitSolution = async () => {
+    if (!problem || !code || !token) {
+      toast.error("Please connect your MetaMask wallet to submit solutions.")
+      return // Ensure token exists for this action
+    }
+    setIsSubmittingSolution(true)
+    try {
+      const response = await api.post<CodeExecutionResult>(
+        "/api/coding/submit",
+        {
+          problem_id: problem.id,
+          code,
+          language,
+        },
+        {
+          headers: {
+            Authorization: `Bearer ${token}`,
+          },
+        },
+      )
+      setExecutionResults(response.data)
+      if (response.data.correct) {
+        toast.success("Solution submitted successfully and passed all tests!")
+        setProblem((prev) => (prev ? { ...prev, solved: true } : null)) // Mark as solved
+      } else {
+        toast.error("Solution submitted, but failed some tests. Keep trying!")
+      }
+    } catch (err: any) {
+      console.error("Failed to submit solution:", err)
+      toast.error(err.response?.data?.message || "Failed to submit solution.")
+    } finally {
+      setIsSubmittingSolution(false)
+    }
+  }
+
+  if (isLoadingAuth || isLoadingProblem) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading problem...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (!problem) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl">Coding problem not found.</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4 grid grid-cols-1 lg:grid-cols-2 gap-8 min-h-[calc(100vh-64px)]">
+      <div className="space-y-6">
+        {authMethod === "firebase" && !token && (
+          <div className="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4 rounded-md dark:bg-yellow-900 dark:border-yellow-600 dark:text-yellow-200">
+            <p className="font-bold">Limited Access</p>
+            <p>
+              You are logged in with email. Full functionality, including code execution and submission, requires
+              connecting your MetaMask wallet.
+            </p>
+          </div>
+        )}
+        <h1 className="text-3xl font-bold text-primary-purple">{problem.title}</h1>
+        <SolutionTabs problemDescription={problem.description} testCases={problem.test_cases} />
+      </div>
+      <div className="space-y-6">
+        <CodeEditor
+          code={code}
+          onCodeChange={setCode}
+          language={language}
+          onLanguageChange={setLanguage}
+          availableLanguages={availableLanguages}
+        />
+        <div className="flex gap-4 justify-end">
+          <Button
+            onClick={handleRunCode}
+            disabled={isExecutingCode || isSubmittingSolution || !token} // Disable if no token
+            className="bg-primary-purple hover:bg-primary-purple/90 text-white"
+          >
+            {isExecutingCode && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+            Run Code
+          </Button>
+          <Button
+            onClick={handleSubmitSolution}
+            disabled={isExecutingCode || isSubmittingSolution || problem.solved || !token} // Disable if no token
+            className="bg-primary-blue hover:bg-primary-blue/90 text-white"
+          >
+            {isSubmittingSolution && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+            {problem.solved ? "Solved!" : "Submit"}
+          </Button>
+        </div>
+        <TestResultsPanel results={executionResults} isLoading={isExecutingCode} />
+      </div>
+    </div>
+  )
+}

frontend/components/course-list.tsx

@@ -0,0 +1,124 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import type { Course } from "@/lib/types"
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
+import { Progress } from "@/components/ui/progress"
+import { Button } from "@/components/ui/button"
+import Link from "next/link"
+import { Loader2 } from "lucide-react"
+import api from "@/lib/api" // Corrected import: default import
+
+export function CourseList() {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Check token for access
+  const router = useRouter()
+  const [courses, setCourses] = useState<Course[]>([])
+  const [isLoadingCourses, setIsLoadingCourses] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view courses.")
+      router.push("/")
+      return
+    }
+
+    const fetchCourses = async () => {
+      setIsLoadingCourses(true)
+      setError(null)
+      try {
+        const response = await api.get<Course[]>("/api/courses")
+        setCourses(response.data)
+      } catch (err: any) {
+        console.error("Failed to fetch courses:", err)
+        if (err.code === "ERR_NETWORK") {
+          setError(
+            "Network Error: Could not connect to the backend server. Please ensure your Flask backend is running and accessible.",
+          )
+          toast.error("Network Error: Backend server unreachable.")
+        } else {
+          setError(err.response?.data?.message || "Failed to load courses.")
+          toast.error(err.response?.data?.message || "Failed to load courses.")
+        }
+      } finally {
+        setIsLoadingCourses(false)
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Fetch if either user type is logged in
+      fetchCourses()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, token])
+
+  if (isLoadingAuth || isLoadingCourses) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading courses...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (courses.length === 0) {
+    return (
+      <div className="flex flex-col items-center justify-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl mb-4">No courses available yet.</p>
+        <p>Check back later for new content!</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4">
+      {authMethod === "firebase" && !token && (
+        <div className="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4 mb-6 rounded-md dark:bg-yellow-900 dark:border-yellow-600 dark:text-yellow-200">
+          <p className="font-bold">Limited Access</p>
+          <p>
+            You are logged in with email. Full functionality, including progress tracking and data persistence, requires
+            connecting your MetaMask wallet.
+          </p>
+        </div>
+      )}
+      <h1 className="text-3xl font-bold text-primary-purple mb-8 text-center">Available Courses</h1>
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+        {courses.map((course) => (
+          <Card
+            key={course.id}
+            className="bg-white shadow-md rounded-lg overflow-hidden dark:bg-gray-800 dark:text-gray-100"
+          >
+            <CardHeader>
+              <CardTitle className="text-xl font-semibold">{course.title}</CardTitle>
+              <CardDescription className="text-gray-600 dark:text-gray-300">{course.subject}</CardDescription>
+            </CardHeader>
+            <CardContent className="space-y-4">
+              <p className="text-gray-700 dark:text-gray-200">{course.description}</p>
+              <div className="space-y-2">
+                <div className="flex justify-between text-sm font-medium text-gray-700 dark:text-gray-300">
+                  <span>Progress</span>
+                  <span>{course.progress}%</span>
+                </div>
+                <Progress value={course.progress} className="h-2 bg-primary-blue" />
+              </div>
+              <Link href={`/courses/${course.id}`}>
+                <Button className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white">View Course</Button>
+              </Link>
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+    </div>
+  )
+}

frontend/components/course-sidebar.tsx

@@ -0,0 +1,45 @@
+"use client"
+
+import Link from "next/link"
+import type { Module } from "@/lib/types"
+import { cn } from "@/lib/utils"
+import { CheckCircle2 } from "lucide-react"
+
+interface CourseSidebarProps {
+  courseId: string
+  modules: Module[]
+  activeLessonId: string
+}
+
+export function CourseSidebar({ courseId, modules, activeLessonId }: CourseSidebarProps) {
+  return (
+    <div className="w-full md:w-64 lg:w-80 flex-shrink-0 border-r bg-gray-50 dark:bg-gray-900 p-4 overflow-y-auto">
+      <h2 className="text-lg font-bold text-primary-purple mb-4">Course Content</h2>
+      <nav className="space-y-4">
+        {modules.map((module) => (
+          <div key={module.id}>
+            <h3 className="text-md font-semibold text-gray-800 dark:text-gray-100 mb-2">{module.title}</h3>
+            <ul className="space-y-1">
+              {module.lessons.map((lesson) => (
+                <li key={lesson.id}>
+                  <Link
+                    href={`/courses/${courseId}/lesson/${lesson.id}`}
+                    className={cn(
+                      "flex items-center gap-2 p-2 rounded-md text-sm transition-colors",
+                      activeLessonId === lesson.id
+                        ? "bg-primary-blue text-white"
+                        : "text-gray-700 hover:bg-gray-200 dark:text-gray-300 dark:hover:bg-gray-700",
+                    )}
+                  >
+                    {lesson.completed && <CheckCircle2 className="h-4 w-4 text-success" />}
+                    <span>{lesson.title}</span>
+                  </Link>
+                </li>
+              ))}
+            </ul>
+          </div>
+        ))}
+      </nav>
+    </div>
+  )
+}

frontend/components/dashboard-stats.tsx

@@ -0,0 +1,168 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/router"
+import { toast } from "react-hot-toast"
+import type { DashboardStats, ActivityData } from "@/lib/types"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Loader2, Award, BookOpen, Code, CheckCircle2, TrendingUp } from "lucide-react"
+import api from "@/lib/api"
+
+export function DashboardStatsOverview() {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Check token for access
+  const router = useRouter()
+  const [stats, setStats] = useState<DashboardStats | null>(null)
+  const [activity, setActivity] = useState<ActivityData[]>([])
+  const [isLoadingData, setIsLoadingData] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view your dashboard.")
+      router.push("/")
+      return
+    }
+
+    const fetchDashboardData = async () => {
+      setIsLoadingData(true)
+      setError(null)
+      try {
+        // --- ORIGINAL API CALLS (UNCOMMENT WHEN BACKEND IS READY) ---
+        const statsResponse = await api.get<DashboardStats>("/api/dashboard/stats")
+        setStats(statsResponse.data)
+
+        const activityResponse = await api.get<ActivityData[]>("/api/dashboard/activity")
+        setActivity(activityResponse.data)
+      } catch (err: any) {
+        console.error("Failed to fetch dashboard data:", err)
+        setError(err.response?.data?.message || "Failed to load dashboard data.")
+        toast.error(err.response?.data?.message || "Failed to load dashboard data.")
+      } finally {
+        setIsLoadingData(false) // Handled by setTimeout
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Only fetch if either user type is logged in
+      fetchDashboardData()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, token])
+
+  if (isLoadingAuth || isLoadingData) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading dashboard...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (!stats) {
+    return (
+      <div className="flex flex-col items-center justify-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl mb-4">No dashboard data available.</p>
+        <p>Start learning to see your progress!</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4">
+      {authMethod === "firebase" && !token && (
+        <div className="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4 mb-6 rounded-md dark:bg-yellow-900 dark:border-yellow-600 dark:text-yellow-200">
+          <p className="font-bold">Limited Access</p>
+          <p>
+            You are logged in with email. Full functionality, including personalized stats and activity tracking,
+            requires connecting your MetaMask wallet.
+          </p>
+        </div>
+      )}
+      <h1 className="text-3xl font-bold text-primary-purple mb-8 text-center">Your Dashboard</h1>
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6 mb-8">
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Total XP</CardTitle>
+            <Award className="h-4 w-4 text-primary-blue" />
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{stats.total_xp}</div>
+            <p className="text-xs text-gray-500 dark:text-gray-400">Accumulated experience points</p>
+          </CardContent>
+        </Card>
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Courses Completed</CardTitle>
+            <BookOpen className="h-4 w-4 text-primary-purple" />
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{stats.courses_completed}</div>
+            <p className="text-xs text-gray-500 dark:text-gray-400">Courses you've finished</p>
+          </CardContent>
+        </Card>
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Problems Solved</CardTitle>
+            <Code className="h-4 w-4 text-primary-blue" />
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{stats.coding_problems_solved}</div>
+            <p className="text-xs text-gray-500 dark:text-gray-400">Coding challenges mastered</p>
+          </CardContent>
+        </Card>
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Quiz Accuracy</CardTitle>
+            <CheckCircle2 className="h-4 w-4 text-primary-purple" />
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{stats.quiz_accuracy.toFixed(1)}%</div>
+            <p className="text-xs text-gray-500 dark:text-gray-400">Overall quiz performance</p>
+          </CardContent>
+        </Card>
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+            <CardTitle className="text-sm font-medium">Coding Streak</CardTitle>
+            <TrendingUp className="h-4 w-4 text-primary-blue" />
+          </CardHeader>
+          <CardContent>
+            <div className="text-2xl font-bold">{stats.coding_streak} days</div>
+            <p className="text-xs text-gray-500 dark:text-gray-400">Consecutive days coding</p>
+          </CardContent>
+        </Card>
+      </div>
+
+      <h2 className="text-2xl font-bold text-primary-purple mb-6 text-center">Activity Heatmap (Coming Soon)</h2>
+      <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100 mb-8">
+        <CardContent className="h-48 flex items-center justify-center text-gray-500 dark:text-gray-400">
+          <p>Interactive activity heatmap visualization will appear here.</p>
+        </CardContent>
+      </Card>
+
+      <h2 className="text-2xl font-bold text-primary-purple mb-6 text-center">
+        Strengths/Weaknesses & Leaderboard (Coming Soon)
+      </h2>
+      <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardContent className="h-48 flex items-center justify-center text-gray-500 dark:text-gray-400">
+            <p>Radar chart for strengths/weaknesses will appear here.</p>
+          </CardContent>
+        </Card>
+        <Card className="bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardContent className="h-48 flex items-center justify-center text-gray-500 dark:text-gray-400">
+            <p>Global leaderboard will appear here.</p>
+          </CardContent>
+        </Card>
+      </div>
+    </div>
+  )
+}

frontend/components/feedback-panel.tsx

@@ -0,0 +1,78 @@
+"use client"
+
+import type { Feedback, Question } from "@/lib/types"
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"
+import { Badge } from "@/components/ui/badge"
+import { Progress } from "@/components/ui/progress"
+import { Button } from "@/components/ui/button"
+import { CheckCircle2, XCircle } from "lucide-react"
+
+interface FeedbackPanelProps {
+  feedback: Feedback
+  nextQuestion: Question | null
+  testCompleted: boolean
+  onContinue: () => void
+  onStartNewTest: () => void
+}
+
+export function FeedbackPanel({
+  feedback,
+  nextQuestion,
+  testCompleted,
+  onContinue,
+  onStartNewTest,
+}: FeedbackPanelProps) {
+  return (
+    <Card className="w-full max-w-2xl mx-auto bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+      <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+        <CardTitle className="text-xl font-semibold text-gray-800 dark:text-gray-100">Feedback</CardTitle>
+        {feedback.correct ? (
+          <Badge className="bg-success text-white flex items-center gap-1">
+            <CheckCircle2 className="h-4 w-4" /> Correct
+          </Badge>
+        ) : (
+          <Badge className="bg-destructive text-white flex items-center gap-1">
+            <XCircle className="h-4 w-4" /> Incorrect
+          </Badge>
+        )}
+      </CardHeader>
+      <CardContent className="space-y-4">
+        <div className="space-y-2">
+          <p className="text-sm font-medium text-gray-700 dark:text-gray-300">
+            Confidence Score: {Math.round(feedback.confidence_score * 100)}%
+          </p>
+          <Progress
+            value={feedback.confidence_score * 100}
+            className="h-2"
+            indicatorClassName={
+              feedback.confidence_score > 0.7
+                ? "bg-success"
+                : feedback.confidence_score > 0.4
+                  ? "bg-warning"
+                  : "bg-destructive"
+            }
+          />
+        </div>
+        {feedback.correct_answer && (
+          <div className="text-sm text-gray-700 dark:text-gray-200">
+            <span className="font-semibold">Correct Answer:</span> {feedback.correct_answer}
+          </div>
+        )}
+        <div className="text-sm text-gray-700 dark:text-gray-200">
+          <span className="font-semibold">Explanation:</span> {feedback.explanation}
+        </div>
+      </CardContent>
+      <CardFooter className="flex justify-end">
+        {testCompleted ? (
+          <Button onClick={onStartNewTest} className="bg-primary-blue hover:bg-primary-blue/90 text-white">
+            Start New Test
+          </Button>
+        ) : (
+          <Button onClick={onContinue} className="bg-primary-purple hover:bg-primary-purple/90 text-white">
+            Next Question
+          </Button>
+        )}
+      </CardFooter>
+    </Card>
+  )
+}

frontend/components/lesson-viewer.tsx

@@ -0,0 +1,162 @@
+"use client"
+
+import Link from "next/link"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import type { Lesson } from "@/lib/types"
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"
+import { Button } from "@/components/ui/button"
+import { Loader2 } from "lucide-react"
+import ReactMarkdown from "react-markdown"
+import { api } from "@/lib/api"
+
+interface LessonViewerProps {
+  courseId: string
+  lessonId: string
+}
+
+export function LessonViewer({ courseId, lessonId }: LessonViewerProps) {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Check token for access
+  const router = useRouter()
+  const [lesson, setLesson] = useState<Lesson | null>(null)
+  const [isLoadingLesson, setIsLoadingLesson] = useState(true)
+  const [isMarkingCompleted, setIsMarkingCompleted] = useState(false)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view lessons.")
+      router.push("/")
+      return
+    }
+
+    const fetchLesson = async () => {
+      setIsLoadingLesson(true)
+      setError(null)
+      try {
+        const response = await api.get<Lesson>(`/api/courses/${courseId}/lessons/${lessonId}`)
+        setLesson(response.data)
+      } catch (err: any) {
+        console.error("Failed to fetch lesson:", err)
+        setError(err.response?.data?.message || "Failed to load lesson.")
+        toast.error(err.response?.data?.message || "Failed to load lesson.")
+      } finally {
+        setIsLoadingLesson(false)
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Only fetch if either user type is logged in
+      fetchLesson()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, courseId, lessonId, token])
+
+  const markLessonCompleted = async () => {
+    if (!lesson || lesson.completed || !token) {
+      toast.error("Please connect your MetaMask wallet to mark lessons as completed.")
+      return // Ensure token exists for this action
+    }
+    setIsMarkingCompleted(true)
+    try {
+      await api.post(`/api/courses/${courseId}/lessons/${lessonId}/complete`)
+      setLesson((prev) => (prev ? { ...prev, completed: true } : null))
+      toast.success("Lesson marked as completed!")
+    } catch (err: any) {
+      console.error("Failed to mark lesson completed:", err)
+      toast.error(err.response?.data?.message || "Failed to mark lesson completed.")
+    } finally {
+      setIsMarkingCompleted(false)
+    }
+  }
+
+  if (isLoadingAuth || isLoadingLesson) {
+    return (
+      <div className="flex justify-center items-center flex-1">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading lesson...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center flex-1 text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (!lesson) {
+    return (
+      <div className="flex justify-center items-center flex-1 text-gray-600 dark:text-gray-300">
+        <p className="text-xl">Lesson not found.</p>
+      </div>
+    )
+  }
+
+  return (
+    <Card className="flex-1 bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+      <CardHeader>
+        <CardTitle className="text-2xl font-bold text-primary-purple">{lesson.title}</CardTitle>
+      </CardHeader>
+      <CardContent className="space-y-6">
+        {authMethod === "firebase" && !token && (
+          <div className="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4 rounded-md dark:bg-yellow-900 dark:border-yellow-600 dark:text-yellow-200">
+            <p className="font-bold">Limited Access</p>
+            <p>
+              You are logged in with email. Full functionality, including progress tracking and data persistence,
+              requires connecting your MetaMask wallet.
+            </p>
+          </div>
+        )}
+        {lesson.type === "video" && (
+          <div className="aspect-video w-full bg-gray-200 dark:bg-gray-700 rounded-md flex items-center justify-center text-gray-500">
+            <p>Video Player Placeholder: {lesson.content}</p>
+            {/* In a real app, you'd embed a video player here */}
+          </div>
+        )}
+        {lesson.type === "text" && (
+          <div className="prose dark:prose-invert max-w-none">
+            <ReactMarkdown>{lesson.content}</ReactMarkdown>
+          </div>
+        )}
+        {lesson.type === "code" && (
+          <div className="bg-gray-900 text-white p-4 rounded-md font-mono text-sm overflow-x-auto">
+            <pre>
+              <code>{lesson.content}</code>
+            </pre>
+          </div>
+        )}
+        {lesson.type === "quiz" && (
+          <div className="bg-blue-50 dark:bg-blue-900 p-4 rounded-md text-primary-blue dark:text-blue-200">
+            <p className="font-semibold">Quiz Link:</p>
+            <Link href={`/quizzes/${lesson.content}`} className="underline hover:no-underline">
+              Start Quiz: {lesson.content}
+            </Link>
+          </div>
+        )}
+      </CardContent>
+      <CardFooter className="flex justify-end">
+        {!lesson.completed && (
+          <Button
+            onClick={markLessonCompleted}
+            disabled={isMarkingCompleted || !token} // Disable if no token
+            className="bg-primary-purple hover:bg-primary-purple/90 text-white"
+          >
+            {isMarkingCompleted && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+            Mark as Completed
+          </Button>
+        )}
+        {lesson.completed && (
+          <Button disabled variant="outline" className="text-success border-success bg-transparent">
+            Completed
+          </Button>
+        )}
+      </CardFooter>
+    </Card>
+  )
+}

frontend/components/metamask-connect.tsx

@@ -0,0 +1,30 @@
+"use client"
+
+import { useAuth } from "@/context/auth-context"
+import { Button } from "@/components/ui/button"
+import { Loader2 } from "lucide-react"
+
+export function MetaMaskConnect() {
+  const { user, isLoadingAuth, connectWallet, logout } = useAuth()
+
+  return (
+    <div className="flex items-center gap-4">
+      {user ? (
+        <>
+          <span className="text-sm text-gray-600 dark:text-gray-300">
+            Connected: {user.wallet_address.slice(0, 6)}...
+            {user.wallet_address.slice(-4)}
+          </span>
+          <Button onClick={logout} variant="outline" disabled={isLoadingAuth}>
+            Logout
+          </Button>
+        </>
+      ) : (
+        <Button onClick={connectWallet} disabled={isLoadingAuth}>
+          {isLoadingAuth && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+          Connect Wallet
+        </Button>
+      )}
+    </div>
+  )
+}

frontend/components/progress-tracker.tsx

@@ -0,0 +1,22 @@
+import { Progress } from "@/components/ui/progress"
+
+interface ProgressTrackerProps {
+  currentQuestionNumber: number
+  totalQuestions: number
+}
+
+export function ProgressTracker({ currentQuestionNumber, totalQuestions }: ProgressTrackerProps) {
+  const progressValue = (currentQuestionNumber / totalQuestions) * 100
+
+  return (
+    <div className="w-full space-y-2">
+      <div className="flex justify-between text-sm font-medium text-gray-700 dark:text-gray-300">
+        <span>
+          Question {currentQuestionNumber} of {totalQuestions}
+        </span>
+        <span>{Math.round(progressValue)}%</span>
+      </div>
+      <Progress value={progressValue} className="h-2 bg-primary-blue" />
+    </div>
+  )
+}

frontend/components/question-card.tsx

@@ -0,0 +1,64 @@
+"use client"
+
+import { useState } from "react"
+import type { Question, QuestionOption } from "@/lib/types"
+import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "@/components/ui/card"
+import { Button } from "@/components/ui/button"
+import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group"
+import { Label } from "@/components/ui/label"
+import { Loader2 } from "lucide-react"
+
+interface QuestionCardProps {
+  question: Question
+  onAnswerSubmit: (questionId: string, answerIndex: number) => void
+  isLoading: boolean
+}
+
+export function QuestionCard({ question, onAnswerSubmit, isLoading }: QuestionCardProps) {
+  const [selectedOptionIndex, setSelectedOptionIndex] = useState<number | null>(null)
+
+  const handleSubmit = () => {
+    if (selectedOptionIndex !== null) {
+      onAnswerSubmit(question.id, selectedOptionIndex)
+      setSelectedOptionIndex(null) // Reset selection after submission
+    }
+  }
+
+  return (
+    <Card className="w-full max-w-2xl mx-auto bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+      <CardHeader>
+        <CardTitle className="text-xl font-semibold text-gray-800 dark:text-gray-100">Question {question.id}</CardTitle>
+      </CardHeader>
+      <CardContent className="space-y-6">
+        <p className="text-lg text-gray-700 dark:text-gray-200">{question.text}</p>
+        <RadioGroup
+          onValueChange={(value) => setSelectedOptionIndex(Number.parseInt(value))}
+          value={selectedOptionIndex !== null ? String(selectedOptionIndex) : ""}
+          className="space-y-3"
+        >
+          {question.options.map((option: QuestionOption, index: number) => (
+            <div key={option.id} className="flex items-center space-x-3">
+              <RadioGroupItem value={String(index)} id={`option-${option.id}`} disabled={isLoading} />
+              <Label
+                htmlFor={`option-${option.id}`}
+                className="text-base text-gray-700 dark:text-gray-200 cursor-pointer"
+              >
+                {option.text}
+              </Label>
+            </div>
+          ))}
+        </RadioGroup>
+      </CardContent>
+      <CardFooter className="flex justify-end">
+        <Button
+          onClick={handleSubmit}
+          disabled={selectedOptionIndex === null || isLoading}
+          className="bg-primary-purple hover:bg-primary-purple/90 text-white"
+        >
+          {isLoading && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+          Submit Answer
+        </Button>
+      </CardFooter>
+    </Card>
+  )
+}

frontend/components/quiz-list.tsx

@@ -0,0 +1,138 @@
+"use client"
+
+import { Progress } from "@/components/ui/progress"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import type { Quiz } from "@/lib/types"
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
+import { Badge } from "@/components/ui/badge"
+import { Button } from "@/components/ui/button"
+import Link from "next/link"
+import { Loader2 } from "lucide-react"
+import api from "@/lib/api" // Import api
+
+export function QuizList() {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Check token for access
+  const router = useRouter()
+  const [quizzes, setQuizzes] = useState<Quiz[]>([])
+  const [isLoadingQuizzes, setIsLoadingQuizzes] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      // Allow either MetaMask or Firebase user
+      toast.error("Please login to view quizzes.")
+      router.push("/")
+      return
+    }
+
+    const fetchQuizzes = async () => {
+      setIsLoadingQuizzes(true)
+      setError(null)
+      try {
+        // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+        const response = await api.get<Quiz[]>("/api/quizzes")
+        setQuizzes(response.data)
+        // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+      } catch (err: any) {
+        console.error("Failed to fetch quizzes:", err)
+        setError(err.response?.data?.message || "Failed to load quizzes.")
+        toast.error(err.response?.data?.message || "Failed to load quizzes.")
+      } finally {
+        setIsLoadingQuizzes(false) // Handled by setTimeout
+      }
+    }
+
+    if (user || firebaseUser) {
+      // Fetch if either user type is logged in
+      fetchQuizzes()
+    }
+  }, [user, firebaseUser, isLoadingAuth, router, token])
+
+  const getDifficultyColor = (difficulty: Quiz["difficulty"]) => {
+    switch (difficulty) {
+      case "Easy":
+        return "bg-success text-white"
+      case "Medium":
+        return "bg-warning text-white"
+      case "Hard":
+        return "bg-destructive text-white"
+      default:
+        return "bg-gray-500 text-white"
+    }
+  }
+
+  if (isLoadingAuth || isLoadingQuizzes) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading quizzes...</span>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)] text-red-500">
+        <p>{error}</p>
+      </div>
+    )
+  }
+
+  if (quizzes.length === 0) {
+    return (
+      <div className="flex flex-col items-center justify-center min-h-[calc(100vh-64px)] text-gray-600 dark:text-gray-300">
+        <p className="text-xl mb-4">No quizzes available yet.</p>
+        <p>Check back later for new challenges!</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4">
+      {authMethod === "firebase" && !token && (
+        <div className="bg-yellow-100 border-l-4 border-yellow-500 text-yellow-700 p-4 mb-6 rounded-md dark:bg-yellow-900 dark:border-yellow-600 dark:text-yellow-200">
+          <p className="font-bold">Limited Access</p>
+          <p>
+            You are logged in with email. Full functionality, including quiz progress and persistence, requires
+            connecting your MetaMask wallet.
+          </p>
+        </div>
+      )}
+      <h1 className="text-3xl font-bold text-primary-purple mb-8 text-center">Available Quizzes</h1>
+      <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+        {quizzes.map((quiz) => (
+          <Card
+            key={quiz.id}
+            className="bg-white shadow-md rounded-lg overflow-hidden dark:bg-gray-800 dark:text-gray-100"
+          >
+            <CardHeader>
+              <CardTitle className="text-xl font-semibold">{quiz.title}</CardTitle>
+              <CardDescription className="flex items-center gap-2">
+                <Badge className={getDifficultyColor(quiz.difficulty)}>{quiz.difficulty}</Badge>
+                <Badge variant="secondary">{quiz.topic}</Badge>
+              </CardDescription>
+            </CardHeader>
+            <CardContent className="space-y-4">
+              {quiz.recent_performance !== undefined && (
+                <div className="space-y-2">
+                  <div className="flex justify-between text-sm font-medium text-gray-700 dark:text-gray-300">
+                    <span>Recent Performance</span>
+                    <span>{quiz.recent_performance}%</span>
+                  </div>
+                  <Progress value={quiz.recent_performance} className="h-2" />
+                </div>
+              )}
+              <Link href={`/quizzes/${quiz.id}`}>
+                <Button className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white">Take Quiz</Button>
+              </Link>
+            </CardContent>
+          </Card>
+        ))}
+      </div>
+    </div>
+  )
+}

frontend/components/quiz-runner.tsx

@@ -0,0 +1,269 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import type { Question, Feedback } from "@/lib/types"
+import { QuestionCard } from "./question-card"
+import { FeedbackPanel } from "./feedback-panel"
+import { ProgressTracker } from "./progress-tracker"
+import { Button } from "@/components/ui/button"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Label } from "@/components/ui/label"
+import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group"
+import { Loader2 } from "lucide-react"
+import api from "@/lib/api"
+import type { TestStartRequest, TestStartResponse, TestAnswerRequest, TestAnswerResponse } from "@/lib/types"
+// import { MOCK_QUESTION, MOCK_FEEDBACK_CORRECT } from "@/lib/mock-data" // Import mock data
+
+type QuizState = "subject_selection" | "in_progress" | "showing_feedback" | "completed"
+
+export function QuizRunner({ quizId }: { quizId?: string }) {
+  const { user, firebaseUser, isLoadingAuth, authMethod, token } = useAuth() // Use firebaseUser and authMethod
+  const router = useRouter()
+
+  const [quizState, setQuizState] = useState<QuizState>("subject_selection")
+  const [selectedSubject, setSelectedSubject] = useState<string | null>(null)
+  const [sessionId, setSessionId] = useState<string | null>(null)
+  const [currentQuestion, setCurrentQuestion] = useState<Question | null>(null)
+  const [questionNumber, setQuestionNumber] = useState(0)
+  const [totalQuestions, setTotalQuestions] = useState(0)
+  const [feedback, setFeedback] = useState<Feedback | null>(null)
+  const [isSubmittingAnswer, setIsSubmittingAnswer] = useState(false)
+  const [isStartingQuiz, setIsStartingQuiz] = useState(false)
+
+  const availableSubjects = ["Math", "Science", "History", "Literature"] // Example subjects
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user && !firebaseUser) {
+      toast.error("Please login to take a quiz.")
+      router.push("/") // Redirect to home if not authenticated
+    }
+  }, [user, firebaseUser, isLoadingAuth, router])
+
+  const startQuiz = async () => {
+    if (!selectedSubject) {
+      toast.error("Please select a subject to start the quiz.")
+      return
+    }
+    // --- MOCK DATA IMPLEMENTATION START ---
+    // Remove this block and uncomment the API call below when your backend is ready
+    // setIsStartingQuiz(true)
+    // setTimeout(() => {
+    //   setSessionId("mock-session-123")
+    //   setCurrentQuestion(MOCK_QUESTION)
+    //   setQuestionNumber(1)
+    //   setTotalQuestions(5) // Mock total questions
+    //   setFeedback(null)
+    //   setQuizState("in_progress")
+    //   toast.success(`Mock Quiz started for ${selectedSubject}!`)
+    //   setIsStartingQuiz(false)
+    // }, 1000)
+    // --- MOCK DATA IMPLEMENTATION END ---
+
+    /*
+    // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+    */
+    if (authMethod === "firebase" && !token) {
+      toast.error("Quiz progress and persistence require MetaMask authentication.")
+      return // Prevent API call for Firebase users without JWT
+    }
+
+    setIsStartingQuiz(true)
+    try {
+      const response = await api.post<TestStartResponse>("/api/test/start", {
+        subject: selectedSubject,
+      } as TestStartRequest)
+      setSessionId(response.data.session_id)
+      setCurrentQuestion(response.data.question)
+      setQuestionNumber(response.data.question_number)
+      setTotalQuestions(response.data.total_questions)
+      setFeedback(null)
+      setQuizState("in_progress")
+      toast.success(`Quiz started for ${selectedSubject}!`)
+    } catch (error: any) {
+      console.error("Error starting quiz:", error)
+      toast.error(error.response?.data?.message || "Failed to start quiz.")
+    } finally {
+      setIsStartingQuiz(false)
+    }
+    // */
+  }
+
+  const handleAnswerSubmit = async (questionId: string, answerIndex: number) => {
+    if (!sessionId) {
+      toast.error("No active quiz session found.")
+      return
+    }
+    // --- MOCK DATA IMPLEMENTATION START ---
+    // Remove this block and uncomment the API call below when your backend is ready
+    // setIsSubmittingAnswer(true)
+    // setTimeout(() => {
+    //   const isCorrect = answerIndex === 2 // Mocking 'Paris' as correct answer
+    //   setFeedback(
+    //     isCorrect
+    //       ? MOCK_FEEDBACK_CORRECT
+    //       : {
+    //           ...MOCK_FEEDBACK_CORRECT,
+    //           correct: false,
+    //           explanation: "That's not correct. The capital of France is Paris.",
+    //           confidence_score: 0.2,
+    //           correct_answer: "Paris",
+    //         },
+    //   )
+
+    //   const nextQNum = questionNumber + 1
+    //   if (nextQNum > totalQuestions) {
+    //     setCurrentQuestion(null)
+    //     setQuizState("completed")
+    //     toast.success("Mock Quiz completed!")
+    //   } else {
+    //     setCurrentQuestion({ ...MOCK_QUESTION, id: `q${nextQNum}`, text: `Mock Question ${nextQNum}` }) // Simulate next question
+    //     setQuestionNumber(nextQNum)
+    //     setQuizState("showing_feedback")
+    //   }
+    //   setIsSubmittingAnswer(false)
+    // }, 1000)
+    // --- MOCK DATA IMPLEMENTATION END ---
+
+    /*
+    // --- ORIGINAL API CALL (UNCOMMENT WHEN BACKEND IS READY) ---
+    */
+    if (authMethod === "firebase" && !token) {
+      toast.error("Quiz progress and persistence require MetaMask authentication.")
+      return // Prevent API call for Firebase users without JWT
+    }
+
+    setIsSubmittingAnswer(true)
+    try {
+      const response = await api.post<TestAnswerResponse>("/api/test/answer", {
+        session_id: sessionId,
+        question_id: questionId,
+        answer: answerIndex,
+      } as TestAnswerRequest)
+      setFeedback(response.data.feedback)
+      setCurrentQuestion(response.data.next_question)
+      // Only increment if not the last question, or if backend sends next_question as null for last
+      if (!response.data.test_completed) {
+        setQuestionNumber((prev) => prev + 1)
+      }
+      if (response.data.test_completed) {
+        setQuizState("completed")
+        toast.success("Quiz completed!")
+      } else {
+        setQuizState("showing_feedback")
+      }
+    } catch (error: any) {
+      console.error("Error submitting answer:", error)
+      toast.error(error.response?.data?.message || "Failed to submit answer.")
+    } finally {
+      setIsSubmittingAnswer(false)
+    }
+    // */
+  }
+
+  const handleContinue = () => {
+    if (currentQuestion) {
+      setQuizState("in_progress")
+      setFeedback(null)
+    } else {
+      setQuizState("completed")
+    }
+  }
+
+  const handleStartNewQuiz = () => {
+    setQuizState("subject_selection")
+    setSelectedSubject(null)
+    setSessionId(null)
+    setCurrentQuestion(null)
+    setQuestionNumber(0)
+    setTotalQuestions(0)
+    setFeedback(null)
+  }
+
+  if (isLoadingAuth || (!user && !firebaseUser)) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading authentication...</span>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4 min-h-[calc(100vh-64px)] flex flex-col items-center justify-center">
+      {quizState === "subject_selection" && (
+        <Card className="w-full max-w-md bg-white shadow-md rounded-lg p-6 dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader>
+            <CardTitle className="text-2xl font-bold text-primary-purple">Select a Quiz Subject</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-6">
+            <RadioGroup onValueChange={setSelectedSubject} value={selectedSubject || ""} className="space-y-3">
+              {availableSubjects.map((subject) => (
+                <div key={subject} className="flex items-center space-x-3">
+                  <RadioGroupItem value={subject} id={`subject-${subject}`} />
+                  <Label
+                    htmlFor={`subject-${subject}`}
+                    className="text-base text-gray-700 dark:text-gray-200 cursor-pointer"
+                  >
+                    {subject}
+                  </Label>
+                </div>
+              ))}
+            </RadioGroup>
+            <Button
+              onClick={startQuiz}
+              disabled={!selectedSubject || isStartingQuiz}
+              className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white"
+            >
+              {isStartingQuiz && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+              Start Quiz
+            </Button>
+            {authMethod === "firebase" && !token && (
+              <p className="text-sm text-center text-warning dark:text-warning/80 mt-4">
+                Note: Quiz progress will not be saved without MetaMask authentication.
+              </p>
+            )}
+          </CardContent>
+        </Card>
+      )}
+
+      {(quizState === "in_progress" || quizState === "showing_feedback") && questionNumber <= totalQuestions && (
+        <div className="w-full max-w-2xl space-y-6">
+          <ProgressTracker currentQuestionNumber={questionNumber} totalQuestions={totalQuestions} />
+          {quizState === "in_progress" && currentQuestion && (
+            <QuestionCard
+              question={currentQuestion}
+              onAnswerSubmit={handleAnswerSubmit}
+              isLoading={isSubmittingAnswer}
+            />
+          )}
+          {quizState === "showing_feedback" && feedback && (
+            <FeedbackPanel
+              feedback={feedback}
+              nextQuestion={currentQuestion}
+              testCompleted={!currentQuestion} // If currentQuestion is null, test is completed
+              onContinue={handleContinue}
+              onStartNewTest={handleStartNewQuiz}
+            />
+          )}
+        </div>
+      )}
+
+      {quizState === "completed" && (
+        <Card className="w-full max-w-md bg-white shadow-md rounded-lg p-6 text-center dark:bg-gray-800 dark:text-gray-100">
+          <CardHeader>
+            <CardTitle className="text-2xl font-bold text-primary-purple">Quiz Completed!</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <p className="text-lg text-gray-700 dark:text-gray-200">You have successfully completed the quiz.</p>
+            <Button onClick={handleStartNewQuiz} className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white">
+              Take Another Quiz
+            </Button>
+          </CardContent>
+        </Card>
+      )}
+    </div>
+  )
+}

frontend/components/solution-tabs.tsx

@@ -0,0 +1,47 @@
+"use client"
+
+import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
+import { Card, CardContent } from "@/components/ui/card"
+import ReactMarkdown from "react-markdown"
+
+interface SolutionTabsProps {
+  problemDescription: string
+  testCases: { input: string; expected_output: string }[]
+}
+
+export function SolutionTabs({ problemDescription, testCases }: SolutionTabsProps) {
+  return (
+    <Tabs defaultValue="description" className="w-full">
+      <TabsList className="grid w-full grid-cols-2">
+        <TabsTrigger value="description">Description</TabsTrigger>
+        <TabsTrigger value="test-cases">Test Cases</TabsTrigger>
+      </TabsList>
+      <TabsContent value="description">
+        <Card className="dark:bg-gray-800 dark:text-gray-100">
+          <CardContent className="p-6 prose dark:prose-invert max-w-none">
+            <ReactMarkdown>{problemDescription}</ReactMarkdown>
+          </CardContent>
+        </Card>
+      </TabsContent>
+      <TabsContent value="test-cases">
+        <Card className="dark:bg-gray-800 dark:text-gray-100">
+          <CardContent className="p-6 space-y-4">
+            {testCases.map((tc, index) => (
+              <div key={index} className="bg-gray-50 dark:bg-gray-700 p-4 rounded-md">
+                <h4 className="font-semibold text-gray-800 dark:text-gray-100">Test Case {index + 1}</h4>
+                <p className="text-sm text-gray-700 dark:text-gray-200">
+                  <span className="font-medium">Input:</span>{" "}
+                  <code className="bg-gray-200 dark:bg-gray-600 px-1 rounded">{tc.input}</code>
+                </p>
+                <p className="text-sm text-gray-700 dark:text-gray-200">
+                  <span className="font-medium">Expected Output:</span>{" "}
+                  <code className="bg-gray-200 dark:bg-gray-600 px-1 rounded">{tc.expected_output}</code>
+                </p>
+              </div>
+            ))}
+          </CardContent>
+        </Card>
+      </TabsContent>
+    </Tabs>
+  )
+}

frontend/components/test-results-panel.tsx

@@ -0,0 +1,64 @@
+import type { CodeExecutionResult } from "@/lib/types"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Badge } from "@/components/ui/badge"
+import { CheckCircle2, XCircle, Clock } from "lucide-react"
+
+interface TestResultsPanelProps {
+  results: CodeExecutionResult | null
+  isLoading: boolean
+}
+
+export function TestResultsPanel({ results, isLoading }: TestResultsPanelProps) {
+  if (isLoading) {
+    return (
+      <Card className="bg-white shadow-md rounded-lg p-4 dark:bg-gray-800 dark:text-gray-100">
+        <CardContent className="flex items-center justify-center h-24">
+          <p className="text-gray-500 dark:text-gray-400">Running tests...</p>
+        </CardContent>
+      </Card>
+    )
+  }
+
+  if (!results) {
+    return null
+  }
+
+  return (
+    <Card className="bg-white shadow-md rounded-lg p-4 dark:bg-gray-800 dark:text-gray-100">
+      <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+        <CardTitle className="text-xl font-semibold">Test Results</CardTitle>
+        {results.correct ? (
+          <Badge className="bg-success text-white flex items-center gap-1">
+            <CheckCircle2 className="h-4 w-4" /> Correct
+          </Badge>
+        ) : (
+          <Badge className="bg-destructive text-white flex items-center gap-1">
+            <XCircle className="h-4 w-4" /> Incorrect
+          </Badge>
+        )}
+      </CardHeader>
+      <CardContent className="space-y-4 text-sm">
+        <div className="flex items-center gap-2 text-gray-700 dark:text-gray-200">
+          <Clock className="h-4 w-4" />
+          <span>Runtime: {results.runtime.toFixed(2)} ms</span>
+        </div>
+        {results.output && (
+          <div>
+            <h3 className="font-semibold mb-1">Output:</h3>
+            <pre className="bg-gray-100 dark:bg-gray-700 p-3 rounded-md overflow-x-auto text-gray-800 dark:text-gray-200">
+              <code>{results.output}</code>
+            </pre>
+          </div>
+        )}
+        {results.error && (
+          <div>
+            <h3 className="font-semibold mb-1 text-destructive">Error:</h3>
+            <pre className="bg-red-50 dark:bg-red-950 p-3 rounded-md overflow-x-auto text-destructive dark:text-red-200">
+              <code>{results.error}</code>
+            </pre>
+          </div>
+        )}
+      </CardContent>
+    </Card>
+  )
+}

frontend/components/testing-session.tsx

@@ -0,0 +1,203 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { useAuth } from "@/context/auth-context"
+import { useRouter } from "next/navigation"
+import { toast } from "react-hot-toast"
+import api from "@/lib/api"
+import type {
+  Question,
+  Feedback,
+  TestStartRequest,
+  TestStartResponse,
+  TestAnswerRequest,
+  TestAnswerResponse,
+} from "@/lib/types"
+import { QuestionCard } from "./question-card"
+import { FeedbackPanel } from "./feedback-panel"
+import { ProgressTracker } from "./progress-tracker"
+import { Button } from "@/components/ui/button"
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
+import { Label } from "@/components/ui/label"
+import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group"
+import { Loader2 } from "lucide-react"
+
+type TestState = "subject_selection" | "in_progress" | "showing_feedback" | "completed"
+
+export function TestingSession() {
+  const { user, isLoadingAuth } = useAuth()
+  const router = useRouter()
+
+  const [testState, setTestState] = useState<TestState>("subject_selection")
+  const [selectedSubject, setSelectedSubject] = useState<string | null>(null)
+  const [sessionId, setSessionId] = useState<string | null>(null)
+  const [currentQuestion, setCurrentQuestion] = useState<Question | null>(null)
+  const [questionNumber, setQuestionNumber] = useState(0)
+  const [totalQuestions, setTotalQuestions] = useState(0)
+  const [feedback, setFeedback] = useState<Feedback | null>(null)
+  const [isSubmittingAnswer, setIsSubmittingAnswer] = useState(false)
+  const [isStartingTest, setIsStartingTest] = useState(false)
+
+  const availableSubjects = ["Math", "Science", "History", "Literature"] // Example subjects
+
+  useEffect(() => {
+    if (!isLoadingAuth && !user) {
+      toast.error("Please connect your wallet to take a test.")
+      router.push("/") // Redirect to home if not authenticated
+    }
+  }, [user, isLoadingAuth, router])
+
+  const startTest = async () => {
+    if (!selectedSubject) {
+      toast.error("Please select a subject to start the test.")
+      return
+    }
+    setIsStartingTest(true)
+    try {
+      const response = await api.post<TestStartResponse>("/api/test/start", {
+        subject: selectedSubject,
+      } as TestStartRequest)
+      setSessionId(response.data.session_id)
+      setCurrentQuestion(response.data.question)
+      setQuestionNumber(response.data.question_number)
+      setTotalQuestions(response.data.total_questions)
+      setFeedback(null)
+      setTestState("in_progress")
+      toast.success(`Test started for ${selectedSubject}!`)
+    } catch (error: any) {
+      console.error("Error starting test:", error)
+      toast.error(error.response?.data?.message || "Failed to start test.")
+    } finally {
+      setIsStartingTest(false)
+    }
+  }
+
+  const handleAnswerSubmit = async (questionId: string, answerIndex: number) => {
+    if (!sessionId) {
+      toast.error("No active test session found.")
+      return
+    }
+    setIsSubmittingAnswer(true)
+    try {
+      const response = await api.post<TestAnswerResponse>("/api/test/answer", {
+        session_id: sessionId,
+        question_id: questionId,
+        answer: answerIndex,
+      } as TestAnswerRequest)
+      setFeedback(response.data.feedback)
+      setCurrentQuestion(response.data.next_question)
+      setQuestionNumber((prev) => prev + 1) // Increment question number for display
+      if (response.data.test_completed) {
+        setTestState("completed")
+        toast.success("Test completed!")
+      } else {
+        setTestState("showing_feedback")
+      }
+    } catch (error: any) {
+      console.error("Error submitting answer:", error)
+      toast.error(error.response?.data?.message || "Failed to submit answer.")
+    } finally {
+      setIsSubmittingAnswer(false)
+    }
+  }
+
+  const handleContinue = () => {
+    if (currentQuestion) {
+      setTestState("in_progress")
+      setFeedback(null)
+    } else {
+      // This case should ideally not happen if test_completed is true
+      setTestState("completed")
+    }
+  }
+
+  const handleStartNewTest = () => {
+    setTestState("subject_selection")
+    setSelectedSubject(null)
+    setSessionId(null)
+    setCurrentQuestion(null)
+    setQuestionNumber(0)
+    setTotalQuestions(0)
+    setFeedback(null)
+  }
+
+  if (isLoadingAuth || !user) {
+    return (
+      <div className="flex justify-center items-center min-h-[calc(100vh-64px)]">
+        <Loader2 className="h-8 w-8 animate-spin text-primary-purple" />
+        <span className="ml-2 text-lg">Loading authentication...</span>
+      </div>
+    )
+  }
+
+  return (
+    <div className="container mx-auto py-8 px-4 min-h-[calc(100vh-64px)] flex flex-col items-center justify-center">
+      {testState === "subject_selection" && (
+        <Card className="w-full max-w-md bg-white shadow-md rounded-lg p-6">
+          <CardHeader>
+            <CardTitle className="text-2xl font-bold text-primary-purple">Select a Subject</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-6">
+            <RadioGroup onValueChange={setSelectedSubject} value={selectedSubject || ""} className="space-y-3">
+              {availableSubjects.map((subject) => (
+                <div key={subject} className="flex items-center space-x-3">
+                  <RadioGroupItem value={subject} id={`subject-${subject}`} />
+                  <Label
+                    htmlFor={`subject-${subject}`}
+                    className="text-base text-gray-700 dark:text-gray-200 cursor-pointer"
+                  >
+                    {subject}
+                  </Label>
+                </div>
+              ))}
+            </RadioGroup>
+            <Button
+              onClick={startTest}
+              disabled={!selectedSubject || isStartingTest}
+              className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white"
+            >
+              {isStartingTest && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+              Start Test
+            </Button>
+          </CardContent>
+        </Card>
+      )}
+
+      {(testState === "in_progress" || testState === "showing_feedback") && currentQuestion && (
+        <div className="w-full max-w-2xl space-y-6">
+          <ProgressTracker currentQuestionNumber={questionNumber} totalQuestions={totalQuestions} />
+          {testState === "in_progress" && (
+            <QuestionCard
+              question={currentQuestion}
+              onAnswerSubmit={handleAnswerSubmit}
+              isLoading={isSubmittingAnswer}
+            />
+          )}
+          {testState === "showing_feedback" && feedback && (
+            <FeedbackPanel
+              feedback={feedback}
+              nextQuestion={currentQuestion}
+              testCompleted={!currentQuestion} // If currentQuestion is null, test is completed
+              onContinue={handleContinue}
+              onStartNewTest={handleStartNewTest}
+            />
+          )}
+        </div>
+      )}
+
+      {testState === "completed" && (
+        <Card className="w-full max-w-md bg-white shadow-md rounded-lg p-6 text-center">
+          <CardHeader>
+            <CardTitle className="text-2xl font-bold text-primary-purple">Test Completed!</CardTitle>
+          </CardHeader>
+          <CardContent className="space-y-4">
+            <p className="text-lg text-gray-700 dark:text-gray-200">You have successfully completed the test.</p>
+            <Button onClick={handleStartNewTest} className="w-full bg-primary-blue hover:bg-primary-blue/90 text-white">
+              Take Another Test
+            </Button>
+          </CardContent>
+        </Card>
+      )}
+    </div>
+  )
+}

frontend/components/theme-provider.tsx

@@ -0,0 +1,7 @@
+"use client"
+import { ThemeProvider as NextThemesProvider } from "next-themes"
+import type { ThemeProviderProps } from "next-themes"
+
+export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>
+}

frontend/components/ui/accordion.tsx

@@ -0,0 +1,58 @@
+"use client"
+
+import * as React from "react"
+import * as AccordionPrimitive from "@radix-ui/react-accordion"
+import { ChevronDown } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Accordion = AccordionPrimitive.Root
+
+const AccordionItem = React.forwardRef<
+  React.ElementRef<typeof AccordionPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof AccordionPrimitive.Item>
+>(({ className, ...props }, ref) => (
+  <AccordionPrimitive.Item
+    ref={ref}
+    className={cn("border-b", className)}
+    {...props}
+  />
+))
+AccordionItem.displayName = "AccordionItem"
+
+const AccordionTrigger = React.forwardRef<
+  React.ElementRef<typeof AccordionPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof AccordionPrimitive.Trigger>
+>(({ className, children, ...props }, ref) => (
+  <AccordionPrimitive.Header className="flex">
+    <AccordionPrimitive.Trigger
+      ref={ref}
+      className={cn(
+        "flex flex-1 items-center justify-between py-4 font-medium transition-all hover:underline [&[data-state=open]>svg]:rotate-180",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      <ChevronDown className="h-4 w-4 shrink-0 transition-transform duration-200" />
+    </AccordionPrimitive.Trigger>
+  </AccordionPrimitive.Header>
+))
+AccordionTrigger.displayName = AccordionPrimitive.Trigger.displayName
+
+const AccordionContent = React.forwardRef<
+  React.ElementRef<typeof AccordionPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof AccordionPrimitive.Content>
+>(({ className, children, ...props }, ref) => (
+  <AccordionPrimitive.Content
+    ref={ref}
+    className="overflow-hidden text-sm transition-all data-[state=closed]:animate-accordion-up data-[state=open]:animate-accordion-down"
+    {...props}
+  >
+    <div className={cn("pb-4 pt-0", className)}>{children}</div>
+  </AccordionPrimitive.Content>
+))
+
+AccordionContent.displayName = AccordionPrimitive.Content.displayName
+
+export { Accordion, AccordionItem, AccordionTrigger, AccordionContent }

frontend/components/ui/alert-dialog.tsx

@@ -0,0 +1,141 @@
+"use client"
+
+import * as React from "react"
+import * as AlertDialogPrimitive from "@radix-ui/react-alert-dialog"
+
+import { cn } from "@/lib/utils"
+import { buttonVariants } from "@/components/ui/button"
+
+const AlertDialog = AlertDialogPrimitive.Root
+
+const AlertDialogTrigger = AlertDialogPrimitive.Trigger
+
+const AlertDialogPortal = AlertDialogPrimitive.Portal
+
+const AlertDialogOverlay = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Overlay
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80  data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+    ref={ref}
+  />
+))
+AlertDialogOverlay.displayName = AlertDialogPrimitive.Overlay.displayName
+
+const AlertDialogContent = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Content>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPortal>
+    <AlertDialogOverlay />
+    <AlertDialogPrimitive.Content
+      ref={ref}
+      className={cn(
+        "fixed left-[50%] top-[50%] z-50 grid w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] sm:rounded-lg",
+        className
+      )}
+      {...props}
+    />
+  </AlertDialogPortal>
+))
+AlertDialogContent.displayName = AlertDialogPrimitive.Content.displayName
+
+const AlertDialogHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col space-y-2 text-center sm:text-left",
+      className
+    )}
+    {...props}
+  />
+)
+AlertDialogHeader.displayName = "AlertDialogHeader"
+
+const AlertDialogFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      className
+    )}
+    {...props}
+  />
+)
+AlertDialogFooter.displayName = "AlertDialogFooter"
+
+const AlertDialogTitle = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Title
+    ref={ref}
+    className={cn("text-lg font-semibold", className)}
+    {...props}
+  />
+))
+AlertDialogTitle.displayName = AlertDialogPrimitive.Title.displayName
+
+const AlertDialogDescription = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+AlertDialogDescription.displayName =
+  AlertDialogPrimitive.Description.displayName
+
+const AlertDialogAction = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Action>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Action>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Action
+    ref={ref}
+    className={cn(buttonVariants(), className)}
+    {...props}
+  />
+))
+AlertDialogAction.displayName = AlertDialogPrimitive.Action.displayName
+
+const AlertDialogCancel = React.forwardRef<
+  React.ElementRef<typeof AlertDialogPrimitive.Cancel>,
+  React.ComponentPropsWithoutRef<typeof AlertDialogPrimitive.Cancel>
+>(({ className, ...props }, ref) => (
+  <AlertDialogPrimitive.Cancel
+    ref={ref}
+    className={cn(
+      buttonVariants({ variant: "outline" }),
+      "mt-2 sm:mt-0",
+      className
+    )}
+    {...props}
+  />
+))
+AlertDialogCancel.displayName = AlertDialogPrimitive.Cancel.displayName
+
+export {
+  AlertDialog,
+  AlertDialogPortal,
+  AlertDialogOverlay,
+  AlertDialogTrigger,
+  AlertDialogContent,
+  AlertDialogHeader,
+  AlertDialogFooter,
+  AlertDialogTitle,
+  AlertDialogDescription,
+  AlertDialogAction,
+  AlertDialogCancel,
+}

frontend/components/ui/alert.tsx

@@ -0,0 +1,59 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const alertVariants = cva(
+  "relative w-full rounded-lg border p-4 [&>svg~*]:pl-7 [&>svg+div]:translate-y-[-3px] [&>svg]:absolute [&>svg]:left-4 [&>svg]:top-4 [&>svg]:text-foreground",
+  {
+    variants: {
+      variant: {
+        default: "bg-background text-foreground",
+        destructive:
+          "border-destructive/50 text-destructive dark:border-destructive [&>svg]:text-destructive",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+const Alert = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement> & VariantProps<typeof alertVariants>
+>(({ className, variant, ...props }, ref) => (
+  <div
+    ref={ref}
+    role="alert"
+    className={cn(alertVariants({ variant }), className)}
+    {...props}
+  />
+))
+Alert.displayName = "Alert"
+
+const AlertTitle = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLHeadingElement>
+>(({ className, ...props }, ref) => (
+  <h5
+    ref={ref}
+    className={cn("mb-1 font-medium leading-none tracking-tight", className)}
+    {...props}
+  />
+))
+AlertTitle.displayName = "AlertTitle"
+
+const AlertDescription = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn("text-sm [&_p]:leading-relaxed", className)}
+    {...props}
+  />
+))
+AlertDescription.displayName = "AlertDescription"
+
+export { Alert, AlertTitle, AlertDescription }

frontend/components/ui/aspect-ratio.tsx

@@ -0,0 +1,7 @@
+"use client"
+
+import * as AspectRatioPrimitive from "@radix-ui/react-aspect-ratio"
+
+const AspectRatio = AspectRatioPrimitive.Root
+
+export { AspectRatio }

frontend/components/ui/avatar.tsx

@@ -0,0 +1,50 @@
+"use client"
+
+import * as React from "react"
+import * as AvatarPrimitive from "@radix-ui/react-avatar"
+
+import { cn } from "@/lib/utils"
+
+const Avatar = React.forwardRef<
+  React.ElementRef<typeof AvatarPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof AvatarPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <AvatarPrimitive.Root
+    ref={ref}
+    className={cn(
+      "relative flex h-10 w-10 shrink-0 overflow-hidden rounded-full",
+      className
+    )}
+    {...props}
+  />
+))
+Avatar.displayName = AvatarPrimitive.Root.displayName
+
+const AvatarImage = React.forwardRef<
+  React.ElementRef<typeof AvatarPrimitive.Image>,
+  React.ComponentPropsWithoutRef<typeof AvatarPrimitive.Image>
+>(({ className, ...props }, ref) => (
+  <AvatarPrimitive.Image
+    ref={ref}
+    className={cn("aspect-square h-full w-full", className)}
+    {...props}
+  />
+))
+AvatarImage.displayName = AvatarPrimitive.Image.displayName
+
+const AvatarFallback = React.forwardRef<
+  React.ElementRef<typeof AvatarPrimitive.Fallback>,
+  React.ComponentPropsWithoutRef<typeof AvatarPrimitive.Fallback>
+>(({ className, ...props }, ref) => (
+  <AvatarPrimitive.Fallback
+    ref={ref}
+    className={cn(
+      "flex h-full w-full items-center justify-center rounded-full bg-muted",
+      className
+    )}
+    {...props}
+  />
+))
+AvatarFallback.displayName = AvatarPrimitive.Fallback.displayName
+
+export { Avatar, AvatarImage, AvatarFallback }

frontend/components/ui/badge.tsx

@@ -0,0 +1,36 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const badgeVariants = cva(
+  "inline-flex items-center rounded-full border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2",
+  {
+    variants: {
+      variant: {
+        default:
+          "border-transparent bg-primary text-primary-foreground hover:bg-primary/80",
+        secondary:
+          "border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        destructive:
+          "border-transparent bg-destructive text-destructive-foreground hover:bg-destructive/80",
+        outline: "text-foreground",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+export interface BadgeProps
+  extends React.HTMLAttributes<HTMLDivElement>,
+    VariantProps<typeof badgeVariants> {}
+
+function Badge({ className, variant, ...props }: BadgeProps) {
+  return (
+    <div className={cn(badgeVariants({ variant }), className)} {...props} />
+  )
+}
+
+export { Badge, badgeVariants }

frontend/components/ui/breadcrumb.tsx

@@ -0,0 +1,115 @@
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { ChevronRight, MoreHorizontal } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Breadcrumb = React.forwardRef<
+  HTMLElement,
+  React.ComponentPropsWithoutRef<"nav"> & {
+    separator?: React.ReactNode
+  }
+>(({ ...props }, ref) => <nav ref={ref} aria-label="breadcrumb" {...props} />)
+Breadcrumb.displayName = "Breadcrumb"
+
+const BreadcrumbList = React.forwardRef<
+  HTMLOListElement,
+  React.ComponentPropsWithoutRef<"ol">
+>(({ className, ...props }, ref) => (
+  <ol
+    ref={ref}
+    className={cn(
+      "flex flex-wrap items-center gap-1.5 break-words text-sm text-muted-foreground sm:gap-2.5",
+      className
+    )}
+    {...props}
+  />
+))
+BreadcrumbList.displayName = "BreadcrumbList"
+
+const BreadcrumbItem = React.forwardRef<
+  HTMLLIElement,
+  React.ComponentPropsWithoutRef<"li">
+>(({ className, ...props }, ref) => (
+  <li
+    ref={ref}
+    className={cn("inline-flex items-center gap-1.5", className)}
+    {...props}
+  />
+))
+BreadcrumbItem.displayName = "BreadcrumbItem"
+
+const BreadcrumbLink = React.forwardRef<
+  HTMLAnchorElement,
+  React.ComponentPropsWithoutRef<"a"> & {
+    asChild?: boolean
+  }
+>(({ asChild, className, ...props }, ref) => {
+  const Comp = asChild ? Slot : "a"
+
+  return (
+    <Comp
+      ref={ref}
+      className={cn("transition-colors hover:text-foreground", className)}
+      {...props}
+    />
+  )
+})
+BreadcrumbLink.displayName = "BreadcrumbLink"
+
+const BreadcrumbPage = React.forwardRef<
+  HTMLSpanElement,
+  React.ComponentPropsWithoutRef<"span">
+>(({ className, ...props }, ref) => (
+  <span
+    ref={ref}
+    role="link"
+    aria-disabled="true"
+    aria-current="page"
+    className={cn("font-normal text-foreground", className)}
+    {...props}
+  />
+))
+BreadcrumbPage.displayName = "BreadcrumbPage"
+
+const BreadcrumbSeparator = ({
+  children,
+  className,
+  ...props
+}: React.ComponentProps<"li">) => (
+  <li
+    role="presentation"
+    aria-hidden="true"
+    className={cn("[&>svg]:w-3.5 [&>svg]:h-3.5", className)}
+    {...props}
+  >
+    {children ?? <ChevronRight />}
+  </li>
+)
+BreadcrumbSeparator.displayName = "BreadcrumbSeparator"
+
+const BreadcrumbEllipsis = ({
+  className,
+  ...props
+}: React.ComponentProps<"span">) => (
+  <span
+    role="presentation"
+    aria-hidden="true"
+    className={cn("flex h-9 w-9 items-center justify-center", className)}
+    {...props}
+  >
+    <MoreHorizontal className="h-4 w-4" />
+    <span className="sr-only">More</span>
+  </span>
+)
+BreadcrumbEllipsis.displayName = "BreadcrumbElipssis"
+
+export {
+  Breadcrumb,
+  BreadcrumbList,
+  BreadcrumbItem,
+  BreadcrumbLink,
+  BreadcrumbPage,
+  BreadcrumbSeparator,
+  BreadcrumbEllipsis,
+}

frontend/components/ui/button.tsx

@@ -0,0 +1,56 @@
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+  {
+    variants: {
+      variant: {
+        default: "bg-primary text-primary-foreground hover:bg-primary/90",
+        destructive:
+          "bg-destructive text-destructive-foreground hover:bg-destructive/90",
+        outline:
+          "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
+        secondary:
+          "bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        ghost: "hover:bg-accent hover:text-accent-foreground",
+        link: "text-primary underline-offset-4 hover:underline",
+      },
+      size: {
+        default: "h-10 px-4 py-2",
+        sm: "h-9 rounded-md px-3",
+        lg: "h-11 rounded-md px-8",
+        icon: "h-10 w-10",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+export interface ButtonProps
+  extends React.ButtonHTMLAttributes<HTMLButtonElement>,
+    VariantProps<typeof buttonVariants> {
+  asChild?: boolean
+}
+
+const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant, size, asChild = false, ...props }, ref) => {
+    const Comp = asChild ? Slot : "button"
+    return (
+      <Comp
+        className={cn(buttonVariants({ variant, size, className }))}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Button.displayName = "Button"
+
+export { Button, buttonVariants }

frontend/components/ui/calendar.tsx

@@ -0,0 +1,213 @@
+'use client'
+
+import * as React from 'react'
+import {
+  ChevronDownIcon,
+  ChevronLeftIcon,
+  ChevronRightIcon,
+} from 'lucide-react'
+import { DayButton, DayPicker, getDefaultClassNames } from 'react-day-picker'
+
+import { cn } from '@/lib/utils'
+import { Button, buttonVariants } from '@/components/ui/button'
+
+function Calendar({
+  className,
+  classNames,
+  showOutsideDays = true,
+  captionLayout = 'label',
+  buttonVariant = 'ghost',
+  formatters,
+  components,
+  ...props
+}: React.ComponentProps<typeof DayPicker> & {
+  buttonVariant?: React.ComponentProps<typeof Button>['variant']
+}) {
+  const defaultClassNames = getDefaultClassNames()
+
+  return (
+    <DayPicker
+      showOutsideDays={showOutsideDays}
+      className={cn(
+        'bg-background group/calendar p-3 [--cell-size:--spacing(8)] [[data-slot=card-content]_&]:bg-transparent [[data-slot=popover-content]_&]:bg-transparent',
+        String.raw`rtl:**:[.rdp-button\_next>svg]:rotate-180`,
+        String.raw`rtl:**:[.rdp-button\_previous>svg]:rotate-180`,
+        className
+      )}
+      captionLayout={captionLayout}
+      formatters={{
+        formatMonthDropdown: date =>
+          date.toLocaleString('default', { month: 'short' }),
+        ...formatters,
+      }}
+      classNames={{
+        root: cn('w-fit', defaultClassNames.root),
+        months: cn(
+          'flex gap-4 flex-col md:flex-row relative',
+          defaultClassNames.months
+        ),
+        month: cn('flex flex-col w-full gap-4', defaultClassNames.month),
+        nav: cn(
+          'flex items-center gap-1 w-full absolute top-0 inset-x-0 justify-between',
+          defaultClassNames.nav
+        ),
+        button_previous: cn(
+          buttonVariants({ variant: buttonVariant }),
+          'size-[--cell-size] aria-disabled:opacity-50 p-0 select-none',
+          defaultClassNames.button_previous
+        ),
+        button_next: cn(
+          buttonVariants({ variant: buttonVariant }),
+          'size-[--cell-size] aria-disabled:opacity-50 p-0 select-none',
+          defaultClassNames.button_next
+        ),
+        month_caption: cn(
+          'flex items-center justify-center h-[--cell-size] w-full px-[--cell-size]',
+          defaultClassNames.month_caption
+        ),
+        dropdowns: cn(
+          'w-full flex items-center text-sm font-medium justify-center h-[--cell-size] gap-1.5',
+          defaultClassNames.dropdowns
+        ),
+        dropdown_root: cn(
+          'relative has-focus:border-ring border border-input shadow-xs has-focus:ring-ring/50 has-focus:ring-[3px] rounded-md',
+          defaultClassNames.dropdown_root
+        ),
+        dropdown: cn(
+          'absolute bg-popover inset-0 opacity-0',
+          defaultClassNames.dropdown
+        ),
+        caption_label: cn(
+          'select-none font-medium',
+          captionLayout === 'label'
+            ? 'text-sm'
+            : 'rounded-md pl-2 pr-1 flex items-center gap-1 text-sm h-8 [&>svg]:text-muted-foreground [&>svg]:size-3.5',
+          defaultClassNames.caption_label
+        ),
+        table: 'w-full border-collapse',
+        weekdays: cn('flex', defaultClassNames.weekdays),
+        weekday: cn(
+          'text-muted-foreground rounded-md flex-1 font-normal text-[0.8rem] select-none',
+          defaultClassNames.weekday
+        ),
+        week: cn('flex w-full mt-2', defaultClassNames.week),
+        week_number_header: cn(
+          'select-none w-[--cell-size]',
+          defaultClassNames.week_number_header
+        ),
+        week_number: cn(
+          'text-[0.8rem] select-none text-muted-foreground',
+          defaultClassNames.week_number
+        ),
+        day: cn(
+          'relative w-full h-full p-0 text-center [&:first-child[data-selected=true]_button]:rounded-l-md [&:last-child[data-selected=true]_button]:rounded-r-md group/day aspect-square select-none',
+          defaultClassNames.day
+        ),
+        range_start: cn(
+          'rounded-l-md bg-accent',
+          defaultClassNames.range_start
+        ),
+        range_middle: cn('rounded-none', defaultClassNames.range_middle),
+        range_end: cn('rounded-r-md bg-accent', defaultClassNames.range_end),
+        today: cn(
+          'bg-accent text-accent-foreground rounded-md data-[selected=true]:rounded-none',
+          defaultClassNames.today
+        ),
+        outside: cn(
+          'text-muted-foreground aria-selected:text-muted-foreground',
+          defaultClassNames.outside
+        ),
+        disabled: cn(
+          'text-muted-foreground opacity-50',
+          defaultClassNames.disabled
+        ),
+        hidden: cn('invisible', defaultClassNames.hidden),
+        ...classNames,
+      }}
+      components={{
+        Root: ({ className, rootRef, ...props }) => {
+          return (
+            <div
+              data-slot="calendar"
+              ref={rootRef}
+              className={cn(className)}
+              {...props}
+            />
+          )
+        },
+        Chevron: ({ className, orientation, ...props }) => {
+          if (orientation === 'left') {
+            return (
+              <ChevronLeftIcon className={cn('size-4', className)} {...props} />
+            )
+          }
+
+          if (orientation === 'right') {
+            return (
+              <ChevronRightIcon
+                className={cn('size-4', className)}
+                {...props}
+              />
+            )
+          }
+
+          return (
+            <ChevronDownIcon className={cn('size-4', className)} {...props} />
+          )
+        },
+        DayButton: CalendarDayButton,
+        WeekNumber: ({ children, ...props }) => {
+          return (
+            <td {...props}>
+              <div className="flex size-[--cell-size] items-center justify-center text-center">
+                {children}
+              </div>
+            </td>
+          )
+        },
+        ...components,
+      }}
+      {...props}
+    />
+  )
+}
+
+function CalendarDayButton({
+  className,
+  day,
+  modifiers,
+  ...props
+}: React.ComponentProps<typeof DayButton>) {
+  const defaultClassNames = getDefaultClassNames()
+
+  const ref = React.useRef<HTMLButtonElement>(null)
+  React.useEffect(() => {
+    if (modifiers.focused) ref.current?.focus()
+  }, [modifiers.focused])
+
+  return (
+    <Button
+      ref={ref}
+      variant="ghost"
+      size="icon"
+      data-day={day.date.toLocaleDateString()}
+      data-selected-single={
+        modifiers.selected &&
+        !modifiers.range_start &&
+        !modifiers.range_end &&
+        !modifiers.range_middle
+      }
+      data-range-start={modifiers.range_start}
+      data-range-end={modifiers.range_end}
+      data-range-middle={modifiers.range_middle}
+      className={cn(
+        'data-[selected-single=true]:bg-primary data-[selected-single=true]:text-primary-foreground data-[range-middle=true]:bg-accent data-[range-middle=true]:text-accent-foreground data-[range-start=true]:bg-primary data-[range-start=true]:text-primary-foreground data-[range-end=true]:bg-primary data-[range-end=true]:text-primary-foreground group-data-[focused=true]/day:border-ring group-data-[focused=true]/day:ring-ring/50 dark:hover:text-accent-foreground flex aspect-square w-full min-w-[--cell-size] flex-col gap-1 leading-none font-normal group-data-[focused=true]/day:relative group-data-[focused=true]/day:z-10 group-data-[focused=true]/day:ring-[3px] data-[range-end=true]:rounded-md data-[range-end=true]:rounded-r-md data-[range-middle=true]:rounded-none data-[range-start=true]:rounded-md data-[range-start=true]:rounded-l-md [&>span]:text-xs [&>span]:opacity-70',
+        defaultClassNames.day,
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Calendar, CalendarDayButton }

frontend/components/ui/card.tsx

@@ -0,0 +1,79 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+const Card = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn(
+      "rounded-lg border bg-card text-card-foreground shadow-sm",
+      className
+    )}
+    {...props}
+  />
+))
+Card.displayName = "Card"
+
+const CardHeader = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn("flex flex-col space-y-1.5 p-6", className)}
+    {...props}
+  />
+))
+CardHeader.displayName = "CardHeader"
+
+const CardTitle = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn(
+      "text-2xl font-semibold leading-none tracking-tight",
+      className
+    )}
+    {...props}
+  />
+))
+CardTitle.displayName = "CardTitle"
+
+const CardDescription = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+CardDescription.displayName = "CardDescription"
+
+const CardContent = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div ref={ref} className={cn("p-6 pt-0", className)} {...props} />
+))
+CardContent.displayName = "CardContent"
+
+const CardFooter = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    className={cn("flex items-center p-6 pt-0", className)}
+    {...props}
+  />
+))
+CardFooter.displayName = "CardFooter"
+
+export { Card, CardHeader, CardFooter, CardTitle, CardDescription, CardContent }

frontend/components/ui/carousel.tsx

@@ -0,0 +1,262 @@
+"use client"
+
+import * as React from "react"
+import useEmblaCarousel, {
+  type UseEmblaCarouselType,
+} from "embla-carousel-react"
+import { ArrowLeft, ArrowRight } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+
+type CarouselApi = UseEmblaCarouselType[1]
+type UseCarouselParameters = Parameters<typeof useEmblaCarousel>
+type CarouselOptions = UseCarouselParameters[0]
+type CarouselPlugin = UseCarouselParameters[1]
+
+type CarouselProps = {
+  opts?: CarouselOptions
+  plugins?: CarouselPlugin
+  orientation?: "horizontal" | "vertical"
+  setApi?: (api: CarouselApi) => void
+}
+
+type CarouselContextProps = {
+  carouselRef: ReturnType<typeof useEmblaCarousel>[0]
+  api: ReturnType<typeof useEmblaCarousel>[1]
+  scrollPrev: () => void
+  scrollNext: () => void
+  canScrollPrev: boolean
+  canScrollNext: boolean
+} & CarouselProps
+
+const CarouselContext = React.createContext<CarouselContextProps | null>(null)
+
+function useCarousel() {
+  const context = React.useContext(CarouselContext)
+
+  if (!context) {
+    throw new Error("useCarousel must be used within a <Carousel />")
+  }
+
+  return context
+}
+
+const Carousel = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement> & CarouselProps
+>(
+  (
+    {
+      orientation = "horizontal",
+      opts,
+      setApi,
+      plugins,
+      className,
+      children,
+      ...props
+    },
+    ref
+  ) => {
+    const [carouselRef, api] = useEmblaCarousel(
+      {
+        ...opts,
+        axis: orientation === "horizontal" ? "x" : "y",
+      },
+      plugins
+    )
+    const [canScrollPrev, setCanScrollPrev] = React.useState(false)
+    const [canScrollNext, setCanScrollNext] = React.useState(false)
+
+    const onSelect = React.useCallback((api: CarouselApi) => {
+      if (!api) {
+        return
+      }
+
+      setCanScrollPrev(api.canScrollPrev())
+      setCanScrollNext(api.canScrollNext())
+    }, [])
+
+    const scrollPrev = React.useCallback(() => {
+      api?.scrollPrev()
+    }, [api])
+
+    const scrollNext = React.useCallback(() => {
+      api?.scrollNext()
+    }, [api])
+
+    const handleKeyDown = React.useCallback(
+      (event: React.KeyboardEvent<HTMLDivElement>) => {
+        if (event.key === "ArrowLeft") {
+          event.preventDefault()
+          scrollPrev()
+        } else if (event.key === "ArrowRight") {
+          event.preventDefault()
+          scrollNext()
+        }
+      },
+      [scrollPrev, scrollNext]
+    )
+
+    React.useEffect(() => {
+      if (!api || !setApi) {
+        return
+      }
+
+      setApi(api)
+    }, [api, setApi])
+
+    React.useEffect(() => {
+      if (!api) {
+        return
+      }
+
+      onSelect(api)
+      api.on("reInit", onSelect)
+      api.on("select", onSelect)
+
+      return () => {
+        api?.off("select", onSelect)
+      }
+    }, [api, onSelect])
+
+    return (
+      <CarouselContext.Provider
+        value={{
+          carouselRef,
+          api: api,
+          opts,
+          orientation:
+            orientation || (opts?.axis === "y" ? "vertical" : "horizontal"),
+          scrollPrev,
+          scrollNext,
+          canScrollPrev,
+          canScrollNext,
+        }}
+      >
+        <div
+          ref={ref}
+          onKeyDownCapture={handleKeyDown}
+          className={cn("relative", className)}
+          role="region"
+          aria-roledescription="carousel"
+          {...props}
+        >
+          {children}
+        </div>
+      </CarouselContext.Provider>
+    )
+  }
+)
+Carousel.displayName = "Carousel"
+
+const CarouselContent = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => {
+  const { carouselRef, orientation } = useCarousel()
+
+  return (
+    <div ref={carouselRef} className="overflow-hidden">
+      <div
+        ref={ref}
+        className={cn(
+          "flex",
+          orientation === "horizontal" ? "-ml-4" : "-mt-4 flex-col",
+          className
+        )}
+        {...props}
+      />
+    </div>
+  )
+})
+CarouselContent.displayName = "CarouselContent"
+
+const CarouselItem = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => {
+  const { orientation } = useCarousel()
+
+  return (
+    <div
+      ref={ref}
+      role="group"
+      aria-roledescription="slide"
+      className={cn(
+        "min-w-0 shrink-0 grow-0 basis-full",
+        orientation === "horizontal" ? "pl-4" : "pt-4",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+CarouselItem.displayName = "CarouselItem"
+
+const CarouselPrevious = React.forwardRef<
+  HTMLButtonElement,
+  React.ComponentProps<typeof Button>
+>(({ className, variant = "outline", size = "icon", ...props }, ref) => {
+  const { orientation, scrollPrev, canScrollPrev } = useCarousel()
+
+  return (
+    <Button
+      ref={ref}
+      variant={variant}
+      size={size}
+      className={cn(
+        "absolute  h-8 w-8 rounded-full",
+        orientation === "horizontal"
+          ? "-left-12 top-1/2 -translate-y-1/2"
+          : "-top-12 left-1/2 -translate-x-1/2 rotate-90",
+        className
+      )}
+      disabled={!canScrollPrev}
+      onClick={scrollPrev}
+      {...props}
+    >
+      <ArrowLeft className="h-4 w-4" />
+      <span className="sr-only">Previous slide</span>
+    </Button>
+  )
+})
+CarouselPrevious.displayName = "CarouselPrevious"
+
+const CarouselNext = React.forwardRef<
+  HTMLButtonElement,
+  React.ComponentProps<typeof Button>
+>(({ className, variant = "outline", size = "icon", ...props }, ref) => {
+  const { orientation, scrollNext, canScrollNext } = useCarousel()
+
+  return (
+    <Button
+      ref={ref}
+      variant={variant}
+      size={size}
+      className={cn(
+        "absolute h-8 w-8 rounded-full",
+        orientation === "horizontal"
+          ? "-right-12 top-1/2 -translate-y-1/2"
+          : "-bottom-12 left-1/2 -translate-x-1/2 rotate-90",
+        className
+      )}
+      disabled={!canScrollNext}
+      onClick={scrollNext}
+      {...props}
+    >
+      <ArrowRight className="h-4 w-4" />
+      <span className="sr-only">Next slide</span>
+    </Button>
+  )
+})
+CarouselNext.displayName = "CarouselNext"
+
+export {
+  type CarouselApi,
+  Carousel,
+  CarouselContent,
+  CarouselItem,
+  CarouselPrevious,
+  CarouselNext,
+}

frontend/components/ui/chart.tsx

@@ -0,0 +1,365 @@
+"use client"
+
+import * as React from "react"
+import * as RechartsPrimitive from "recharts"
+
+import { cn } from "@/lib/utils"
+
+// Format: { THEME_NAME: CSS_SELECTOR }
+const THEMES = { light: "", dark: ".dark" } as const
+
+export type ChartConfig = {
+  [k in string]: {
+    label?: React.ReactNode
+    icon?: React.ComponentType
+  } & (
+    | { color?: string; theme?: never }
+    | { color?: never; theme: Record<keyof typeof THEMES, string> }
+  )
+}
+
+type ChartContextProps = {
+  config: ChartConfig
+}
+
+const ChartContext = React.createContext<ChartContextProps | null>(null)
+
+function useChart() {
+  const context = React.useContext(ChartContext)
+
+  if (!context) {
+    throw new Error("useChart must be used within a <ChartContainer />")
+  }
+
+  return context
+}
+
+const ChartContainer = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div"> & {
+    config: ChartConfig
+    children: React.ComponentProps<
+      typeof RechartsPrimitive.ResponsiveContainer
+    >["children"]
+  }
+>(({ id, className, children, config, ...props }, ref) => {
+  const uniqueId = React.useId()
+  const chartId = `chart-${id || uniqueId.replace(/:/g, "")}`
+
+  return (
+    <ChartContext.Provider value={{ config }}>
+      <div
+        data-chart={chartId}
+        ref={ref}
+        className={cn(
+          "flex aspect-video justify-center text-xs [&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-dot[stroke='#fff']]:stroke-transparent [&_.recharts-layer]:outline-none [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border [&_.recharts-sector[stroke='#fff']]:stroke-transparent [&_.recharts-sector]:outline-none [&_.recharts-surface]:outline-none",
+          className
+        )}
+        {...props}
+      >
+        <ChartStyle id={chartId} config={config} />
+        <RechartsPrimitive.ResponsiveContainer>
+          {children}
+        </RechartsPrimitive.ResponsiveContainer>
+      </div>
+    </ChartContext.Provider>
+  )
+})
+ChartContainer.displayName = "Chart"
+
+const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
+  const colorConfig = Object.entries(config).filter(
+    ([_, config]) => config.theme || config.color
+  )
+
+  if (!colorConfig.length) {
+    return null
+  }
+
+  return (
+    <style
+      dangerouslySetInnerHTML={{
+        __html: Object.entries(THEMES)
+          .map(
+            ([theme, prefix]) => `
+${prefix} [data-chart=${id}] {
+${colorConfig
+  .map(([key, itemConfig]) => {
+    const color =
+      itemConfig.theme?.[theme as keyof typeof itemConfig.theme] ||
+      itemConfig.color
+    return color ? `  --color-${key}: ${color};` : null
+  })
+  .join("\n")}
+}
+`
+          )
+          .join("\n"),
+      }}
+    />
+  )
+}
+
+const ChartTooltip = RechartsPrimitive.Tooltip
+
+const ChartTooltipContent = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<typeof RechartsPrimitive.Tooltip> &
+    React.ComponentProps<"div"> & {
+      hideLabel?: boolean
+      hideIndicator?: boolean
+      indicator?: "line" | "dot" | "dashed"
+      nameKey?: string
+      labelKey?: string
+    }
+>(
+  (
+    {
+      active,
+      payload,
+      className,
+      indicator = "dot",
+      hideLabel = false,
+      hideIndicator = false,
+      label,
+      labelFormatter,
+      labelClassName,
+      formatter,
+      color,
+      nameKey,
+      labelKey,
+    },
+    ref
+  ) => {
+    const { config } = useChart()
+
+    const tooltipLabel = React.useMemo(() => {
+      if (hideLabel || !payload?.length) {
+        return null
+      }
+
+      const [item] = payload
+      const key = `${labelKey || item.dataKey || item.name || "value"}`
+      const itemConfig = getPayloadConfigFromPayload(config, item, key)
+      const value =
+        !labelKey && typeof label === "string"
+          ? config[label as keyof typeof config]?.label || label
+          : itemConfig?.label
+
+      if (labelFormatter) {
+        return (
+          <div className={cn("font-medium", labelClassName)}>
+            {labelFormatter(value, payload)}
+          </div>
+        )
+      }
+
+      if (!value) {
+        return null
+      }
+
+      return <div className={cn("font-medium", labelClassName)}>{value}</div>
+    }, [
+      label,
+      labelFormatter,
+      payload,
+      hideLabel,
+      labelClassName,
+      config,
+      labelKey,
+    ])
+
+    if (!active || !payload?.length) {
+      return null
+    }
+
+    const nestLabel = payload.length === 1 && indicator !== "dot"
+
+    return (
+      <div
+        ref={ref}
+        className={cn(
+          "grid min-w-[8rem] items-start gap-1.5 rounded-lg border border-border/50 bg-background px-2.5 py-1.5 text-xs shadow-xl",
+          className
+        )}
+      >
+        {!nestLabel ? tooltipLabel : null}
+        <div className="grid gap-1.5">
+          {payload.map((item, index) => {
+            const key = `${nameKey || item.name || item.dataKey || "value"}`
+            const itemConfig = getPayloadConfigFromPayload(config, item, key)
+            const indicatorColor = color || item.payload.fill || item.color
+
+            return (
+              <div
+                key={item.dataKey}
+                className={cn(
+                  "flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5 [&>svg]:text-muted-foreground",
+                  indicator === "dot" && "items-center"
+                )}
+              >
+                {formatter && item?.value !== undefined && item.name ? (
+                  formatter(item.value, item.name, item, index, item.payload)
+                ) : (
+                  <>
+                    {itemConfig?.icon ? (
+                      <itemConfig.icon />
+                    ) : (
+                      !hideIndicator && (
+                        <div
+                          className={cn(
+                            "shrink-0 rounded-[2px] border-[--color-border] bg-[--color-bg]",
+                            {
+                              "h-2.5 w-2.5": indicator === "dot",
+                              "w-1": indicator === "line",
+                              "w-0 border-[1.5px] border-dashed bg-transparent":
+                                indicator === "dashed",
+                              "my-0.5": nestLabel && indicator === "dashed",
+                            }
+                          )}
+                          style={
+                            {
+                              "--color-bg": indicatorColor,
+                              "--color-border": indicatorColor,
+                            } as React.CSSProperties
+                          }
+                        />
+                      )
+                    )}
+                    <div
+                      className={cn(
+                        "flex flex-1 justify-between leading-none",
+                        nestLabel ? "items-end" : "items-center"
+                      )}
+                    >
+                      <div className="grid gap-1.5">
+                        {nestLabel ? tooltipLabel : null}
+                        <span className="text-muted-foreground">
+                          {itemConfig?.label || item.name}
+                        </span>
+                      </div>
+                      {item.value && (
+                        <span className="font-mono font-medium tabular-nums text-foreground">
+                          {item.value.toLocaleString()}
+                        </span>
+                      )}
+                    </div>
+                  </>
+                )}
+              </div>
+            )
+          })}
+        </div>
+      </div>
+    )
+  }
+)
+ChartTooltipContent.displayName = "ChartTooltip"
+
+const ChartLegend = RechartsPrimitive.Legend
+
+const ChartLegendContent = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div"> &
+    Pick<RechartsPrimitive.LegendProps, "payload" | "verticalAlign"> & {
+      hideIcon?: boolean
+      nameKey?: string
+    }
+>(
+  (
+    { className, hideIcon = false, payload, verticalAlign = "bottom", nameKey },
+    ref
+  ) => {
+    const { config } = useChart()
+
+    if (!payload?.length) {
+      return null
+    }
+
+    return (
+      <div
+        ref={ref}
+        className={cn(
+          "flex items-center justify-center gap-4",
+          verticalAlign === "top" ? "pb-3" : "pt-3",
+          className
+        )}
+      >
+        {payload.map((item) => {
+          const key = `${nameKey || item.dataKey || "value"}`
+          const itemConfig = getPayloadConfigFromPayload(config, item, key)
+
+          return (
+            <div
+              key={item.value}
+              className={cn(
+                "flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3 [&>svg]:text-muted-foreground"
+              )}
+            >
+              {itemConfig?.icon && !hideIcon ? (
+                <itemConfig.icon />
+              ) : (
+                <div
+                  className="h-2 w-2 shrink-0 rounded-[2px]"
+                  style={{
+                    backgroundColor: item.color,
+                  }}
+                />
+              )}
+              {itemConfig?.label}
+            </div>
+          )
+        })}
+      </div>
+    )
+  }
+)
+ChartLegendContent.displayName = "ChartLegend"
+
+// Helper to extract item config from a payload.
+function getPayloadConfigFromPayload(
+  config: ChartConfig,
+  payload: unknown,
+  key: string
+) {
+  if (typeof payload !== "object" || payload === null) {
+    return undefined
+  }
+
+  const payloadPayload =
+    "payload" in payload &&
+    typeof payload.payload === "object" &&
+    payload.payload !== null
+      ? payload.payload
+      : undefined
+
+  let configLabelKey: string = key
+
+  if (
+    key in payload &&
+    typeof payload[key as keyof typeof payload] === "string"
+  ) {
+    configLabelKey = payload[key as keyof typeof payload] as string
+  } else if (
+    payloadPayload &&
+    key in payloadPayload &&
+    typeof payloadPayload[key as keyof typeof payloadPayload] === "string"
+  ) {
+    configLabelKey = payloadPayload[
+      key as keyof typeof payloadPayload
+    ] as string
+  }
+
+  return configLabelKey in config
+    ? config[configLabelKey]
+    : config[key as keyof typeof config]
+}
+
+export {
+  ChartContainer,
+  ChartTooltip,
+  ChartTooltipContent,
+  ChartLegend,
+  ChartLegendContent,
+  ChartStyle,
+}

frontend/components/ui/checkbox.tsx

@@ -0,0 +1,30 @@
+"use client"
+
+import * as React from "react"
+import * as CheckboxPrimitive from "@radix-ui/react-checkbox"
+import { Check } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Checkbox = React.forwardRef<
+  React.ElementRef<typeof CheckboxPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof CheckboxPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <CheckboxPrimitive.Root
+    ref={ref}
+    className={cn(
+      "peer h-4 w-4 shrink-0 rounded-sm border border-primary ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=checked]:text-primary-foreground",
+      className
+    )}
+    {...props}
+  >
+    <CheckboxPrimitive.Indicator
+      className={cn("flex items-center justify-center text-current")}
+    >
+      <Check className="h-4 w-4" />
+    </CheckboxPrimitive.Indicator>
+  </CheckboxPrimitive.Root>
+))
+Checkbox.displayName = CheckboxPrimitive.Root.displayName
+
+export { Checkbox }

frontend/components/ui/collapsible.tsx

@@ -0,0 +1,11 @@
+"use client"
+
+import * as CollapsiblePrimitive from "@radix-ui/react-collapsible"
+
+const Collapsible = CollapsiblePrimitive.Root
+
+const CollapsibleTrigger = CollapsiblePrimitive.CollapsibleTrigger
+
+const CollapsibleContent = CollapsiblePrimitive.CollapsibleContent
+
+export { Collapsible, CollapsibleTrigger, CollapsibleContent }

frontend/components/ui/command.tsx

@@ -0,0 +1,153 @@
+"use client"
+
+import * as React from "react"
+import { type DialogProps } from "@radix-ui/react-dialog"
+import { Command as CommandPrimitive } from "cmdk"
+import { Search } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+import { Dialog, DialogContent } from "@/components/ui/dialog"
+
+const Command = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive>
+>(({ className, ...props }, ref) => (
+  <CommandPrimitive
+    ref={ref}
+    className={cn(
+      "flex h-full w-full flex-col overflow-hidden rounded-md bg-popover text-popover-foreground",
+      className
+    )}
+    {...props}
+  />
+))
+Command.displayName = CommandPrimitive.displayName
+
+const CommandDialog = ({ children, ...props }: DialogProps) => {
+  return (
+    <Dialog {...props}>
+      <DialogContent className="overflow-hidden p-0 shadow-lg">
+        <Command className="[&_[cmdk-group-heading]]:px-2 [&_[cmdk-group-heading]]:font-medium [&_[cmdk-group-heading]]:text-muted-foreground [&_[cmdk-group]:not([hidden])_~[cmdk-group]]:pt-0 [&_[cmdk-group]]:px-2 [&_[cmdk-input-wrapper]_svg]:h-5 [&_[cmdk-input-wrapper]_svg]:w-5 [&_[cmdk-input]]:h-12 [&_[cmdk-item]]:px-2 [&_[cmdk-item]]:py-3 [&_[cmdk-item]_svg]:h-5 [&_[cmdk-item]_svg]:w-5">
+          {children}
+        </Command>
+      </DialogContent>
+    </Dialog>
+  )
+}
+
+const CommandInput = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.Input>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.Input>
+>(({ className, ...props }, ref) => (
+  <div className="flex items-center border-b px-3" cmdk-input-wrapper="">
+    <Search className="mr-2 h-4 w-4 shrink-0 opacity-50" />
+    <CommandPrimitive.Input
+      ref={ref}
+      className={cn(
+        "flex h-11 w-full rounded-md bg-transparent py-3 text-sm outline-none placeholder:text-muted-foreground disabled:cursor-not-allowed disabled:opacity-50",
+        className
+      )}
+      {...props}
+    />
+  </div>
+))
+
+CommandInput.displayName = CommandPrimitive.Input.displayName
+
+const CommandList = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.List>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.List>
+>(({ className, ...props }, ref) => (
+  <CommandPrimitive.List
+    ref={ref}
+    className={cn("max-h-[300px] overflow-y-auto overflow-x-hidden", className)}
+    {...props}
+  />
+))
+
+CommandList.displayName = CommandPrimitive.List.displayName
+
+const CommandEmpty = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.Empty>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.Empty>
+>((props, ref) => (
+  <CommandPrimitive.Empty
+    ref={ref}
+    className="py-6 text-center text-sm"
+    {...props}
+  />
+))
+
+CommandEmpty.displayName = CommandPrimitive.Empty.displayName
+
+const CommandGroup = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.Group>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.Group>
+>(({ className, ...props }, ref) => (
+  <CommandPrimitive.Group
+    ref={ref}
+    className={cn(
+      "overflow-hidden p-1 text-foreground [&_[cmdk-group-heading]]:px-2 [&_[cmdk-group-heading]]:py-1.5 [&_[cmdk-group-heading]]:text-xs [&_[cmdk-group-heading]]:font-medium [&_[cmdk-group-heading]]:text-muted-foreground",
+      className
+    )}
+    {...props}
+  />
+))
+
+CommandGroup.displayName = CommandPrimitive.Group.displayName
+
+const CommandSeparator = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <CommandPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 h-px bg-border", className)}
+    {...props}
+  />
+))
+CommandSeparator.displayName = CommandPrimitive.Separator.displayName
+
+const CommandItem = React.forwardRef<
+  React.ElementRef<typeof CommandPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof CommandPrimitive.Item>
+>(({ className, ...props }, ref) => (
+  <CommandPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default gap-2 select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none data-[disabled=true]:pointer-events-none data-[selected='true']:bg-accent data-[selected=true]:text-accent-foreground data-[disabled=true]:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+      className
+    )}
+    {...props}
+  />
+))
+
+CommandItem.displayName = CommandPrimitive.Item.displayName
+
+const CommandShortcut = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLSpanElement>) => {
+  return (
+    <span
+      className={cn(
+        "ml-auto text-xs tracking-widest text-muted-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+CommandShortcut.displayName = "CommandShortcut"
+
+export {
+  Command,
+  CommandDialog,
+  CommandInput,
+  CommandList,
+  CommandEmpty,
+  CommandGroup,
+  CommandItem,
+  CommandShortcut,
+  CommandSeparator,
+}

frontend/components/ui/context-menu.tsx

@@ -0,0 +1,200 @@
+"use client"
+
+import * as React from "react"
+import * as ContextMenuPrimitive from "@radix-ui/react-context-menu"
+import { Check, ChevronRight, Circle } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const ContextMenu = ContextMenuPrimitive.Root
+
+const ContextMenuTrigger = ContextMenuPrimitive.Trigger
+
+const ContextMenuGroup = ContextMenuPrimitive.Group
+
+const ContextMenuPortal = ContextMenuPrimitive.Portal
+
+const ContextMenuSub = ContextMenuPrimitive.Sub
+
+const ContextMenuRadioGroup = ContextMenuPrimitive.RadioGroup
+
+const ContextMenuSubTrigger = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.SubTrigger>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.SubTrigger> & {
+    inset?: boolean
+  }
+>(({ className, inset, children, ...props }, ref) => (
+  <ContextMenuPrimitive.SubTrigger
+    ref={ref}
+    className={cn(
+      "flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[state=open]:bg-accent data-[state=open]:text-accent-foreground",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <ChevronRight className="ml-auto h-4 w-4" />
+  </ContextMenuPrimitive.SubTrigger>
+))
+ContextMenuSubTrigger.displayName = ContextMenuPrimitive.SubTrigger.displayName
+
+const ContextMenuSubContent = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.SubContent>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.SubContent>
+>(({ className, ...props }, ref) => (
+  <ContextMenuPrimitive.SubContent
+    ref={ref}
+    className={cn(
+      "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+      className
+    )}
+    {...props}
+  />
+))
+ContextMenuSubContent.displayName = ContextMenuPrimitive.SubContent.displayName
+
+const ContextMenuContent = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Content>
+>(({ className, ...props }, ref) => (
+  <ContextMenuPrimitive.Portal>
+    <ContextMenuPrimitive.Content
+      ref={ref}
+      className={cn(
+        "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md animate-in fade-in-80 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        className
+      )}
+      {...props}
+    />
+  </ContextMenuPrimitive.Portal>
+))
+ContextMenuContent.displayName = ContextMenuPrimitive.Content.displayName
+
+const ContextMenuItem = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Item> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <ContextMenuPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+ContextMenuItem.displayName = ContextMenuPrimitive.Item.displayName
+
+const ContextMenuCheckboxItem = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.CheckboxItem>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.CheckboxItem>
+>(({ className, children, checked, ...props }, ref) => (
+  <ContextMenuPrimitive.CheckboxItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    checked={checked}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <ContextMenuPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </ContextMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </ContextMenuPrimitive.CheckboxItem>
+))
+ContextMenuCheckboxItem.displayName =
+  ContextMenuPrimitive.CheckboxItem.displayName
+
+const ContextMenuRadioItem = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.RadioItem>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.RadioItem>
+>(({ className, children, ...props }, ref) => (
+  <ContextMenuPrimitive.RadioItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <ContextMenuPrimitive.ItemIndicator>
+        <Circle className="h-2 w-2 fill-current" />
+      </ContextMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </ContextMenuPrimitive.RadioItem>
+))
+ContextMenuRadioItem.displayName = ContextMenuPrimitive.RadioItem.displayName
+
+const ContextMenuLabel = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Label> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <ContextMenuPrimitive.Label
+    ref={ref}
+    className={cn(
+      "px-2 py-1.5 text-sm font-semibold text-foreground",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+ContextMenuLabel.displayName = ContextMenuPrimitive.Label.displayName
+
+const ContextMenuSeparator = React.forwardRef<
+  React.ElementRef<typeof ContextMenuPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof ContextMenuPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <ContextMenuPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-border", className)}
+    {...props}
+  />
+))
+ContextMenuSeparator.displayName = ContextMenuPrimitive.Separator.displayName
+
+const ContextMenuShortcut = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLSpanElement>) => {
+  return (
+    <span
+      className={cn(
+        "ml-auto text-xs tracking-widest text-muted-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+ContextMenuShortcut.displayName = "ContextMenuShortcut"
+
+export {
+  ContextMenu,
+  ContextMenuTrigger,
+  ContextMenuContent,
+  ContextMenuItem,
+  ContextMenuCheckboxItem,
+  ContextMenuRadioItem,
+  ContextMenuLabel,
+  ContextMenuSeparator,
+  ContextMenuShortcut,
+  ContextMenuGroup,
+  ContextMenuPortal,
+  ContextMenuSub,
+  ContextMenuSubContent,
+  ContextMenuSubTrigger,
+  ContextMenuRadioGroup,
+}

frontend/components/ui/dialog.tsx

@@ -0,0 +1,122 @@
+"use client"
+
+import * as React from "react"
+import * as DialogPrimitive from "@radix-ui/react-dialog"
+import { X } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Dialog = DialogPrimitive.Root
+
+const DialogTrigger = DialogPrimitive.Trigger
+
+const DialogPortal = DialogPrimitive.Portal
+
+const DialogClose = DialogPrimitive.Close
+
+const DialogOverlay = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Overlay
+    ref={ref}
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80  data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+  />
+))
+DialogOverlay.displayName = DialogPrimitive.Overlay.displayName
+
+const DialogContent = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Content>
+>(({ className, children, ...props }, ref) => (
+  <DialogPortal>
+    <DialogOverlay />
+    <DialogPrimitive.Content
+      ref={ref}
+      className={cn(
+        "fixed left-[50%] top-[50%] z-50 grid w-full max-w-lg translate-x-[-50%] translate-y-[-50%] gap-4 border bg-background p-6 shadow-lg duration-200 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[state=closed]:slide-out-to-left-1/2 data-[state=closed]:slide-out-to-top-[48%] data-[state=open]:slide-in-from-left-1/2 data-[state=open]:slide-in-from-top-[48%] sm:rounded-lg",
+        className
+      )}
+      {...props}
+    >
+      {children}
+      <DialogPrimitive.Close className="absolute right-4 top-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
+        <X className="h-4 w-4" />
+        <span className="sr-only">Close</span>
+      </DialogPrimitive.Close>
+    </DialogPrimitive.Content>
+  </DialogPortal>
+))
+DialogContent.displayName = DialogPrimitive.Content.displayName
+
+const DialogHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col space-y-1.5 text-center sm:text-left",
+      className
+    )}
+    {...props}
+  />
+)
+DialogHeader.displayName = "DialogHeader"
+
+const DialogFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      className
+    )}
+    {...props}
+  />
+)
+DialogFooter.displayName = "DialogFooter"
+
+const DialogTitle = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Title
+    ref={ref}
+    className={cn(
+      "text-lg font-semibold leading-none tracking-tight",
+      className
+    )}
+    {...props}
+  />
+))
+DialogTitle.displayName = DialogPrimitive.Title.displayName
+
+const DialogDescription = React.forwardRef<
+  React.ElementRef<typeof DialogPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof DialogPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <DialogPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+DialogDescription.displayName = DialogPrimitive.Description.displayName
+
+export {
+  Dialog,
+  DialogPortal,
+  DialogOverlay,
+  DialogClose,
+  DialogTrigger,
+  DialogContent,
+  DialogHeader,
+  DialogFooter,
+  DialogTitle,
+  DialogDescription,
+}

frontend/components/ui/drawer.tsx

@@ -0,0 +1,118 @@
+"use client"
+
+import * as React from "react"
+import { Drawer as DrawerPrimitive } from "vaul"
+
+import { cn } from "@/lib/utils"
+
+const Drawer = ({
+  shouldScaleBackground = true,
+  ...props
+}: React.ComponentProps<typeof DrawerPrimitive.Root>) => (
+  <DrawerPrimitive.Root
+    shouldScaleBackground={shouldScaleBackground}
+    {...props}
+  />
+)
+Drawer.displayName = "Drawer"
+
+const DrawerTrigger = DrawerPrimitive.Trigger
+
+const DrawerPortal = DrawerPrimitive.Portal
+
+const DrawerClose = DrawerPrimitive.Close
+
+const DrawerOverlay = React.forwardRef<
+  React.ElementRef<typeof DrawerPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof DrawerPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <DrawerPrimitive.Overlay
+    ref={ref}
+    className={cn("fixed inset-0 z-50 bg-black/80", className)}
+    {...props}
+  />
+))
+DrawerOverlay.displayName = DrawerPrimitive.Overlay.displayName
+
+const DrawerContent = React.forwardRef<
+  React.ElementRef<typeof DrawerPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DrawerPrimitive.Content>
+>(({ className, children, ...props }, ref) => (
+  <DrawerPortal>
+    <DrawerOverlay />
+    <DrawerPrimitive.Content
+      ref={ref}
+      className={cn(
+        "fixed inset-x-0 bottom-0 z-50 mt-24 flex h-auto flex-col rounded-t-[10px] border bg-background",
+        className
+      )}
+      {...props}
+    >
+      <div className="mx-auto mt-4 h-2 w-[100px] rounded-full bg-muted" />
+      {children}
+    </DrawerPrimitive.Content>
+  </DrawerPortal>
+))
+DrawerContent.displayName = "DrawerContent"
+
+const DrawerHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn("grid gap-1.5 p-4 text-center sm:text-left", className)}
+    {...props}
+  />
+)
+DrawerHeader.displayName = "DrawerHeader"
+
+const DrawerFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn("mt-auto flex flex-col gap-2 p-4", className)}
+    {...props}
+  />
+)
+DrawerFooter.displayName = "DrawerFooter"
+
+const DrawerTitle = React.forwardRef<
+  React.ElementRef<typeof DrawerPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof DrawerPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <DrawerPrimitive.Title
+    ref={ref}
+    className={cn(
+      "text-lg font-semibold leading-none tracking-tight",
+      className
+    )}
+    {...props}
+  />
+))
+DrawerTitle.displayName = DrawerPrimitive.Title.displayName
+
+const DrawerDescription = React.forwardRef<
+  React.ElementRef<typeof DrawerPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof DrawerPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <DrawerPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+DrawerDescription.displayName = DrawerPrimitive.Description.displayName
+
+export {
+  Drawer,
+  DrawerPortal,
+  DrawerOverlay,
+  DrawerTrigger,
+  DrawerClose,
+  DrawerContent,
+  DrawerHeader,
+  DrawerFooter,
+  DrawerTitle,
+  DrawerDescription,
+}

frontend/components/ui/dropdown-menu.tsx

@@ -0,0 +1,200 @@
+"use client"
+
+import * as React from "react"
+import * as DropdownMenuPrimitive from "@radix-ui/react-dropdown-menu"
+import { Check, ChevronRight, Circle } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const DropdownMenu = DropdownMenuPrimitive.Root
+
+const DropdownMenuTrigger = DropdownMenuPrimitive.Trigger
+
+const DropdownMenuGroup = DropdownMenuPrimitive.Group
+
+const DropdownMenuPortal = DropdownMenuPrimitive.Portal
+
+const DropdownMenuSub = DropdownMenuPrimitive.Sub
+
+const DropdownMenuRadioGroup = DropdownMenuPrimitive.RadioGroup
+
+const DropdownMenuSubTrigger = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.SubTrigger>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.SubTrigger> & {
+    inset?: boolean
+  }
+>(({ className, inset, children, ...props }, ref) => (
+  <DropdownMenuPrimitive.SubTrigger
+    ref={ref}
+    className={cn(
+      "flex cursor-default gap-2 select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent data-[state=open]:bg-accent [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <ChevronRight className="ml-auto" />
+  </DropdownMenuPrimitive.SubTrigger>
+))
+DropdownMenuSubTrigger.displayName =
+  DropdownMenuPrimitive.SubTrigger.displayName
+
+const DropdownMenuSubContent = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.SubContent>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.SubContent>
+>(({ className, ...props }, ref) => (
+  <DropdownMenuPrimitive.SubContent
+    ref={ref}
+    className={cn(
+      "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-lg data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+      className
+    )}
+    {...props}
+  />
+))
+DropdownMenuSubContent.displayName =
+  DropdownMenuPrimitive.SubContent.displayName
+
+const DropdownMenuContent = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Content>
+>(({ className, sideOffset = 4, ...props }, ref) => (
+  <DropdownMenuPrimitive.Portal>
+    <DropdownMenuPrimitive.Content
+      ref={ref}
+      sideOffset={sideOffset}
+      className={cn(
+        "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        className
+      )}
+      {...props}
+    />
+  </DropdownMenuPrimitive.Portal>
+))
+DropdownMenuContent.displayName = DropdownMenuPrimitive.Content.displayName
+
+const DropdownMenuItem = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Item> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <DropdownMenuPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+DropdownMenuItem.displayName = DropdownMenuPrimitive.Item.displayName
+
+const DropdownMenuCheckboxItem = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.CheckboxItem>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.CheckboxItem>
+>(({ className, children, checked, ...props }, ref) => (
+  <DropdownMenuPrimitive.CheckboxItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    checked={checked}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <DropdownMenuPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </DropdownMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </DropdownMenuPrimitive.CheckboxItem>
+))
+DropdownMenuCheckboxItem.displayName =
+  DropdownMenuPrimitive.CheckboxItem.displayName
+
+const DropdownMenuRadioItem = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.RadioItem>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.RadioItem>
+>(({ className, children, ...props }, ref) => (
+  <DropdownMenuPrimitive.RadioItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none transition-colors focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <DropdownMenuPrimitive.ItemIndicator>
+        <Circle className="h-2 w-2 fill-current" />
+      </DropdownMenuPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </DropdownMenuPrimitive.RadioItem>
+))
+DropdownMenuRadioItem.displayName = DropdownMenuPrimitive.RadioItem.displayName
+
+const DropdownMenuLabel = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Label> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <DropdownMenuPrimitive.Label
+    ref={ref}
+    className={cn(
+      "px-2 py-1.5 text-sm font-semibold",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+DropdownMenuLabel.displayName = DropdownMenuPrimitive.Label.displayName
+
+const DropdownMenuSeparator = React.forwardRef<
+  React.ElementRef<typeof DropdownMenuPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof DropdownMenuPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <DropdownMenuPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-muted", className)}
+    {...props}
+  />
+))
+DropdownMenuSeparator.displayName = DropdownMenuPrimitive.Separator.displayName
+
+const DropdownMenuShortcut = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLSpanElement>) => {
+  return (
+    <span
+      className={cn("ml-auto text-xs tracking-widest opacity-60", className)}
+      {...props}
+    />
+  )
+}
+DropdownMenuShortcut.displayName = "DropdownMenuShortcut"
+
+export {
+  DropdownMenu,
+  DropdownMenuTrigger,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuCheckboxItem,
+  DropdownMenuRadioItem,
+  DropdownMenuLabel,
+  DropdownMenuSeparator,
+  DropdownMenuShortcut,
+  DropdownMenuGroup,
+  DropdownMenuPortal,
+  DropdownMenuSub,
+  DropdownMenuSubContent,
+  DropdownMenuSubTrigger,
+  DropdownMenuRadioGroup,
+}

frontend/components/ui/form.tsx

@@ -0,0 +1,178 @@
+"use client"
+
+import * as React from "react"
+import * as LabelPrimitive from "@radix-ui/react-label"
+import { Slot } from "@radix-ui/react-slot"
+import {
+  Controller,
+  ControllerProps,
+  FieldPath,
+  FieldValues,
+  FormProvider,
+  useFormContext,
+} from "react-hook-form"
+
+import { cn } from "@/lib/utils"
+import { Label } from "@/components/ui/label"
+
+const Form = FormProvider
+
+type FormFieldContextValue<
+  TFieldValues extends FieldValues = FieldValues,
+  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>
+> = {
+  name: TName
+}
+
+const FormFieldContext = React.createContext<FormFieldContextValue>(
+  {} as FormFieldContextValue
+)
+
+const FormField = <
+  TFieldValues extends FieldValues = FieldValues,
+  TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>
+>({
+  ...props
+}: ControllerProps<TFieldValues, TName>) => {
+  return (
+    <FormFieldContext.Provider value={{ name: props.name }}>
+      <Controller {...props} />
+    </FormFieldContext.Provider>
+  )
+}
+
+const useFormField = () => {
+  const fieldContext = React.useContext(FormFieldContext)
+  const itemContext = React.useContext(FormItemContext)
+  const { getFieldState, formState } = useFormContext()
+
+  const fieldState = getFieldState(fieldContext.name, formState)
+
+  if (!fieldContext) {
+    throw new Error("useFormField should be used within <FormField>")
+  }
+
+  const { id } = itemContext
+
+  return {
+    id,
+    name: fieldContext.name,
+    formItemId: `${id}-form-item`,
+    formDescriptionId: `${id}-form-item-description`,
+    formMessageId: `${id}-form-item-message`,
+    ...fieldState,
+  }
+}
+
+type FormItemContextValue = {
+  id: string
+}
+
+const FormItemContext = React.createContext<FormItemContextValue>(
+  {} as FormItemContextValue
+)
+
+const FormItem = React.forwardRef<
+  HTMLDivElement,
+  React.HTMLAttributes<HTMLDivElement>
+>(({ className, ...props }, ref) => {
+  const id = React.useId()
+
+  return (
+    <FormItemContext.Provider value={{ id }}>
+      <div ref={ref} className={cn("space-y-2", className)} {...props} />
+    </FormItemContext.Provider>
+  )
+})
+FormItem.displayName = "FormItem"
+
+const FormLabel = React.forwardRef<
+  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root>
+>(({ className, ...props }, ref) => {
+  const { error, formItemId } = useFormField()
+
+  return (
+    <Label
+      ref={ref}
+      className={cn(error && "text-destructive", className)}
+      htmlFor={formItemId}
+      {...props}
+    />
+  )
+})
+FormLabel.displayName = "FormLabel"
+
+const FormControl = React.forwardRef<
+  React.ElementRef<typeof Slot>,
+  React.ComponentPropsWithoutRef<typeof Slot>
+>(({ ...props }, ref) => {
+  const { error, formItemId, formDescriptionId, formMessageId } = useFormField()
+
+  return (
+    <Slot
+      ref={ref}
+      id={formItemId}
+      aria-describedby={
+        !error
+          ? `${formDescriptionId}`
+          : `${formDescriptionId} ${formMessageId}`
+      }
+      aria-invalid={!!error}
+      {...props}
+    />
+  )
+})
+FormControl.displayName = "FormControl"
+
+const FormDescription = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, ...props }, ref) => {
+  const { formDescriptionId } = useFormField()
+
+  return (
+    <p
+      ref={ref}
+      id={formDescriptionId}
+      className={cn("text-sm text-muted-foreground", className)}
+      {...props}
+    />
+  )
+})
+FormDescription.displayName = "FormDescription"
+
+const FormMessage = React.forwardRef<
+  HTMLParagraphElement,
+  React.HTMLAttributes<HTMLParagraphElement>
+>(({ className, children, ...props }, ref) => {
+  const { error, formMessageId } = useFormField()
+  const body = error ? String(error?.message) : children
+
+  if (!body) {
+    return null
+  }
+
+  return (
+    <p
+      ref={ref}
+      id={formMessageId}
+      className={cn("text-sm font-medium text-destructive", className)}
+      {...props}
+    >
+      {body}
+    </p>
+  )
+})
+FormMessage.displayName = "FormMessage"
+
+export {
+  useFormField,
+  Form,
+  FormItem,
+  FormLabel,
+  FormControl,
+  FormDescription,
+  FormMessage,
+  FormField,
+}

frontend/components/ui/hover-card.tsx

@@ -0,0 +1,29 @@
+"use client"
+
+import * as React from "react"
+import * as HoverCardPrimitive from "@radix-ui/react-hover-card"
+
+import { cn } from "@/lib/utils"
+
+const HoverCard = HoverCardPrimitive.Root
+
+const HoverCardTrigger = HoverCardPrimitive.Trigger
+
+const HoverCardContent = React.forwardRef<
+  React.ElementRef<typeof HoverCardPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof HoverCardPrimitive.Content>
+>(({ className, align = "center", sideOffset = 4, ...props }, ref) => (
+  <HoverCardPrimitive.Content
+    ref={ref}
+    align={align}
+    sideOffset={sideOffset}
+    className={cn(
+      "z-50 w-64 rounded-md border bg-popover p-4 text-popover-foreground shadow-md outline-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+      className
+    )}
+    {...props}
+  />
+))
+HoverCardContent.displayName = HoverCardPrimitive.Content.displayName
+
+export { HoverCard, HoverCardTrigger, HoverCardContent }

frontend/components/ui/input-otp.tsx

@@ -0,0 +1,71 @@
+"use client"
+
+import * as React from "react"
+import { OTPInput, OTPInputContext } from "input-otp"
+import { Dot } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const InputOTP = React.forwardRef<
+  React.ElementRef<typeof OTPInput>,
+  React.ComponentPropsWithoutRef<typeof OTPInput>
+>(({ className, containerClassName, ...props }, ref) => (
+  <OTPInput
+    ref={ref}
+    containerClassName={cn(
+      "flex items-center gap-2 has-[:disabled]:opacity-50",
+      containerClassName
+    )}
+    className={cn("disabled:cursor-not-allowed", className)}
+    {...props}
+  />
+))
+InputOTP.displayName = "InputOTP"
+
+const InputOTPGroup = React.forwardRef<
+  React.ElementRef<"div">,
+  React.ComponentPropsWithoutRef<"div">
+>(({ className, ...props }, ref) => (
+  <div ref={ref} className={cn("flex items-center", className)} {...props} />
+))
+InputOTPGroup.displayName = "InputOTPGroup"
+
+const InputOTPSlot = React.forwardRef<
+  React.ElementRef<"div">,
+  React.ComponentPropsWithoutRef<"div"> & { index: number }
+>(({ index, className, ...props }, ref) => {
+  const inputOTPContext = React.useContext(OTPInputContext)
+  const { char, hasFakeCaret, isActive } = inputOTPContext.slots[index]
+
+  return (
+    <div
+      ref={ref}
+      className={cn(
+        "relative flex h-10 w-10 items-center justify-center border-y border-r border-input text-sm transition-all first:rounded-l-md first:border-l last:rounded-r-md",
+        isActive && "z-10 ring-2 ring-ring ring-offset-background",
+        className
+      )}
+      {...props}
+    >
+      {char}
+      {hasFakeCaret && (
+        <div className="pointer-events-none absolute inset-0 flex items-center justify-center">
+          <div className="h-4 w-px animate-caret-blink bg-foreground duration-1000" />
+        </div>
+      )}
+    </div>
+  )
+})
+InputOTPSlot.displayName = "InputOTPSlot"
+
+const InputOTPSeparator = React.forwardRef<
+  React.ElementRef<"div">,
+  React.ComponentPropsWithoutRef<"div">
+>(({ ...props }, ref) => (
+  <div ref={ref} role="separator" {...props}>
+    <Dot />
+  </div>
+))
+InputOTPSeparator.displayName = "InputOTPSeparator"
+
+export { InputOTP, InputOTPGroup, InputOTPSlot, InputOTPSeparator }

frontend/components/ui/input.tsx

@@ -0,0 +1,22 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<"input">>(
+  ({ className, type, ...props }, ref) => {
+    return (
+      <input
+        type={type}
+        className={cn(
+          "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-base ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Input.displayName = "Input"
+
+export { Input }

frontend/components/ui/label.tsx

@@ -0,0 +1,26 @@
+"use client"
+
+import * as React from "react"
+import * as LabelPrimitive from "@radix-ui/react-label"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const labelVariants = cva(
+  "text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70"
+)
+
+const Label = React.forwardRef<
+  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root> &
+    VariantProps<typeof labelVariants>
+>(({ className, ...props }, ref) => (
+  <LabelPrimitive.Root
+    ref={ref}
+    className={cn(labelVariants(), className)}
+    {...props}
+  />
+))
+Label.displayName = LabelPrimitive.Root.displayName
+
+export { Label }

frontend/components/ui/menubar.tsx

@@ -0,0 +1,236 @@
+"use client"
+
+import * as React from "react"
+import * as MenubarPrimitive from "@radix-ui/react-menubar"
+import { Check, ChevronRight, Circle } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const MenubarMenu = MenubarPrimitive.Menu
+
+const MenubarGroup = MenubarPrimitive.Group
+
+const MenubarPortal = MenubarPrimitive.Portal
+
+const MenubarSub = MenubarPrimitive.Sub
+
+const MenubarRadioGroup = MenubarPrimitive.RadioGroup
+
+const Menubar = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <MenubarPrimitive.Root
+    ref={ref}
+    className={cn(
+      "flex h-10 items-center space-x-1 rounded-md border bg-background p-1",
+      className
+    )}
+    {...props}
+  />
+))
+Menubar.displayName = MenubarPrimitive.Root.displayName
+
+const MenubarTrigger = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.Trigger>
+>(({ className, ...props }, ref) => (
+  <MenubarPrimitive.Trigger
+    ref={ref}
+    className={cn(
+      "flex cursor-default select-none items-center rounded-sm px-3 py-1.5 text-sm font-medium outline-none focus:bg-accent focus:text-accent-foreground data-[state=open]:bg-accent data-[state=open]:text-accent-foreground",
+      className
+    )}
+    {...props}
+  />
+))
+MenubarTrigger.displayName = MenubarPrimitive.Trigger.displayName
+
+const MenubarSubTrigger = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.SubTrigger>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.SubTrigger> & {
+    inset?: boolean
+  }
+>(({ className, inset, children, ...props }, ref) => (
+  <MenubarPrimitive.SubTrigger
+    ref={ref}
+    className={cn(
+      "flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[state=open]:bg-accent data-[state=open]:text-accent-foreground",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <ChevronRight className="ml-auto h-4 w-4" />
+  </MenubarPrimitive.SubTrigger>
+))
+MenubarSubTrigger.displayName = MenubarPrimitive.SubTrigger.displayName
+
+const MenubarSubContent = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.SubContent>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.SubContent>
+>(({ className, ...props }, ref) => (
+  <MenubarPrimitive.SubContent
+    ref={ref}
+    className={cn(
+      "z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+      className
+    )}
+    {...props}
+  />
+))
+MenubarSubContent.displayName = MenubarPrimitive.SubContent.displayName
+
+const MenubarContent = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.Content>
+>(
+  (
+    { className, align = "start", alignOffset = -4, sideOffset = 8, ...props },
+    ref
+  ) => (
+    <MenubarPrimitive.Portal>
+      <MenubarPrimitive.Content
+        ref={ref}
+        align={align}
+        alignOffset={alignOffset}
+        sideOffset={sideOffset}
+        className={cn(
+          "z-50 min-w-[12rem] overflow-hidden rounded-md border bg-popover p-1 text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+          className
+        )}
+        {...props}
+      />
+    </MenubarPrimitive.Portal>
+  )
+)
+MenubarContent.displayName = MenubarPrimitive.Content.displayName
+
+const MenubarItem = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.Item> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <MenubarPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm px-2 py-1.5 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+MenubarItem.displayName = MenubarPrimitive.Item.displayName
+
+const MenubarCheckboxItem = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.CheckboxItem>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.CheckboxItem>
+>(({ className, children, checked, ...props }, ref) => (
+  <MenubarPrimitive.CheckboxItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    checked={checked}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <MenubarPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </MenubarPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </MenubarPrimitive.CheckboxItem>
+))
+MenubarCheckboxItem.displayName = MenubarPrimitive.CheckboxItem.displayName
+
+const MenubarRadioItem = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.RadioItem>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.RadioItem>
+>(({ className, children, ...props }, ref) => (
+  <MenubarPrimitive.RadioItem
+    ref={ref}
+    className={cn(
+      "relative flex cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <MenubarPrimitive.ItemIndicator>
+        <Circle className="h-2 w-2 fill-current" />
+      </MenubarPrimitive.ItemIndicator>
+    </span>
+    {children}
+  </MenubarPrimitive.RadioItem>
+))
+MenubarRadioItem.displayName = MenubarPrimitive.RadioItem.displayName
+
+const MenubarLabel = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.Label> & {
+    inset?: boolean
+  }
+>(({ className, inset, ...props }, ref) => (
+  <MenubarPrimitive.Label
+    ref={ref}
+    className={cn(
+      "px-2 py-1.5 text-sm font-semibold",
+      inset && "pl-8",
+      className
+    )}
+    {...props}
+  />
+))
+MenubarLabel.displayName = MenubarPrimitive.Label.displayName
+
+const MenubarSeparator = React.forwardRef<
+  React.ElementRef<typeof MenubarPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof MenubarPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <MenubarPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-muted", className)}
+    {...props}
+  />
+))
+MenubarSeparator.displayName = MenubarPrimitive.Separator.displayName
+
+const MenubarShortcut = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLSpanElement>) => {
+  return (
+    <span
+      className={cn(
+        "ml-auto text-xs tracking-widest text-muted-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+MenubarShortcut.displayname = "MenubarShortcut"
+
+export {
+  Menubar,
+  MenubarMenu,
+  MenubarTrigger,
+  MenubarContent,
+  MenubarItem,
+  MenubarSeparator,
+  MenubarLabel,
+  MenubarCheckboxItem,
+  MenubarRadioGroup,
+  MenubarRadioItem,
+  MenubarPortal,
+  MenubarSubContent,
+  MenubarSubTrigger,
+  MenubarGroup,
+  MenubarSub,
+  MenubarShortcut,
+}

frontend/components/ui/navbar.tsx

@@ -0,0 +1,130 @@
+"use client"
+
+import Link from "next/link"
+import { AuthButtons } from "@/components/auth-buttons" // Renamed from MetaMaskConnect
+import { useAuth } from "@/context/auth-context"
+import { Button } from "@/components/ui/button"
+import { Sheet, SheetContent, SheetTrigger } from "@/components/ui/sheet"
+import { Menu, Sun, Moon } from "lucide-react"
+import { useTheme } from "next-themes"
+import { useState, useEffect } from "react"
+
+export function Navbar() {
+  const { user, firebaseUser, authMethod } = useAuth() // Use authMethod to determine display
+  const { theme, setTheme } = useTheme()
+  const [mounted, setMounted] = useState(false)
+
+  useEffect(() => {
+    setMounted(true)
+  }, [])
+
+  return (
+    <header className="sticky top-0 z-40 w-full border-b bg-white/80 backdrop-blur-md dark:bg-gray-950/80">
+      <div className="container flex h-16 items-center justify-between">
+        <Link href="/" className="text-2xl font-bold text-primary-purple">
+          OpenLearnX
+        </Link>
+        <nav className="hidden md:flex items-center space-x-6">
+          <Link
+            href="/"
+            className="text-sm font-medium text-gray-600 hover:text-primary-blue dark:text-gray-300 dark:hover:text-primary-blue"
+          >
+            Home
+          </Link>
+          <Link
+            href="/courses"
+            className="text-sm font-medium text-gray-600 hover:text-primary-blue dark:text-gray-300 dark:hover:text-primary-blue"
+          >
+            Courses
+          </Link>
+          <Link
+            href="/coding"
+            className="text-sm font-medium text-gray-600 hover:text-primary-blue dark:text-gray-300 dark:hover:text-primary-blue"
+          >
+            Coding Practice
+          </Link>
+          <Link
+            href="/quizzes"
+            className="text-sm font-medium text-gray-600 hover:text-primary-blue dark:text-gray-300 dark:hover:text-primary-blue"
+          >
+            Quizzes
+          </Link>
+          <Link
+            href="/dashboard"
+            className="text-sm font-medium text-gray-600 hover:text-primary-blue dark:text-gray-300 dark:hover:text-primary-blue"
+          >
+            Dashboard
+          </Link>
+          <AuthButtons /> {/* Use the new AuthButtons component */}
+          <Button
+            variant="ghost"
+            size="icon"
+            onClick={() => setTheme(theme === "dark" ? "light" : "dark")}
+            className="ml-2"
+          >
+            {mounted && (theme === "dark" ? <Sun className="h-5 w-5" /> : <Moon className="h-5 w-5" />)}
+            {!mounted && <div className="h-5 w-5" />} {/* Render a placeholder div to maintain layout */}
+            <span className="sr-only">Toggle theme</span>
+          </Button>
+        </nav>
+        <div className="md:hidden flex items-center">
+          <Button
+            variant="ghost"
+            size="icon"
+            onClick={() => setTheme(theme === "dark" ? "light" : "dark")}
+            className="mr-2"
+          >
+            {mounted && (theme === "dark" ? <Sun className="h-5 w-5" /> : <Moon className="h-5 w-5" />)}
+            {!mounted && <div className="h-5 w-5" />} {/* Render a placeholder div to maintain layout */}
+            <span className="sr-only">Toggle theme</span>
+          </Button>
+          <Sheet>
+            <SheetTrigger asChild>
+              <Button variant="outline" size="icon">
+                <Menu className="h-6 w-6" />
+                <span className="sr-only">Toggle navigation</span>
+              </Button>
+            </SheetTrigger>
+            <SheetContent side="right" className="w-[250px] sm:w-[300px] p-4 dark:bg-gray-900">
+              <nav className="flex flex-col gap-4">
+                <Link
+                  href="/"
+                  className="text-lg font-medium text-gray-800 hover:text-primary-blue dark:text-gray-200 dark:hover:text-primary-blue"
+                >
+                  Home
+                </Link>
+                <Link
+                  href="/courses"
+                  className="text-lg font-medium text-gray-800 hover:text-primary-blue dark:text-gray-200 dark:hover:text-primary-blue"
+                >
+                  Courses
+                </Link>
+                <Link
+                  href="/coding"
+                  className="text-lg font-medium text-gray-800 hover:text-primary-blue dark:text-gray-200 dark:hover:text-primary-blue"
+                >
+                  Coding Practice
+                </Link>
+                <Link
+                  href="/quizzes"
+                  className="text-lg font-medium text-gray-800 hover:text-primary-blue dark:text-gray-200 dark:hover:text-primary-blue"
+                >
+                  Quizzes
+                </Link>
+                <Link
+                  href="/dashboard"
+                  className="text-lg font-medium text-gray-800 hover:text-primary-blue dark:text-gray-200 dark:hover:text-primary-blue"
+                >
+                  Dashboard
+                </Link>
+                <div className="mt-4">
+                  <AuthButtons />
+                </div>
+              </nav>
+            </SheetContent>
+          </Sheet>
+        </div>
+      </div>
+    </header>
+  )
+}

frontend/components/ui/navigation-menu.tsx

@@ -0,0 +1,128 @@
+import * as React from "react"
+import * as NavigationMenuPrimitive from "@radix-ui/react-navigation-menu"
+import { cva } from "class-variance-authority"
+import { ChevronDown } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const NavigationMenu = React.forwardRef<
+  React.ElementRef<typeof NavigationMenuPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof NavigationMenuPrimitive.Root>
+>(({ className, children, ...props }, ref) => (
+  <NavigationMenuPrimitive.Root
+    ref={ref}
+    className={cn(
+      "relative z-10 flex max-w-max flex-1 items-center justify-center",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <NavigationMenuViewport />
+  </NavigationMenuPrimitive.Root>
+))
+NavigationMenu.displayName = NavigationMenuPrimitive.Root.displayName
+
+const NavigationMenuList = React.forwardRef<
+  React.ElementRef<typeof NavigationMenuPrimitive.List>,
+  React.ComponentPropsWithoutRef<typeof NavigationMenuPrimitive.List>
+>(({ className, ...props }, ref) => (
+  <NavigationMenuPrimitive.List
+    ref={ref}
+    className={cn(
+      "group flex flex-1 list-none items-center justify-center space-x-1",
+      className
+    )}
+    {...props}
+  />
+))
+NavigationMenuList.displayName = NavigationMenuPrimitive.List.displayName
+
+const NavigationMenuItem = NavigationMenuPrimitive.Item
+
+const navigationMenuTriggerStyle = cva(
+  "group inline-flex h-10 w-max items-center justify-center rounded-md bg-background px-4 py-2 text-sm font-medium transition-colors hover:bg-accent hover:text-accent-foreground focus:bg-accent focus:text-accent-foreground focus:outline-none disabled:pointer-events-none disabled:opacity-50 data-[active]:bg-accent/50 data-[state=open]:bg-accent/50"
+)
+
+const NavigationMenuTrigger = React.forwardRef<
+  React.ElementRef<typeof NavigationMenuPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof NavigationMenuPrimitive.Trigger>
+>(({ className, children, ...props }, ref) => (
+  <NavigationMenuPrimitive.Trigger
+    ref={ref}
+    className={cn(navigationMenuTriggerStyle(), "group", className)}
+    {...props}
+  >
+    {children}{" "}
+    <ChevronDown
+      className="relative top-[1px] ml-1 h-3 w-3 transition duration-200 group-data-[state=open]:rotate-180"
+      aria-hidden="true"
+    />
+  </NavigationMenuPrimitive.Trigger>
+))
+NavigationMenuTrigger.displayName = NavigationMenuPrimitive.Trigger.displayName
+
+const NavigationMenuContent = React.forwardRef<
+  React.ElementRef<typeof NavigationMenuPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof NavigationMenuPrimitive.Content>
+>(({ className, ...props }, ref) => (
+  <NavigationMenuPrimitive.Content
+    ref={ref}
+    className={cn(
+      "left-0 top-0 w-full data-[motion^=from-]:animate-in data-[motion^=to-]:animate-out data-[motion^=from-]:fade-in data-[motion^=to-]:fade-out data-[motion=from-end]:slide-in-from-right-52 data-[motion=from-start]:slide-in-from-left-52 data-[motion=to-end]:slide-out-to-right-52 data-[motion=to-start]:slide-out-to-left-52 md:absolute md:w-auto ",
+      className
+    )}
+    {...props}
+  />
+))
+NavigationMenuContent.displayName = NavigationMenuPrimitive.Content.displayName
+
+const NavigationMenuLink = NavigationMenuPrimitive.Link
+
+const NavigationMenuViewport = React.forwardRef<
+  React.ElementRef<typeof NavigationMenuPrimitive.Viewport>,
+  React.ComponentPropsWithoutRef<typeof NavigationMenuPrimitive.Viewport>
+>(({ className, ...props }, ref) => (
+  <div className={cn("absolute left-0 top-full flex justify-center")}>
+    <NavigationMenuPrimitive.Viewport
+      className={cn(
+        "origin-top-center relative mt-1.5 h-[var(--radix-navigation-menu-viewport-height)] w-full overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-lg data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-90 md:w-[var(--radix-navigation-menu-viewport-width)]",
+        className
+      )}
+      ref={ref}
+      {...props}
+    />
+  </div>
+))
+NavigationMenuViewport.displayName =
+  NavigationMenuPrimitive.Viewport.displayName
+
+const NavigationMenuIndicator = React.forwardRef<
+  React.ElementRef<typeof NavigationMenuPrimitive.Indicator>,
+  React.ComponentPropsWithoutRef<typeof NavigationMenuPrimitive.Indicator>
+>(({ className, ...props }, ref) => (
+  <NavigationMenuPrimitive.Indicator
+    ref={ref}
+    className={cn(
+      "top-full z-[1] flex h-1.5 items-end justify-center overflow-hidden data-[state=visible]:animate-in data-[state=hidden]:animate-out data-[state=hidden]:fade-out data-[state=visible]:fade-in",
+      className
+    )}
+    {...props}
+  >
+    <div className="relative top-[60%] h-2 w-2 rotate-45 rounded-tl-sm bg-border shadow-md" />
+  </NavigationMenuPrimitive.Indicator>
+))
+NavigationMenuIndicator.displayName =
+  NavigationMenuPrimitive.Indicator.displayName
+
+export {
+  navigationMenuTriggerStyle,
+  NavigationMenu,
+  NavigationMenuList,
+  NavigationMenuItem,
+  NavigationMenuContent,
+  NavigationMenuTrigger,
+  NavigationMenuLink,
+  NavigationMenuIndicator,
+  NavigationMenuViewport,
+}

frontend/components/ui/pagination.tsx

@@ -0,0 +1,117 @@
+import * as React from "react"
+import { ChevronLeft, ChevronRight, MoreHorizontal } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+import { ButtonProps, buttonVariants } from "@/components/ui/button"
+
+const Pagination = ({ className, ...props }: React.ComponentProps<"nav">) => (
+  <nav
+    role="navigation"
+    aria-label="pagination"
+    className={cn("mx-auto flex w-full justify-center", className)}
+    {...props}
+  />
+)
+Pagination.displayName = "Pagination"
+
+const PaginationContent = React.forwardRef<
+  HTMLUListElement,
+  React.ComponentProps<"ul">
+>(({ className, ...props }, ref) => (
+  <ul
+    ref={ref}
+    className={cn("flex flex-row items-center gap-1", className)}
+    {...props}
+  />
+))
+PaginationContent.displayName = "PaginationContent"
+
+const PaginationItem = React.forwardRef<
+  HTMLLIElement,
+  React.ComponentProps<"li">
+>(({ className, ...props }, ref) => (
+  <li ref={ref} className={cn("", className)} {...props} />
+))
+PaginationItem.displayName = "PaginationItem"
+
+type PaginationLinkProps = {
+  isActive?: boolean
+} & Pick<ButtonProps, "size"> &
+  React.ComponentProps<"a">
+
+const PaginationLink = ({
+  className,
+  isActive,
+  size = "icon",
+  ...props
+}: PaginationLinkProps) => (
+  <a
+    aria-current={isActive ? "page" : undefined}
+    className={cn(
+      buttonVariants({
+        variant: isActive ? "outline" : "ghost",
+        size,
+      }),
+      className
+    )}
+    {...props}
+  />
+)
+PaginationLink.displayName = "PaginationLink"
+
+const PaginationPrevious = ({
+  className,
+  ...props
+}: React.ComponentProps<typeof PaginationLink>) => (
+  <PaginationLink
+    aria-label="Go to previous page"
+    size="default"
+    className={cn("gap-1 pl-2.5", className)}
+    {...props}
+  >
+    <ChevronLeft className="h-4 w-4" />
+    <span>Previous</span>
+  </PaginationLink>
+)
+PaginationPrevious.displayName = "PaginationPrevious"
+
+const PaginationNext = ({
+  className,
+  ...props
+}: React.ComponentProps<typeof PaginationLink>) => (
+  <PaginationLink
+    aria-label="Go to next page"
+    size="default"
+    className={cn("gap-1 pr-2.5", className)}
+    {...props}
+  >
+    <span>Next</span>
+    <ChevronRight className="h-4 w-4" />
+  </PaginationLink>
+)
+PaginationNext.displayName = "PaginationNext"
+
+const PaginationEllipsis = ({
+  className,
+  ...props
+}: React.ComponentProps<"span">) => (
+  <span
+    aria-hidden
+    className={cn("flex h-9 w-9 items-center justify-center", className)}
+    {...props}
+  >
+    <MoreHorizontal className="h-4 w-4" />
+    <span className="sr-only">More pages</span>
+  </span>
+)
+PaginationEllipsis.displayName = "PaginationEllipsis"
+
+export {
+  Pagination,
+  PaginationContent,
+  PaginationEllipsis,
+  PaginationItem,
+  PaginationLink,
+  PaginationNext,
+  PaginationPrevious,
+}

frontend/components/ui/popover.tsx

@@ -0,0 +1,31 @@
+"use client"
+
+import * as React from "react"
+import * as PopoverPrimitive from "@radix-ui/react-popover"
+
+import { cn } from "@/lib/utils"
+
+const Popover = PopoverPrimitive.Root
+
+const PopoverTrigger = PopoverPrimitive.Trigger
+
+const PopoverContent = React.forwardRef<
+  React.ElementRef<typeof PopoverPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof PopoverPrimitive.Content>
+>(({ className, align = "center", sideOffset = 4, ...props }, ref) => (
+  <PopoverPrimitive.Portal>
+    <PopoverPrimitive.Content
+      ref={ref}
+      align={align}
+      sideOffset={sideOffset}
+      className={cn(
+        "z-50 w-72 rounded-md border bg-popover p-4 text-popover-foreground shadow-md outline-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        className
+      )}
+      {...props}
+    />
+  </PopoverPrimitive.Portal>
+))
+PopoverContent.displayName = PopoverPrimitive.Content.displayName
+
+export { Popover, PopoverTrigger, PopoverContent }

frontend/components/ui/progress.tsx

@@ -0,0 +1,28 @@
+"use client"
+
+import * as React from "react"
+import * as ProgressPrimitive from "@radix-ui/react-progress"
+
+import { cn } from "@/lib/utils"
+
+const Progress = React.forwardRef<
+  React.ElementRef<typeof ProgressPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof ProgressPrimitive.Root>
+>(({ className, value, ...props }, ref) => (
+  <ProgressPrimitive.Root
+    ref={ref}
+    className={cn(
+      "relative h-4 w-full overflow-hidden rounded-full bg-secondary",
+      className
+    )}
+    {...props}
+  >
+    <ProgressPrimitive.Indicator
+      className="h-full w-full flex-1 bg-primary transition-all"
+      style={{ transform: `translateX(-${100 - (value || 0)}%)` }}
+    />
+  </ProgressPrimitive.Root>
+))
+Progress.displayName = ProgressPrimitive.Root.displayName
+
+export { Progress }

frontend/components/ui/radio-group.tsx

@@ -0,0 +1,44 @@
+"use client"
+
+import * as React from "react"
+import * as RadioGroupPrimitive from "@radix-ui/react-radio-group"
+import { Circle } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const RadioGroup = React.forwardRef<
+  React.ElementRef<typeof RadioGroupPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof RadioGroupPrimitive.Root>
+>(({ className, ...props }, ref) => {
+  return (
+    <RadioGroupPrimitive.Root
+      className={cn("grid gap-2", className)}
+      {...props}
+      ref={ref}
+    />
+  )
+})
+RadioGroup.displayName = RadioGroupPrimitive.Root.displayName
+
+const RadioGroupItem = React.forwardRef<
+  React.ElementRef<typeof RadioGroupPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof RadioGroupPrimitive.Item>
+>(({ className, ...props }, ref) => {
+  return (
+    <RadioGroupPrimitive.Item
+      ref={ref}
+      className={cn(
+        "aspect-square h-4 w-4 rounded-full border border-primary text-primary ring-offset-background focus:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+        className
+      )}
+      {...props}
+    >
+      <RadioGroupPrimitive.Indicator className="flex items-center justify-center">
+        <Circle className="h-2.5 w-2.5 fill-current text-current" />
+      </RadioGroupPrimitive.Indicator>
+    </RadioGroupPrimitive.Item>
+  )
+})
+RadioGroupItem.displayName = RadioGroupPrimitive.Item.displayName
+
+export { RadioGroup, RadioGroupItem }

frontend/components/ui/resizable.tsx

@@ -0,0 +1,45 @@
+"use client"
+
+import { GripVertical } from "lucide-react"
+import * as ResizablePrimitive from "react-resizable-panels"
+
+import { cn } from "@/lib/utils"
+
+const ResizablePanelGroup = ({
+  className,
+  ...props
+}: React.ComponentProps<typeof ResizablePrimitive.PanelGroup>) => (
+  <ResizablePrimitive.PanelGroup
+    className={cn(
+      "flex h-full w-full data-[panel-group-direction=vertical]:flex-col",
+      className
+    )}
+    {...props}
+  />
+)
+
+const ResizablePanel = ResizablePrimitive.Panel
+
+const ResizableHandle = ({
+  withHandle,
+  className,
+  ...props
+}: React.ComponentProps<typeof ResizablePrimitive.PanelResizeHandle> & {
+  withHandle?: boolean
+}) => (
+  <ResizablePrimitive.PanelResizeHandle
+    className={cn(
+      "relative flex w-px items-center justify-center bg-border after:absolute after:inset-y-0 after:left-1/2 after:w-1 after:-translate-x-1/2 focus-visible:outline-none focus-visible:ring-1 focus-visible:ring-ring focus-visible:ring-offset-1 data-[panel-group-direction=vertical]:h-px data-[panel-group-direction=vertical]:w-full data-[panel-group-direction=vertical]:after:left-0 data-[panel-group-direction=vertical]:after:h-1 data-[panel-group-direction=vertical]:after:w-full data-[panel-group-direction=vertical]:after:-translate-y-1/2 data-[panel-group-direction=vertical]:after:translate-x-0 [&[data-panel-group-direction=vertical]>div]:rotate-90",
+      className
+    )}
+    {...props}
+  >
+    {withHandle && (
+      <div className="z-10 flex h-4 w-3 items-center justify-center rounded-sm border bg-border">
+        <GripVertical className="h-2.5 w-2.5" />
+      </div>
+    )}
+  </ResizablePrimitive.PanelResizeHandle>
+)
+
+export { ResizablePanelGroup, ResizablePanel, ResizableHandle }

frontend/components/ui/scroll-area.tsx

@@ -0,0 +1,48 @@
+"use client"
+
+import * as React from "react"
+import * as ScrollAreaPrimitive from "@radix-ui/react-scroll-area"
+
+import { cn } from "@/lib/utils"
+
+const ScrollArea = React.forwardRef<
+  React.ElementRef<typeof ScrollAreaPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.Root>
+>(({ className, children, ...props }, ref) => (
+  <ScrollAreaPrimitive.Root
+    ref={ref}
+    className={cn("relative overflow-hidden", className)}
+    {...props}
+  >
+    <ScrollAreaPrimitive.Viewport className="h-full w-full rounded-[inherit]">
+      {children}
+    </ScrollAreaPrimitive.Viewport>
+    <ScrollBar />
+    <ScrollAreaPrimitive.Corner />
+  </ScrollAreaPrimitive.Root>
+))
+ScrollArea.displayName = ScrollAreaPrimitive.Root.displayName
+
+const ScrollBar = React.forwardRef<
+  React.ElementRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>,
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>
+>(({ className, orientation = "vertical", ...props }, ref) => (
+  <ScrollAreaPrimitive.ScrollAreaScrollbar
+    ref={ref}
+    orientation={orientation}
+    className={cn(
+      "flex touch-none select-none transition-colors",
+      orientation === "vertical" &&
+        "h-full w-2.5 border-l border-l-transparent p-[1px]",
+      orientation === "horizontal" &&
+        "h-2.5 flex-col border-t border-t-transparent p-[1px]",
+      className
+    )}
+    {...props}
+  >
+    <ScrollAreaPrimitive.ScrollAreaThumb className="relative flex-1 rounded-full bg-border" />
+  </ScrollAreaPrimitive.ScrollAreaScrollbar>
+))
+ScrollBar.displayName = ScrollAreaPrimitive.ScrollAreaScrollbar.displayName
+
+export { ScrollArea, ScrollBar }

frontend/components/ui/select.tsx

@@ -0,0 +1,160 @@
+"use client"
+
+import * as React from "react"
+import * as SelectPrimitive from "@radix-ui/react-select"
+import { Check, ChevronDown, ChevronUp } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Select = SelectPrimitive.Root
+
+const SelectGroup = SelectPrimitive.Group
+
+const SelectValue = SelectPrimitive.Value
+
+const SelectTrigger = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Trigger
+    ref={ref}
+    className={cn(
+      "flex h-10 w-full items-center justify-between rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 [&>span]:line-clamp-1",
+      className
+    )}
+    {...props}
+  >
+    {children}
+    <SelectPrimitive.Icon asChild>
+      <ChevronDown className="h-4 w-4 opacity-50" />
+    </SelectPrimitive.Icon>
+  </SelectPrimitive.Trigger>
+))
+SelectTrigger.displayName = SelectPrimitive.Trigger.displayName
+
+const SelectScrollUpButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollUpButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollUpButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollUpButton
+    ref={ref}
+    className={cn(
+      "flex cursor-default items-center justify-center py-1",
+      className
+    )}
+    {...props}
+  >
+    <ChevronUp className="h-4 w-4" />
+  </SelectPrimitive.ScrollUpButton>
+))
+SelectScrollUpButton.displayName = SelectPrimitive.ScrollUpButton.displayName
+
+const SelectScrollDownButton = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.ScrollDownButton>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollDownButton>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.ScrollDownButton
+    ref={ref}
+    className={cn(
+      "flex cursor-default items-center justify-center py-1",
+      className
+    )}
+    {...props}
+  >
+    <ChevronDown className="h-4 w-4" />
+  </SelectPrimitive.ScrollDownButton>
+))
+SelectScrollDownButton.displayName =
+  SelectPrimitive.ScrollDownButton.displayName
+
+const SelectContent = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Content>
+>(({ className, children, position = "popper", ...props }, ref) => (
+  <SelectPrimitive.Portal>
+    <SelectPrimitive.Content
+      ref={ref}
+      className={cn(
+        "relative z-50 max-h-96 min-w-[8rem] overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+        position === "popper" &&
+          "data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1",
+        className
+      )}
+      position={position}
+      {...props}
+    >
+      <SelectScrollUpButton />
+      <SelectPrimitive.Viewport
+        className={cn(
+          "p-1",
+          position === "popper" &&
+            "h-[var(--radix-select-trigger-height)] w-full min-w-[var(--radix-select-trigger-width)]"
+        )}
+      >
+        {children}
+      </SelectPrimitive.Viewport>
+      <SelectScrollDownButton />
+    </SelectPrimitive.Content>
+  </SelectPrimitive.Portal>
+))
+SelectContent.displayName = SelectPrimitive.Content.displayName
+
+const SelectLabel = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Label>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Label>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Label
+    ref={ref}
+    className={cn("py-1.5 pl-8 pr-2 text-sm font-semibold", className)}
+    {...props}
+  />
+))
+SelectLabel.displayName = SelectPrimitive.Label.displayName
+
+const SelectItem = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Item>
+>(({ className, children, ...props }, ref) => (
+  <SelectPrimitive.Item
+    ref={ref}
+    className={cn(
+      "relative flex w-full cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50",
+      className
+    )}
+    {...props}
+  >
+    <span className="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <SelectPrimitive.ItemIndicator>
+        <Check className="h-4 w-4" />
+      </SelectPrimitive.ItemIndicator>
+    </span>
+
+    <SelectPrimitive.ItemText>{children}</SelectPrimitive.ItemText>
+  </SelectPrimitive.Item>
+))
+SelectItem.displayName = SelectPrimitive.Item.displayName
+
+const SelectSeparator = React.forwardRef<
+  React.ElementRef<typeof SelectPrimitive.Separator>,
+  React.ComponentPropsWithoutRef<typeof SelectPrimitive.Separator>
+>(({ className, ...props }, ref) => (
+  <SelectPrimitive.Separator
+    ref={ref}
+    className={cn("-mx-1 my-1 h-px bg-muted", className)}
+    {...props}
+  />
+))
+SelectSeparator.displayName = SelectPrimitive.Separator.displayName
+
+export {
+  Select,
+  SelectGroup,
+  SelectValue,
+  SelectTrigger,
+  SelectContent,
+  SelectLabel,
+  SelectItem,
+  SelectSeparator,
+  SelectScrollUpButton,
+  SelectScrollDownButton,
+}

frontend/components/ui/separator.tsx

@@ -0,0 +1,31 @@
+"use client"
+
+import * as React from "react"
+import * as SeparatorPrimitive from "@radix-ui/react-separator"
+
+import { cn } from "@/lib/utils"
+
+const Separator = React.forwardRef<
+  React.ElementRef<typeof SeparatorPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof SeparatorPrimitive.Root>
+>(
+  (
+    { className, orientation = "horizontal", decorative = true, ...props },
+    ref
+  ) => (
+    <SeparatorPrimitive.Root
+      ref={ref}
+      decorative={decorative}
+      orientation={orientation}
+      className={cn(
+        "shrink-0 bg-border",
+        orientation === "horizontal" ? "h-[1px] w-full" : "h-full w-[1px]",
+        className
+      )}
+      {...props}
+    />
+  )
+)
+Separator.displayName = SeparatorPrimitive.Root.displayName
+
+export { Separator }

frontend/components/ui/sheet.tsx

@@ -0,0 +1,140 @@
+"use client"
+
+import * as React from "react"
+import * as SheetPrimitive from "@radix-ui/react-dialog"
+import { cva, type VariantProps } from "class-variance-authority"
+import { X } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const Sheet = SheetPrimitive.Root
+
+const SheetTrigger = SheetPrimitive.Trigger
+
+const SheetClose = SheetPrimitive.Close
+
+const SheetPortal = SheetPrimitive.Portal
+
+const SheetOverlay = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Overlay>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Overlay>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Overlay
+    className={cn(
+      "fixed inset-0 z-50 bg-black/80  data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
+      className
+    )}
+    {...props}
+    ref={ref}
+  />
+))
+SheetOverlay.displayName = SheetPrimitive.Overlay.displayName
+
+const sheetVariants = cva(
+  "fixed z-50 gap-4 bg-background p-6 shadow-lg transition ease-in-out data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:duration-300 data-[state=open]:duration-500",
+  {
+    variants: {
+      side: {
+        top: "inset-x-0 top-0 border-b data-[state=closed]:slide-out-to-top data-[state=open]:slide-in-from-top",
+        bottom:
+          "inset-x-0 bottom-0 border-t data-[state=closed]:slide-out-to-bottom data-[state=open]:slide-in-from-bottom",
+        left: "inset-y-0 left-0 h-full w-3/4 border-r data-[state=closed]:slide-out-to-left data-[state=open]:slide-in-from-left sm:max-w-sm",
+        right:
+          "inset-y-0 right-0 h-full w-3/4  border-l data-[state=closed]:slide-out-to-right data-[state=open]:slide-in-from-right sm:max-w-sm",
+      },
+    },
+    defaultVariants: {
+      side: "right",
+    },
+  }
+)
+
+interface SheetContentProps
+  extends React.ComponentPropsWithoutRef<typeof SheetPrimitive.Content>,
+    VariantProps<typeof sheetVariants> {}
+
+const SheetContent = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Content>,
+  SheetContentProps
+>(({ side = "right", className, children, ...props }, ref) => (
+  <SheetPortal>
+    <SheetOverlay />
+    <SheetPrimitive.Content
+      ref={ref}
+      className={cn(sheetVariants({ side }), className)}
+      {...props}
+    >
+      {children}
+      <SheetPrimitive.Close className="absolute right-4 top-4 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-secondary">
+        <X className="h-4 w-4" />
+        <span className="sr-only">Close</span>
+      </SheetPrimitive.Close>
+    </SheetPrimitive.Content>
+  </SheetPortal>
+))
+SheetContent.displayName = SheetPrimitive.Content.displayName
+
+const SheetHeader = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col space-y-2 text-center sm:text-left",
+      className
+    )}
+    {...props}
+  />
+)
+SheetHeader.displayName = "SheetHeader"
+
+const SheetFooter = ({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) => (
+  <div
+    className={cn(
+      "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
+      className
+    )}
+    {...props}
+  />
+)
+SheetFooter.displayName = "SheetFooter"
+
+const SheetTitle = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Title>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Title>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Title
+    ref={ref}
+    className={cn("text-lg font-semibold text-foreground", className)}
+    {...props}
+  />
+))
+SheetTitle.displayName = SheetPrimitive.Title.displayName
+
+const SheetDescription = React.forwardRef<
+  React.ElementRef<typeof SheetPrimitive.Description>,
+  React.ComponentPropsWithoutRef<typeof SheetPrimitive.Description>
+>(({ className, ...props }, ref) => (
+  <SheetPrimitive.Description
+    ref={ref}
+    className={cn("text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+SheetDescription.displayName = SheetPrimitive.Description.displayName
+
+export {
+  Sheet,
+  SheetPortal,
+  SheetOverlay,
+  SheetTrigger,
+  SheetClose,
+  SheetContent,
+  SheetHeader,
+  SheetFooter,
+  SheetTitle,
+  SheetDescription,
+}

frontend/components/ui/sidebar.tsx

@@ -0,0 +1,763 @@
+"use client"
+
+import * as React from "react"
+import { Slot } from "@radix-ui/react-slot"
+import { VariantProps, cva } from "class-variance-authority"
+import { PanelLeft } from "lucide-react"
+
+import { useIsMobile } from "@/hooks/use-mobile"
+import { cn } from "@/lib/utils"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { Separator } from "@/components/ui/separator"
+import { Sheet, SheetContent } from "@/components/ui/sheet"
+import { Skeleton } from "@/components/ui/skeleton"
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from "@/components/ui/tooltip"
+
+const SIDEBAR_COOKIE_NAME = "sidebar:state"
+const SIDEBAR_COOKIE_MAX_AGE = 60 * 60 * 24 * 7
+const SIDEBAR_WIDTH = "16rem"
+const SIDEBAR_WIDTH_MOBILE = "18rem"
+const SIDEBAR_WIDTH_ICON = "3rem"
+const SIDEBAR_KEYBOARD_SHORTCUT = "b"
+
+type SidebarContext = {
+  state: "expanded" | "collapsed"
+  open: boolean
+  setOpen: (open: boolean) => void
+  openMobile: boolean
+  setOpenMobile: (open: boolean) => void
+  isMobile: boolean
+  toggleSidebar: () => void
+}
+
+const SidebarContext = React.createContext<SidebarContext | null>(null)
+
+function useSidebar() {
+  const context = React.useContext(SidebarContext)
+  if (!context) {
+    throw new Error("useSidebar must be used within a SidebarProvider.")
+  }
+
+  return context
+}
+
+const SidebarProvider = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div"> & {
+    defaultOpen?: boolean
+    open?: boolean
+    onOpenChange?: (open: boolean) => void
+  }
+>(
+  (
+    {
+      defaultOpen = true,
+      open: openProp,
+      onOpenChange: setOpenProp,
+      className,
+      style,
+      children,
+      ...props
+    },
+    ref
+  ) => {
+    const isMobile = useIsMobile()
+    const [openMobile, setOpenMobile] = React.useState(false)
+
+    // This is the internal state of the sidebar.
+    // We use openProp and setOpenProp for control from outside the component.
+    const [_open, _setOpen] = React.useState(defaultOpen)
+    const open = openProp ?? _open
+    const setOpen = React.useCallback(
+      (value: boolean | ((value: boolean) => boolean)) => {
+        const openState = typeof value === "function" ? value(open) : value
+        if (setOpenProp) {
+          setOpenProp(openState)
+        } else {
+          _setOpen(openState)
+        }
+
+        // This sets the cookie to keep the sidebar state.
+        document.cookie = `${SIDEBAR_COOKIE_NAME}=${openState}; path=/; max-age=${SIDEBAR_COOKIE_MAX_AGE}`
+      },
+      [setOpenProp, open]
+    )
+
+    // Helper to toggle the sidebar.
+    const toggleSidebar = React.useCallback(() => {
+      return isMobile
+        ? setOpenMobile((open) => !open)
+        : setOpen((open) => !open)
+    }, [isMobile, setOpen, setOpenMobile])
+
+    // Adds a keyboard shortcut to toggle the sidebar.
+    React.useEffect(() => {
+      const handleKeyDown = (event: KeyboardEvent) => {
+        if (
+          event.key === SIDEBAR_KEYBOARD_SHORTCUT &&
+          (event.metaKey || event.ctrlKey)
+        ) {
+          event.preventDefault()
+          toggleSidebar()
+        }
+      }
+
+      window.addEventListener("keydown", handleKeyDown)
+      return () => window.removeEventListener("keydown", handleKeyDown)
+    }, [toggleSidebar])
+
+    // We add a state so that we can do data-state="expanded" or "collapsed".
+    // This makes it easier to style the sidebar with Tailwind classes.
+    const state = open ? "expanded" : "collapsed"
+
+    const contextValue = React.useMemo<SidebarContext>(
+      () => ({
+        state,
+        open,
+        setOpen,
+        isMobile,
+        openMobile,
+        setOpenMobile,
+        toggleSidebar,
+      }),
+      [state, open, setOpen, isMobile, openMobile, setOpenMobile, toggleSidebar]
+    )
+
+    return (
+      <SidebarContext.Provider value={contextValue}>
+        <TooltipProvider delayDuration={0}>
+          <div
+            style={
+              {
+                "--sidebar-width": SIDEBAR_WIDTH,
+                "--sidebar-width-icon": SIDEBAR_WIDTH_ICON,
+                ...style,
+              } as React.CSSProperties
+            }
+            className={cn(
+              "group/sidebar-wrapper flex min-h-svh w-full has-[[data-variant=inset]]:bg-sidebar",
+              className
+            )}
+            ref={ref}
+            {...props}
+          >
+            {children}
+          </div>
+        </TooltipProvider>
+      </SidebarContext.Provider>
+    )
+  }
+)
+SidebarProvider.displayName = "SidebarProvider"
+
+const Sidebar = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div"> & {
+    side?: "left" | "right"
+    variant?: "sidebar" | "floating" | "inset"
+    collapsible?: "offcanvas" | "icon" | "none"
+  }
+>(
+  (
+    {
+      side = "left",
+      variant = "sidebar",
+      collapsible = "offcanvas",
+      className,
+      children,
+      ...props
+    },
+    ref
+  ) => {
+    const { isMobile, state, openMobile, setOpenMobile } = useSidebar()
+
+    if (collapsible === "none") {
+      return (
+        <div
+          className={cn(
+            "flex h-full w-[--sidebar-width] flex-col bg-sidebar text-sidebar-foreground",
+            className
+          )}
+          ref={ref}
+          {...props}
+        >
+          {children}
+        </div>
+      )
+    }
+
+    if (isMobile) {
+      return (
+        <Sheet open={openMobile} onOpenChange={setOpenMobile} {...props}>
+          <SheetContent
+            data-sidebar="sidebar"
+            data-mobile="true"
+            className="w-[--sidebar-width] bg-sidebar p-0 text-sidebar-foreground [&>button]:hidden"
+            style={
+              {
+                "--sidebar-width": SIDEBAR_WIDTH_MOBILE,
+              } as React.CSSProperties
+            }
+            side={side}
+          >
+            <div className="flex h-full w-full flex-col">{children}</div>
+          </SheetContent>
+        </Sheet>
+      )
+    }
+
+    return (
+      <div
+        ref={ref}
+        className="group peer hidden md:block text-sidebar-foreground"
+        data-state={state}
+        data-collapsible={state === "collapsed" ? collapsible : ""}
+        data-variant={variant}
+        data-side={side}
+      >
+        {/* This is what handles the sidebar gap on desktop */}
+        <div
+          className={cn(
+            "duration-200 relative h-svh w-[--sidebar-width] bg-transparent transition-[width] ease-linear",
+            "group-data-[collapsible=offcanvas]:w-0",
+            "group-data-[side=right]:rotate-180",
+            variant === "floating" || variant === "inset"
+              ? "group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)_+_theme(spacing.4))]"
+              : "group-data-[collapsible=icon]:w-[--sidebar-width-icon]"
+          )}
+        />
+        <div
+          className={cn(
+            "duration-200 fixed inset-y-0 z-10 hidden h-svh w-[--sidebar-width] transition-[left,right,width] ease-linear md:flex",
+            side === "left"
+              ? "left-0 group-data-[collapsible=offcanvas]:left-[calc(var(--sidebar-width)*-1)]"
+              : "right-0 group-data-[collapsible=offcanvas]:right-[calc(var(--sidebar-width)*-1)]",
+            // Adjust the padding for floating and inset variants.
+            variant === "floating" || variant === "inset"
+              ? "p-2 group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)_+_theme(spacing.4)_+2px)]"
+              : "group-data-[collapsible=icon]:w-[--sidebar-width-icon] group-data-[side=left]:border-r group-data-[side=right]:border-l",
+            className
+          )}
+          {...props}
+        >
+          <div
+            data-sidebar="sidebar"
+            className="flex h-full w-full flex-col bg-sidebar group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:border group-data-[variant=floating]:border-sidebar-border group-data-[variant=floating]:shadow"
+          >
+            {children}
+          </div>
+        </div>
+      </div>
+    )
+  }
+)
+Sidebar.displayName = "Sidebar"
+
+const SidebarTrigger = React.forwardRef<
+  React.ElementRef<typeof Button>,
+  React.ComponentProps<typeof Button>
+>(({ className, onClick, ...props }, ref) => {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <Button
+      ref={ref}
+      data-sidebar="trigger"
+      variant="ghost"
+      size="icon"
+      className={cn("h-7 w-7", className)}
+      onClick={(event) => {
+        onClick?.(event)
+        toggleSidebar()
+      }}
+      {...props}
+    >
+      <PanelLeft />
+      <span className="sr-only">Toggle Sidebar</span>
+    </Button>
+  )
+})
+SidebarTrigger.displayName = "SidebarTrigger"
+
+const SidebarRail = React.forwardRef<
+  HTMLButtonElement,
+  React.ComponentProps<"button">
+>(({ className, ...props }, ref) => {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <button
+      ref={ref}
+      data-sidebar="rail"
+      aria-label="Toggle Sidebar"
+      tabIndex={-1}
+      onClick={toggleSidebar}
+      title="Toggle Sidebar"
+      className={cn(
+        "absolute inset-y-0 z-20 hidden w-4 -translate-x-1/2 transition-all ease-linear after:absolute after:inset-y-0 after:left-1/2 after:w-[2px] hover:after:bg-sidebar-border group-data-[side=left]:-right-4 group-data-[side=right]:left-0 sm:flex",
+        "[[data-side=left]_&]:cursor-w-resize [[data-side=right]_&]:cursor-e-resize",
+        "[[data-side=left][data-state=collapsed]_&]:cursor-e-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize",
+        "group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:left-full group-data-[collapsible=offcanvas]:hover:bg-sidebar",
+        "[[data-side=left][data-collapsible=offcanvas]_&]:-right-2",
+        "[[data-side=right][data-collapsible=offcanvas]_&]:-left-2",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarRail.displayName = "SidebarRail"
+
+const SidebarInset = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"main">
+>(({ className, ...props }, ref) => {
+  return (
+    <main
+      ref={ref}
+      className={cn(
+        "relative flex min-h-svh flex-1 flex-col bg-background",
+        "peer-data-[variant=inset]:min-h-[calc(100svh-theme(spacing.4))] md:peer-data-[variant=inset]:m-2 md:peer-data-[state=collapsed]:peer-data-[variant=inset]:ml-2 md:peer-data-[variant=inset]:ml-0 md:peer-data-[variant=inset]:rounded-xl md:peer-data-[variant=inset]:shadow",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarInset.displayName = "SidebarInset"
+
+const SidebarInput = React.forwardRef<
+  React.ElementRef<typeof Input>,
+  React.ComponentProps<typeof Input>
+>(({ className, ...props }, ref) => {
+  return (
+    <Input
+      ref={ref}
+      data-sidebar="input"
+      className={cn(
+        "h-8 w-full bg-background shadow-none focus-visible:ring-2 focus-visible:ring-sidebar-ring",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarInput.displayName = "SidebarInput"
+
+const SidebarHeader = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div">
+>(({ className, ...props }, ref) => {
+  return (
+    <div
+      ref={ref}
+      data-sidebar="header"
+      className={cn("flex flex-col gap-2 p-2", className)}
+      {...props}
+    />
+  )
+})
+SidebarHeader.displayName = "SidebarHeader"
+
+const SidebarFooter = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div">
+>(({ className, ...props }, ref) => {
+  return (
+    <div
+      ref={ref}
+      data-sidebar="footer"
+      className={cn("flex flex-col gap-2 p-2", className)}
+      {...props}
+    />
+  )
+})
+SidebarFooter.displayName = "SidebarFooter"
+
+const SidebarSeparator = React.forwardRef<
+  React.ElementRef<typeof Separator>,
+  React.ComponentProps<typeof Separator>
+>(({ className, ...props }, ref) => {
+  return (
+    <Separator
+      ref={ref}
+      data-sidebar="separator"
+      className={cn("mx-2 w-auto bg-sidebar-border", className)}
+      {...props}
+    />
+  )
+})
+SidebarSeparator.displayName = "SidebarSeparator"
+
+const SidebarContent = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div">
+>(({ className, ...props }, ref) => {
+  return (
+    <div
+      ref={ref}
+      data-sidebar="content"
+      className={cn(
+        "flex min-h-0 flex-1 flex-col gap-2 overflow-auto group-data-[collapsible=icon]:overflow-hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarContent.displayName = "SidebarContent"
+
+const SidebarGroup = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div">
+>(({ className, ...props }, ref) => {
+  return (
+    <div
+      ref={ref}
+      data-sidebar="group"
+      className={cn("relative flex w-full min-w-0 flex-col p-2", className)}
+      {...props}
+    />
+  )
+})
+SidebarGroup.displayName = "SidebarGroup"
+
+const SidebarGroupLabel = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div"> & { asChild?: boolean }
+>(({ className, asChild = false, ...props }, ref) => {
+  const Comp = asChild ? Slot : "div"
+
+  return (
+    <Comp
+      ref={ref}
+      data-sidebar="group-label"
+      className={cn(
+        "duration-200 flex h-8 shrink-0 items-center rounded-md px-2 text-xs font-medium text-sidebar-foreground/70 outline-none ring-sidebar-ring transition-[margin,opa] ease-linear focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
+        "group-data-[collapsible=icon]:-mt-8 group-data-[collapsible=icon]:opacity-0",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarGroupLabel.displayName = "SidebarGroupLabel"
+
+const SidebarGroupAction = React.forwardRef<
+  HTMLButtonElement,
+  React.ComponentProps<"button"> & { asChild?: boolean }
+>(({ className, asChild = false, ...props }, ref) => {
+  const Comp = asChild ? Slot : "button"
+
+  return (
+    <Comp
+      ref={ref}
+      data-sidebar="group-action"
+      className={cn(
+        "absolute right-3 top-3.5 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground outline-none ring-sidebar-ring transition-transform hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0",
+        // Increases the hit area of the button on mobile.
+        "after:absolute after:-inset-2 after:md:hidden",
+        "group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarGroupAction.displayName = "SidebarGroupAction"
+
+const SidebarGroupContent = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div">
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    data-sidebar="group-content"
+    className={cn("w-full text-sm", className)}
+    {...props}
+  />
+))
+SidebarGroupContent.displayName = "SidebarGroupContent"
+
+const SidebarMenu = React.forwardRef<
+  HTMLUListElement,
+  React.ComponentProps<"ul">
+>(({ className, ...props }, ref) => (
+  <ul
+    ref={ref}
+    data-sidebar="menu"
+    className={cn("flex w-full min-w-0 flex-col gap-1", className)}
+    {...props}
+  />
+))
+SidebarMenu.displayName = "SidebarMenu"
+
+const SidebarMenuItem = React.forwardRef<
+  HTMLLIElement,
+  React.ComponentProps<"li">
+>(({ className, ...props }, ref) => (
+  <li
+    ref={ref}
+    data-sidebar="menu-item"
+    className={cn("group/menu-item relative", className)}
+    {...props}
+  />
+))
+SidebarMenuItem.displayName = "SidebarMenuItem"
+
+const sidebarMenuButtonVariants = cva(
+  "peer/menu-button flex w-full items-center gap-2 overflow-hidden rounded-md p-2 text-left text-sm outline-none ring-sidebar-ring transition-[width,height,padding] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 group-has-[[data-sidebar=menu-action]]/menu-item:pr-8 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[active=true]:bg-sidebar-accent data-[active=true]:font-medium data-[active=true]:text-sidebar-accent-foreground data-[state=open]:hover:bg-sidebar-accent data-[state=open]:hover:text-sidebar-accent-foreground group-data-[collapsible=icon]:!size-8 group-data-[collapsible=icon]:!p-2 [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0",
+  {
+    variants: {
+      variant: {
+        default: "hover:bg-sidebar-accent hover:text-sidebar-accent-foreground",
+        outline:
+          "bg-background shadow-[0_0_0_1px_hsl(var(--sidebar-border))] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground hover:shadow-[0_0_0_1px_hsl(var(--sidebar-accent))]",
+      },
+      size: {
+        default: "h-8 text-sm",
+        sm: "h-7 text-xs",
+        lg: "h-12 text-sm group-data-[collapsible=icon]:!p-0",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+const SidebarMenuButton = React.forwardRef<
+  HTMLButtonElement,
+  React.ComponentProps<"button"> & {
+    asChild?: boolean
+    isActive?: boolean
+    tooltip?: string | React.ComponentProps<typeof TooltipContent>
+  } & VariantProps<typeof sidebarMenuButtonVariants>
+>(
+  (
+    {
+      asChild = false,
+      isActive = false,
+      variant = "default",
+      size = "default",
+      tooltip,
+      className,
+      ...props
+    },
+    ref
+  ) => {
+    const Comp = asChild ? Slot : "button"
+    const { isMobile, state } = useSidebar()
+
+    const button = (
+      <Comp
+        ref={ref}
+        data-sidebar="menu-button"
+        data-size={size}
+        data-active={isActive}
+        className={cn(sidebarMenuButtonVariants({ variant, size }), className)}
+        {...props}
+      />
+    )
+
+    if (!tooltip) {
+      return button
+    }
+
+    if (typeof tooltip === "string") {
+      tooltip = {
+        children: tooltip,
+      }
+    }
+
+    return (
+      <Tooltip>
+        <TooltipTrigger asChild>{button}</TooltipTrigger>
+        <TooltipContent
+          side="right"
+          align="center"
+          hidden={state !== "collapsed" || isMobile}
+          {...tooltip}
+        />
+      </Tooltip>
+    )
+  }
+)
+SidebarMenuButton.displayName = "SidebarMenuButton"
+
+const SidebarMenuAction = React.forwardRef<
+  HTMLButtonElement,
+  React.ComponentProps<"button"> & {
+    asChild?: boolean
+    showOnHover?: boolean
+  }
+>(({ className, asChild = false, showOnHover = false, ...props }, ref) => {
+  const Comp = asChild ? Slot : "button"
+
+  return (
+    <Comp
+      ref={ref}
+      data-sidebar="menu-action"
+      className={cn(
+        "absolute right-1 top-1.5 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground outline-none ring-sidebar-ring transition-transform hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 peer-hover/menu-button:text-sidebar-accent-foreground [&>svg]:size-4 [&>svg]:shrink-0",
+        // Increases the hit area of the button on mobile.
+        "after:absolute after:-inset-2 after:md:hidden",
+        "peer-data-[size=sm]/menu-button:top-1",
+        "peer-data-[size=default]/menu-button:top-1.5",
+        "peer-data-[size=lg]/menu-button:top-2.5",
+        "group-data-[collapsible=icon]:hidden",
+        showOnHover &&
+          "group-focus-within/menu-item:opacity-100 group-hover/menu-item:opacity-100 data-[state=open]:opacity-100 peer-data-[active=true]/menu-button:text-sidebar-accent-foreground md:opacity-0",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarMenuAction.displayName = "SidebarMenuAction"
+
+const SidebarMenuBadge = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div">
+>(({ className, ...props }, ref) => (
+  <div
+    ref={ref}
+    data-sidebar="menu-badge"
+    className={cn(
+      "absolute right-1 flex h-5 min-w-5 items-center justify-center rounded-md px-1 text-xs font-medium tabular-nums text-sidebar-foreground select-none pointer-events-none",
+      "peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[active=true]/menu-button:text-sidebar-accent-foreground",
+      "peer-data-[size=sm]/menu-button:top-1",
+      "peer-data-[size=default]/menu-button:top-1.5",
+      "peer-data-[size=lg]/menu-button:top-2.5",
+      "group-data-[collapsible=icon]:hidden",
+      className
+    )}
+    {...props}
+  />
+))
+SidebarMenuBadge.displayName = "SidebarMenuBadge"
+
+const SidebarMenuSkeleton = React.forwardRef<
+  HTMLDivElement,
+  React.ComponentProps<"div"> & {
+    showIcon?: boolean
+  }
+>(({ className, showIcon = false, ...props }, ref) => {
+  // Random width between 50 to 90%.
+  const width = React.useMemo(() => {
+    return `${Math.floor(Math.random() * 40) + 50}%`
+  }, [])
+
+  return (
+    <div
+      ref={ref}
+      data-sidebar="menu-skeleton"
+      className={cn("rounded-md h-8 flex gap-2 px-2 items-center", className)}
+      {...props}
+    >
+      {showIcon && (
+        <Skeleton
+          className="size-4 rounded-md"
+          data-sidebar="menu-skeleton-icon"
+        />
+      )}
+      <Skeleton
+        className="h-4 flex-1 max-w-[--skeleton-width]"
+        data-sidebar="menu-skeleton-text"
+        style={
+          {
+            "--skeleton-width": width,
+          } as React.CSSProperties
+        }
+      />
+    </div>
+  )
+})
+SidebarMenuSkeleton.displayName = "SidebarMenuSkeleton"
+
+const SidebarMenuSub = React.forwardRef<
+  HTMLUListElement,
+  React.ComponentProps<"ul">
+>(({ className, ...props }, ref) => (
+  <ul
+    ref={ref}
+    data-sidebar="menu-sub"
+    className={cn(
+      "mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-l border-sidebar-border px-2.5 py-0.5",
+      "group-data-[collapsible=icon]:hidden",
+      className
+    )}
+    {...props}
+  />
+))
+SidebarMenuSub.displayName = "SidebarMenuSub"
+
+const SidebarMenuSubItem = React.forwardRef<
+  HTMLLIElement,
+  React.ComponentProps<"li">
+>(({ ...props }, ref) => <li ref={ref} {...props} />)
+SidebarMenuSubItem.displayName = "SidebarMenuSubItem"
+
+const SidebarMenuSubButton = React.forwardRef<
+  HTMLAnchorElement,
+  React.ComponentProps<"a"> & {
+    asChild?: boolean
+    size?: "sm" | "md"
+    isActive?: boolean
+  }
+>(({ asChild = false, size = "md", isActive, className, ...props }, ref) => {
+  const Comp = asChild ? Slot : "a"
+
+  return (
+    <Comp
+      ref={ref}
+      data-sidebar="menu-sub-button"
+      data-size={size}
+      data-active={isActive}
+      className={cn(
+        "flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground outline-none ring-sidebar-ring hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground",
+        "data-[active=true]:bg-sidebar-accent data-[active=true]:text-sidebar-accent-foreground",
+        size === "sm" && "text-xs",
+        size === "md" && "text-sm",
+        "group-data-[collapsible=icon]:hidden",
+        className
+      )}
+      {...props}
+    />
+  )
+})
+SidebarMenuSubButton.displayName = "SidebarMenuSubButton"
+
+export {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarGroup,
+  SidebarGroupAction,
+  SidebarGroupContent,
+  SidebarGroupLabel,
+  SidebarHeader,
+  SidebarInput,
+  SidebarInset,
+  SidebarMenu,
+  SidebarMenuAction,
+  SidebarMenuBadge,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  SidebarMenuSkeleton,
+  SidebarMenuSub,
+  SidebarMenuSubButton,
+  SidebarMenuSubItem,
+  SidebarProvider,
+  SidebarRail,
+  SidebarSeparator,
+  SidebarTrigger,
+  useSidebar,
+}

frontend/components/ui/skeleton.tsx

@@ -0,0 +1,15 @@
+import { cn } from "@/lib/utils"
+
+function Skeleton({
+  className,
+  ...props
+}: React.HTMLAttributes<HTMLDivElement>) {
+  return (
+    <div
+      className={cn("animate-pulse rounded-md bg-muted", className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }

frontend/components/ui/slider.tsx

@@ -0,0 +1,28 @@
+"use client"
+
+import * as React from "react"
+import * as SliderPrimitive from "@radix-ui/react-slider"
+
+import { cn } from "@/lib/utils"
+
+const Slider = React.forwardRef<
+  React.ElementRef<typeof SliderPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof SliderPrimitive.Root>
+>(({ className, ...props }, ref) => (
+  <SliderPrimitive.Root
+    ref={ref}
+    className={cn(
+      "relative flex w-full touch-none select-none items-center",
+      className
+    )}
+    {...props}
+  >
+    <SliderPrimitive.Track className="relative h-2 w-full grow overflow-hidden rounded-full bg-secondary">
+      <SliderPrimitive.Range className="absolute h-full bg-primary" />
+    </SliderPrimitive.Track>
+    <SliderPrimitive.Thumb className="block h-5 w-5 rounded-full border-2 border-primary bg-background ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50" />
+  </SliderPrimitive.Root>
+))
+Slider.displayName = SliderPrimitive.Root.displayName
+
+export { Slider }

frontend/components/ui/sonner.tsx

@@ -0,0 +1,31 @@
+"use client"
+
+import { useTheme } from "next-themes"
+import { Toaster as Sonner } from "sonner"
+
+type ToasterProps = React.ComponentProps<typeof Sonner>
+
+const Toaster = ({ ...props }: ToasterProps) => {
+  const { theme = "system" } = useTheme()
+
+  return (
+    <Sonner
+      theme={theme as ToasterProps["theme"]}
+      className="toaster group"
+      toastOptions={{
+        classNames: {
+          toast:
+            "group toast group-[.toaster]:bg-background group-[.toaster]:text-foreground group-[.toaster]:border-border group-[.toaster]:shadow-lg",
+          description: "group-[.toast]:text-muted-foreground",
+          actionButton:
+            "group-[.toast]:bg-primary group-[.toast]:text-primary-foreground",
+          cancelButton:
+            "group-[.toast]:bg-muted group-[.toast]:text-muted-foreground",
+        },
+      }}
+      {...props}
+    />
+  )
+}
+
+export { Toaster }

frontend/components/ui/switch.tsx

@@ -0,0 +1,29 @@
+"use client"
+
+import * as React from "react"
+import * as SwitchPrimitives from "@radix-ui/react-switch"
+
+import { cn } from "@/lib/utils"
+
+const Switch = React.forwardRef<
+  React.ElementRef<typeof SwitchPrimitives.Root>,
+  React.ComponentPropsWithoutRef<typeof SwitchPrimitives.Root>
+>(({ className, ...props }, ref) => (
+  <SwitchPrimitives.Root
+    className={cn(
+      "peer inline-flex h-6 w-11 shrink-0 cursor-pointer items-center rounded-full border-2 border-transparent transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=unchecked]:bg-input",
+      className
+    )}
+    {...props}
+    ref={ref}
+  >
+    <SwitchPrimitives.Thumb
+      className={cn(
+        "pointer-events-none block h-5 w-5 rounded-full bg-background shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-5 data-[state=unchecked]:translate-x-0"
+      )}
+    />
+  </SwitchPrimitives.Root>
+))
+Switch.displayName = SwitchPrimitives.Root.displayName
+
+export { Switch }

frontend/components/ui/table.tsx

@@ -0,0 +1,117 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+const Table = React.forwardRef<
+  HTMLTableElement,
+  React.HTMLAttributes<HTMLTableElement>
+>(({ className, ...props }, ref) => (
+  <div className="relative w-full overflow-auto">
+    <table
+      ref={ref}
+      className={cn("w-full caption-bottom text-sm", className)}
+      {...props}
+    />
+  </div>
+))
+Table.displayName = "Table"
+
+const TableHeader = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <thead ref={ref} className={cn("[&_tr]:border-b", className)} {...props} />
+))
+TableHeader.displayName = "TableHeader"
+
+const TableBody = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <tbody
+    ref={ref}
+    className={cn("[&_tr:last-child]:border-0", className)}
+    {...props}
+  />
+))
+TableBody.displayName = "TableBody"
+
+const TableFooter = React.forwardRef<
+  HTMLTableSectionElement,
+  React.HTMLAttributes<HTMLTableSectionElement>
+>(({ className, ...props }, ref) => (
+  <tfoot
+    ref={ref}
+    className={cn(
+      "border-t bg-muted/50 font-medium [&>tr]:last:border-b-0",
+      className
+    )}
+    {...props}
+  />
+))
+TableFooter.displayName = "TableFooter"
+
+const TableRow = React.forwardRef<
+  HTMLTableRowElement,
+  React.HTMLAttributes<HTMLTableRowElement>
+>(({ className, ...props }, ref) => (
+  <tr
+    ref={ref}
+    className={cn(
+      "border-b transition-colors hover:bg-muted/50 data-[state=selected]:bg-muted",
+      className
+    )}
+    {...props}
+  />
+))
+TableRow.displayName = "TableRow"
+
+const TableHead = React.forwardRef<
+  HTMLTableCellElement,
+  React.ThHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <th
+    ref={ref}
+    className={cn(
+      "h-12 px-4 text-left align-middle font-medium text-muted-foreground [&:has([role=checkbox])]:pr-0",
+      className
+    )}
+    {...props}
+  />
+))
+TableHead.displayName = "TableHead"
+
+const TableCell = React.forwardRef<
+  HTMLTableCellElement,
+  React.TdHTMLAttributes<HTMLTableCellElement>
+>(({ className, ...props }, ref) => (
+  <td
+    ref={ref}
+    className={cn("p-4 align-middle [&:has([role=checkbox])]:pr-0", className)}
+    {...props}
+  />
+))
+TableCell.displayName = "TableCell"
+
+const TableCaption = React.forwardRef<
+  HTMLTableCaptionElement,
+  React.HTMLAttributes<HTMLTableCaptionElement>
+>(({ className, ...props }, ref) => (
+  <caption
+    ref={ref}
+    className={cn("mt-4 text-sm text-muted-foreground", className)}
+    {...props}
+  />
+))
+TableCaption.displayName = "TableCaption"
+
+export {
+  Table,
+  TableHeader,
+  TableBody,
+  TableFooter,
+  TableHead,
+  TableRow,
+  TableCell,
+  TableCaption,
+}

frontend/components/ui/tabs.tsx

@@ -0,0 +1,55 @@
+"use client"
+
+import * as React from "react"
+import * as TabsPrimitive from "@radix-ui/react-tabs"
+
+import { cn } from "@/lib/utils"
+
+const Tabs = TabsPrimitive.Root
+
+const TabsList = React.forwardRef<
+  React.ElementRef<typeof TabsPrimitive.List>,
+  React.ComponentPropsWithoutRef<typeof TabsPrimitive.List>
+>(({ className, ...props }, ref) => (
+  <TabsPrimitive.List
+    ref={ref}
+    className={cn(
+      "inline-flex h-10 items-center justify-center rounded-md bg-muted p-1 text-muted-foreground",
+      className
+    )}
+    {...props}
+  />
+))
+TabsList.displayName = TabsPrimitive.List.displayName
+
+const TabsTrigger = React.forwardRef<
+  React.ElementRef<typeof TabsPrimitive.Trigger>,
+  React.ComponentPropsWithoutRef<typeof TabsPrimitive.Trigger>
+>(({ className, ...props }, ref) => (
+  <TabsPrimitive.Trigger
+    ref={ref}
+    className={cn(
+      "inline-flex items-center justify-center whitespace-nowrap rounded-sm px-3 py-1.5 text-sm font-medium ring-offset-background transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm",
+      className
+    )}
+    {...props}
+  />
+))
+TabsTrigger.displayName = TabsPrimitive.Trigger.displayName
+
+const TabsContent = React.forwardRef<
+  React.ElementRef<typeof TabsPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof TabsPrimitive.Content>
+>(({ className, ...props }, ref) => (
+  <TabsPrimitive.Content
+    ref={ref}
+    className={cn(
+      "mt-2 ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2",
+      className
+    )}
+    {...props}
+  />
+))
+TabsContent.displayName = TabsPrimitive.Content.displayName
+
+export { Tabs, TabsList, TabsTrigger, TabsContent }

frontend/components/ui/textarea.tsx

@@ -0,0 +1,22 @@
+import * as React from "react"
+
+import { cn } from "@/lib/utils"
+
+const Textarea = React.forwardRef<
+  HTMLTextAreaElement,
+  React.ComponentProps<"textarea">
+>(({ className, ...props }, ref) => {
+  return (
+    <textarea
+      className={cn(
+        "flex min-h-[80px] w-full rounded-md border border-input bg-background px-3 py-2 text-base ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+        className
+      )}
+      ref={ref}
+      {...props}
+    />
+  )
+})
+Textarea.displayName = "Textarea"
+
+export { Textarea }

frontend/components/ui/toast.tsx

@@ -0,0 +1,129 @@
+"use client"
+
+import * as React from "react"
+import * as ToastPrimitives from "@radix-ui/react-toast"
+import { cva, type VariantProps } from "class-variance-authority"
+import { X } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const ToastProvider = ToastPrimitives.Provider
+
+const ToastViewport = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Viewport>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Viewport>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Viewport
+    ref={ref}
+    className={cn(
+      "fixed top-0 z-[100] flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
+      className
+    )}
+    {...props}
+  />
+))
+ToastViewport.displayName = ToastPrimitives.Viewport.displayName
+
+const toastVariants = cva(
+  "group pointer-events-auto relative flex w-full items-center justify-between space-x-4 overflow-hidden rounded-md border p-6 pr-8 shadow-lg transition-all data-[swipe=cancel]:translate-x-0 data-[swipe=end]:translate-x-[var(--radix-toast-swipe-end-x)] data-[swipe=move]:translate-x-[var(--radix-toast-swipe-move-x)] data-[swipe=move]:transition-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[swipe=end]:animate-out data-[state=closed]:fade-out-80 data-[state=closed]:slide-out-to-right-full data-[state=open]:slide-in-from-top-full data-[state=open]:sm:slide-in-from-bottom-full",
+  {
+    variants: {
+      variant: {
+        default: "border bg-background text-foreground",
+        destructive:
+          "destructive group border-destructive bg-destructive text-destructive-foreground",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+const Toast = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Root>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Root> &
+    VariantProps<typeof toastVariants>
+>(({ className, variant, ...props }, ref) => {
+  return (
+    <ToastPrimitives.Root
+      ref={ref}
+      className={cn(toastVariants({ variant }), className)}
+      {...props}
+    />
+  )
+})
+Toast.displayName = ToastPrimitives.Root.displayName
+
+const ToastAction = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Action>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Action>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Action
+    ref={ref}
+    className={cn(
+      "inline-flex h-8 shrink-0 items-center justify-center rounded-md border bg-transparent px-3 text-sm font-medium ring-offset-background transition-colors hover:bg-secondary focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 group-[.destructive]:border-muted/40 group-[.destructive]:hover:border-destructive/30 group-[.destructive]:hover:bg-destructive group-[.destructive]:hover:text-destructive-foreground group-[.destructive]:focus:ring-destructive",
+      className
+    )}
+    {...props}
+  />
+))
+ToastAction.displayName = ToastPrimitives.Action.displayName
+
+const ToastClose = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Close>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Close>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Close
+    ref={ref}
+    className={cn(
+      "absolute right-2 top-2 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-none focus:ring-2 group-hover:opacity-100 group-[.destructive]:text-red-300 group-[.destructive]:hover:text-red-50 group-[.destructive]:focus:ring-red-400 group-[.destructive]:focus:ring-offset-red-600",
+      className
+    )}
+    toast-close=""
+    {...props}
+  >
+    <X className="h-4 w-4" />
+  </ToastPrimitives.Close>
+))
+ToastClose.displayName = ToastPrimitives.Close.displayName
+
+const ToastTitle = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Title>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Title>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Title
+    ref={ref}
+    className={cn("text-sm font-semibold", className)}
+    {...props}
+  />
+))
+ToastTitle.displayName = ToastPrimitives.Title.displayName
+
+const ToastDescription = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Description>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Description>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Description
+    ref={ref}
+    className={cn("text-sm opacity-90", className)}
+    {...props}
+  />
+))
+ToastDescription.displayName = ToastPrimitives.Description.displayName
+
+type ToastProps = React.ComponentPropsWithoutRef<typeof Toast>
+
+type ToastActionElement = React.ReactElement<typeof ToastAction>
+
+export {
+  type ToastProps,
+  type ToastActionElement,
+  ToastProvider,
+  ToastViewport,
+  Toast,
+  ToastTitle,
+  ToastDescription,
+  ToastClose,
+  ToastAction,
+}

frontend/components/ui/toaster.tsx

@@ -0,0 +1,35 @@
+"use client"
+
+import { useToast } from "@/hooks/use-toast"
+import {
+  Toast,
+  ToastClose,
+  ToastDescription,
+  ToastProvider,
+  ToastTitle,
+  ToastViewport,
+} from "@/components/ui/toast"
+
+export function Toaster() {
+  const { toasts } = useToast()
+
+  return (
+    <ToastProvider>
+      {toasts.map(function ({ id, title, description, action, ...props }) {
+        return (
+          <Toast key={id} {...props}>
+            <div className="grid gap-1">
+              {title && <ToastTitle>{title}</ToastTitle>}
+              {description && (
+                <ToastDescription>{description}</ToastDescription>
+              )}
+            </div>
+            {action}
+            <ToastClose />
+          </Toast>
+        )
+      })}
+      <ToastViewport />
+    </ToastProvider>
+  )
+}

frontend/components/ui/toggle-group.tsx

@@ -0,0 +1,61 @@
+"use client"
+
+import * as React from "react"
+import * as ToggleGroupPrimitive from "@radix-ui/react-toggle-group"
+import { type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+import { toggleVariants } from "@/components/ui/toggle"
+
+const ToggleGroupContext = React.createContext<
+  VariantProps<typeof toggleVariants>
+>({
+  size: "default",
+  variant: "default",
+})
+
+const ToggleGroup = React.forwardRef<
+  React.ElementRef<typeof ToggleGroupPrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof ToggleGroupPrimitive.Root> &
+    VariantProps<typeof toggleVariants>
+>(({ className, variant, size, children, ...props }, ref) => (
+  <ToggleGroupPrimitive.Root
+    ref={ref}
+    className={cn("flex items-center justify-center gap-1", className)}
+    {...props}
+  >
+    <ToggleGroupContext.Provider value={{ variant, size }}>
+      {children}
+    </ToggleGroupContext.Provider>
+  </ToggleGroupPrimitive.Root>
+))
+
+ToggleGroup.displayName = ToggleGroupPrimitive.Root.displayName
+
+const ToggleGroupItem = React.forwardRef<
+  React.ElementRef<typeof ToggleGroupPrimitive.Item>,
+  React.ComponentPropsWithoutRef<typeof ToggleGroupPrimitive.Item> &
+    VariantProps<typeof toggleVariants>
+>(({ className, children, variant, size, ...props }, ref) => {
+  const context = React.useContext(ToggleGroupContext)
+
+  return (
+    <ToggleGroupPrimitive.Item
+      ref={ref}
+      className={cn(
+        toggleVariants({
+          variant: context.variant || variant,
+          size: context.size || size,
+        }),
+        className
+      )}
+      {...props}
+    >
+      {children}
+    </ToggleGroupPrimitive.Item>
+  )
+})
+
+ToggleGroupItem.displayName = ToggleGroupPrimitive.Item.displayName
+
+export { ToggleGroup, ToggleGroupItem }

frontend/components/ui/toggle.tsx

@@ -0,0 +1,45 @@
+"use client"
+
+import * as React from "react"
+import * as TogglePrimitive from "@radix-ui/react-toggle"
+import { cva, type VariantProps } from "class-variance-authority"
+
+import { cn } from "@/lib/utils"
+
+const toggleVariants = cva(
+  "inline-flex items-center justify-center rounded-md text-sm font-medium ring-offset-background transition-colors hover:bg-muted hover:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 data-[state=on]:bg-accent data-[state=on]:text-accent-foreground [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0 gap-2",
+  {
+    variants: {
+      variant: {
+        default: "bg-transparent",
+        outline:
+          "border border-input bg-transparent hover:bg-accent hover:text-accent-foreground",
+      },
+      size: {
+        default: "h-10 px-3 min-w-10",
+        sm: "h-9 px-2.5 min-w-9",
+        lg: "h-11 px-5 min-w-11",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+const Toggle = React.forwardRef<
+  React.ElementRef<typeof TogglePrimitive.Root>,
+  React.ComponentPropsWithoutRef<typeof TogglePrimitive.Root> &
+    VariantProps<typeof toggleVariants>
+>(({ className, variant, size, ...props }, ref) => (
+  <TogglePrimitive.Root
+    ref={ref}
+    className={cn(toggleVariants({ variant, size, className }))}
+    {...props}
+  />
+))
+
+Toggle.displayName = TogglePrimitive.Root.displayName
+
+export { Toggle, toggleVariants }

frontend/components/ui/tooltip.tsx

@@ -0,0 +1,30 @@
+"use client"
+
+import * as React from "react"
+import * as TooltipPrimitive from "@radix-ui/react-tooltip"
+
+import { cn } from "@/lib/utils"
+
+const TooltipProvider = TooltipPrimitive.Provider
+
+const Tooltip = TooltipPrimitive.Root
+
+const TooltipTrigger = TooltipPrimitive.Trigger
+
+const TooltipContent = React.forwardRef<
+  React.ElementRef<typeof TooltipPrimitive.Content>,
+  React.ComponentPropsWithoutRef<typeof TooltipPrimitive.Content>
+>(({ className, sideOffset = 4, ...props }, ref) => (
+  <TooltipPrimitive.Content
+    ref={ref}
+    sideOffset={sideOffset}
+    className={cn(
+      "z-50 overflow-hidden rounded-md border bg-popover px-3 py-1.5 text-sm text-popover-foreground shadow-md animate-in fade-in-0 zoom-in-95 data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=closed]:zoom-out-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2",
+      className
+    )}
+    {...props}
+  />
+))
+TooltipContent.displayName = TooltipPrimitive.Content.displayName
+
+export { Tooltip, TooltipTrigger, TooltipContent, TooltipProvider }

frontend/components/ui/use-mobile.tsx

@@ -0,0 +1,19 @@
+import * as React from "react"
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener("change", onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener("change", onChange)
+  }, [])
+
+  return !!isMobile
+}

frontend/components/ui/use-toast.ts

@@ -0,0 +1,194 @@
+"use client"
+
+// Inspired by react-hot-toast library
+import * as React from "react"
+
+import type {
+  ToastActionElement,
+  ToastProps,
+} from "@/components/ui/toast"
+
+const TOAST_LIMIT = 1
+const TOAST_REMOVE_DELAY = 1000000
+
+type ToasterToast = ToastProps & {
+  id: string
+  title?: React.ReactNode
+  description?: React.ReactNode
+  action?: ToastActionElement
+}
+
+const actionTypes = {
+  ADD_TOAST: "ADD_TOAST",
+  UPDATE_TOAST: "UPDATE_TOAST",
+  DISMISS_TOAST: "DISMISS_TOAST",
+  REMOVE_TOAST: "REMOVE_TOAST",
+} as const
+
+let count = 0
+
+function genId() {
+  count = (count + 1) % Number.MAX_SAFE_INTEGER
+  return count.toString()
+}
+
+type ActionType = typeof actionTypes
+
+type Action =
+  | {
+      type: ActionType["ADD_TOAST"]
+      toast: ToasterToast
+    }
+  | {
+      type: ActionType["UPDATE_TOAST"]
+      toast: Partial<ToasterToast>
+    }
+  | {
+      type: ActionType["DISMISS_TOAST"]
+      toastId?: ToasterToast["id"]
+    }
+  | {
+      type: ActionType["REMOVE_TOAST"]
+      toastId?: ToasterToast["id"]
+    }
+
+interface State {
+  toasts: ToasterToast[]
+}
+
+const toastTimeouts = new Map<string, ReturnType<typeof setTimeout>>()
+
+const addToRemoveQueue = (toastId: string) => {
+  if (toastTimeouts.has(toastId)) {
+    return
+  }
+
+  const timeout = setTimeout(() => {
+    toastTimeouts.delete(toastId)
+    dispatch({
+      type: "REMOVE_TOAST",
+      toastId: toastId,
+    })
+  }, TOAST_REMOVE_DELAY)
+
+  toastTimeouts.set(toastId, timeout)
+}
+
+export const reducer = (state: State, action: Action): State => {
+  switch (action.type) {
+    case "ADD_TOAST":
+      return {
+        ...state,
+        toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
+      }
+
+    case "UPDATE_TOAST":
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === action.toast.id ? { ...t, ...action.toast } : t
+        ),
+      }
+
+    case "DISMISS_TOAST": {
+      const { toastId } = action
+
+      // ! Side effects ! - This could be extracted into a dismissToast() action,
+      // but I'll keep it here for simplicity
+      if (toastId) {
+        addToRemoveQueue(toastId)
+      } else {
+        state.toasts.forEach((toast) => {
+          addToRemoveQueue(toast.id)
+        })
+      }
+
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === toastId || toastId === undefined
+            ? {
+                ...t,
+                open: false,
+              }
+            : t
+        ),
+      }
+    }
+    case "REMOVE_TOAST":
+      if (action.toastId === undefined) {
+        return {
+          ...state,
+          toasts: [],
+        }
+      }
+      return {
+        ...state,
+        toasts: state.toasts.filter((t) => t.id !== action.toastId),
+      }
+  }
+}
+
+const listeners: Array<(state: State) => void> = []
+
+let memoryState: State = { toasts: [] }
+
+function dispatch(action: Action) {
+  memoryState = reducer(memoryState, action)
+  listeners.forEach((listener) => {
+    listener(memoryState)
+  })
+}
+
+type Toast = Omit<ToasterToast, "id">
+
+function toast({ ...props }: Toast) {
+  const id = genId()
+
+  const update = (props: ToasterToast) =>
+    dispatch({
+      type: "UPDATE_TOAST",
+      toast: { ...props, id },
+    })
+  const dismiss = () => dispatch({ type: "DISMISS_TOAST", toastId: id })
+
+  dispatch({
+    type: "ADD_TOAST",
+    toast: {
+      ...props,
+      id,
+      open: true,
+      onOpenChange: (open) => {
+        if (!open) dismiss()
+      },
+    },
+  })
+
+  return {
+    id: id,
+    dismiss,
+    update,
+  }
+}
+
+function useToast() {
+  const [state, setState] = React.useState<State>(memoryState)
+
+  React.useEffect(() => {
+    listeners.push(setState)
+    return () => {
+      const index = listeners.indexOf(setState)
+      if (index > -1) {
+        listeners.splice(index, 1)
+      }
+    }
+  }, [state])
+
+  return {
+    ...state,
+    toast,
+    dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId }),
+  }
+}
+
+export { useToast, toast }

frontend/context/auth-context.tsx

@@ -0,0 +1,203 @@
+"use client"
+
+import React, { createContext, useContext, useState, useEffect, useCallback } from "react"
+import detectEthereumProvider from "@metamask/detect-provider"
+import { ethers } from "ethers"
+import { toast } from "react-hot-toast"
+import api from "@/lib/api"
+import type { AuthNonceRequest, AuthNonceResponse, AuthVerifyRequest, AuthVerifyResponse, User } from "@/lib/types"
+import { auth } from "@/lib/firebase"
+import {
+  signInWithEmailAndPassword,
+  createUserWithEmailAndPassword,
+  signOut,
+  onAuthStateChanged,
+  type User as FirebaseUser,
+} from "firebase/auth"
+
+interface AuthContextType {
+  user: User | null // MetaMask user
+  firebaseUser: FirebaseUser | null // Firebase user
+  token: string | null // JWT token from backend (only for MetaMask users)
+  isLoadingAuth: boolean
+  authMethod: "metamask" | "firebase" | null
+  connectWallet: () => Promise<void>
+  loginWithEmail: (email: string, password: string) => Promise<void>
+  signupWithEmail: (email: string, password: string) => Promise<void>
+  logout: () => void
+}
+
+const AuthContext = createContext<AuthContextType | undefined>(undefined)
+
+export function AuthProvider({ children }: { children: React.ReactNode }) {
+  const [user, setUser] = useState<User | null>(null) // For MetaMask user
+  const [firebaseUser, setFirebaseUser] = useState<FirebaseUser | null>(null) // For Firebase user
+  const [token, setToken] = useState<string | null>(null) // JWT token
+  const [isLoadingAuth, setIsLoadingAuth] = useState(true)
+  const [authMethod, setAuthMethod] = useState<"metamask" | "firebase" | null>(null)
+
+  useEffect(() => {
+    // Check for MetaMask token
+    const storedToken = localStorage.getItem("openlearnx_jwt_token")
+    const storedUser = localStorage.getItem("openlearnx_user")
+    if (storedToken && storedUser) {
+      try {
+        setUser(JSON.parse(storedUser))
+        setToken(storedToken)
+        setAuthMethod("metamask")
+      } catch (error) {
+        console.error("Failed to parse stored MetaMask user or token:", error)
+        localStorage.removeItem("openlearnx_jwt_token")
+        localStorage.removeItem("openlearnx_user")
+      }
+    }
+
+    // Listen for Firebase auth state changes
+    const unsubscribe = onAuthStateChanged(auth, (currentUser) => {
+      if (currentUser) {
+        setFirebaseUser(currentUser)
+        setAuthMethod("firebase")
+      } else {
+        setFirebaseUser(null)
+        if (authMethod !== "metamask") {
+          // Only clear if not already MetaMask authenticated
+          setAuthMethod(null)
+        }
+      }
+      setIsLoadingAuth(false)
+    })
+
+    return () => unsubscribe()
+  }, [authMethod])
+
+  const logout = useCallback(async () => {
+    setUser(null)
+    setFirebaseUser(null)
+    setToken(null)
+    setAuthMethod(null)
+    localStorage.removeItem("openlearnx_jwt_token")
+    localStorage.removeItem("openlearnx_user")
+    try {
+      await signOut(auth) // Sign out from Firebase
+    } catch (error) {
+      console.error("Error signing out from Firebase:", error)
+    }
+    toast.success("Logged out successfully!")
+  }, [])
+
+  const connectWallet = useCallback(async () => {
+    setIsLoadingAuth(true)
+    try {
+      const provider = await detectEthereumProvider()
+
+      if (!provider) {
+        toast.error("MetaMask not detected. Please install it.")
+        return
+      }
+
+      const ethProvider = new ethers.BrowserProvider(provider as any)
+      const accounts = await ethProvider.send("eth_requestAccounts", [])
+
+      if (accounts.length === 0) {
+        toast.error("No accounts connected.")
+        return
+      }
+
+      const walletAddress = accounts[0]
+
+      // 1. Request Nonce
+      const nonceResponse = await api.post<AuthNonceResponse>("/api/auth/nonce", {
+        wallet_address: walletAddress,
+      } as AuthNonceRequest)
+      const { nonce, message } = nonceResponse.data
+
+      // 2. Sign Message
+      const signer = await ethProvider.getSigner()
+      const signature = await signer.signMessage(message)
+
+      // 3. Verify Signature
+      const verifyResponse = await api.post<AuthVerifyResponse>("/api/auth/verify", {
+        wallet_address: walletAddress,
+        signature,
+        message,
+      } as AuthVerifyRequest)
+
+      if (verifyResponse.data.success) {
+        const { token: newToken, user: newUser } = verifyResponse.data
+        setToken(newToken)
+        setUser(newUser)
+        setFirebaseUser(null) // Clear Firebase user if MetaMask logs in
+        setAuthMethod("metamask")
+        localStorage.setItem("openlearnx_jwt_token", newToken)
+        localStorage.setItem("openlearnx_user", JSON.stringify(newUser))
+        toast.success(`Welcome, ${newUser.wallet_address.slice(0, 6)}...${newUser.wallet_address.slice(-4)}!`)
+      } else {
+        toast.error("MetaMask authentication failed. Please try again.")
+        logout()
+      }
+    } catch (error: any) {
+      console.error("MetaMask authentication error:", error)
+      toast.error(error.message || "Failed to connect wallet or authenticate.")
+      logout()
+    } finally {
+      setIsLoadingAuth(false)
+    }
+  }, [logout])
+
+  const loginWithEmail = useCallback(async (email: string, password: string) => {
+    setIsLoadingAuth(true)
+    try {
+      await signInWithEmailAndPassword(auth, email, password)
+      // Firebase user is set by onAuthStateChanged listener
+      setUser(null) // Clear MetaMask user if Firebase logs in
+      setToken(null) // Clear JWT token
+      toast.success("Logged in with email!")
+    } catch (error: any) {
+      console.error("Firebase login error:", error)
+      toast.error(error.message || "Failed to login with email.")
+    } finally {
+      setIsLoadingAuth(false)
+    }
+  }, [])
+
+  const signupWithEmail = useCallback(async (email: string, password: string) => {
+    setIsLoadingAuth(true)
+    try {
+      await createUserWithEmailAndPassword(auth, email, password)
+      // Firebase user is set by onAuthStateChanged listener
+      setUser(null) // Clear MetaMask user if Firebase logs in
+      setToken(null) // Clear JWT token
+      toast.success("Signed up and logged in with email!")
+    } catch (error: any) {
+      console.error("Firebase signup error:", error)
+      toast.error(error.message || "Failed to sign up with email.")
+    } finally {
+      setIsLoadingAuth(false)
+    }
+  }, [])
+
+  const contextValue = React.useMemo(
+    () => ({
+      user,
+      firebaseUser,
+      token,
+      isLoadingAuth,
+      authMethod,
+      connectWallet,
+      loginWithEmail,
+      signupWithEmail,
+      logout,
+    }),
+    [user, firebaseUser, token, isLoadingAuth, authMethod, connectWallet, loginWithEmail, signupWithEmail, logout],
+  )
+
+  return <AuthContext.Provider value={contextValue}>{children}</AuthContext.Provider>
+}
+
+export function useAuth() {
+  const context = useContext(AuthContext)
+  if (context === undefined) {
+    throw new Error("useAuth must be used within an AuthProvider")
+  }
+  return context
+}

frontend/hooks/use-mobile.tsx

@@ -0,0 +1,19 @@
+import * as React from "react"
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener("change", onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener("change", onChange)
+  }, [])
+
+  return !!isMobile
+}

frontend/hooks/use-toast.ts

@@ -0,0 +1,194 @@
+"use client"
+
+// Inspired by react-hot-toast library
+import * as React from "react"
+
+import type {
+  ToastActionElement,
+  ToastProps,
+} from "@/components/ui/toast"
+
+const TOAST_LIMIT = 1
+const TOAST_REMOVE_DELAY = 1000000
+
+type ToasterToast = ToastProps & {
+  id: string
+  title?: React.ReactNode
+  description?: React.ReactNode
+  action?: ToastActionElement
+}
+
+const actionTypes = {
+  ADD_TOAST: "ADD_TOAST",
+  UPDATE_TOAST: "UPDATE_TOAST",
+  DISMISS_TOAST: "DISMISS_TOAST",
+  REMOVE_TOAST: "REMOVE_TOAST",
+} as const
+
+let count = 0
+
+function genId() {
+  count = (count + 1) % Number.MAX_SAFE_INTEGER
+  return count.toString()
+}
+
+type ActionType = typeof actionTypes
+
+type Action =
+  | {
+      type: ActionType["ADD_TOAST"]
+      toast: ToasterToast
+    }
+  | {
+      type: ActionType["UPDATE_TOAST"]
+      toast: Partial<ToasterToast>
+    }
+  | {
+      type: ActionType["DISMISS_TOAST"]
+      toastId?: ToasterToast["id"]
+    }
+  | {
+      type: ActionType["REMOVE_TOAST"]
+      toastId?: ToasterToast["id"]
+    }
+
+interface State {
+  toasts: ToasterToast[]
+}
+
+const toastTimeouts = new Map<string, ReturnType<typeof setTimeout>>()
+
+const addToRemoveQueue = (toastId: string) => {
+  if (toastTimeouts.has(toastId)) {
+    return
+  }
+
+  const timeout = setTimeout(() => {
+    toastTimeouts.delete(toastId)
+    dispatch({
+      type: "REMOVE_TOAST",
+      toastId: toastId,
+    })
+  }, TOAST_REMOVE_DELAY)
+
+  toastTimeouts.set(toastId, timeout)
+}
+
+export const reducer = (state: State, action: Action): State => {
+  switch (action.type) {
+    case "ADD_TOAST":
+      return {
+        ...state,
+        toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
+      }
+
+    case "UPDATE_TOAST":
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === action.toast.id ? { ...t, ...action.toast } : t
+        ),
+      }
+
+    case "DISMISS_TOAST": {
+      const { toastId } = action
+
+      // ! Side effects ! - This could be extracted into a dismissToast() action,
+      // but I'll keep it here for simplicity
+      if (toastId) {
+        addToRemoveQueue(toastId)
+      } else {
+        state.toasts.forEach((toast) => {
+          addToRemoveQueue(toast.id)
+        })
+      }
+
+      return {
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === toastId || toastId === undefined
+            ? {
+                ...t,
+                open: false,
+              }
+            : t
+        ),
+      }
+    }
+    case "REMOVE_TOAST":
+      if (action.toastId === undefined) {
+        return {
+          ...state,
+          toasts: [],
+        }
+      }
+      return {
+        ...state,
+        toasts: state.toasts.filter((t) => t.id !== action.toastId),
+      }
+  }
+}
+
+const listeners: Array<(state: State) => void> = []
+
+let memoryState: State = { toasts: [] }
+
+function dispatch(action: Action) {
+  memoryState = reducer(memoryState, action)
+  listeners.forEach((listener) => {
+    listener(memoryState)
+  })
+}
+
+type Toast = Omit<ToasterToast, "id">
+
+function toast({ ...props }: Toast) {
+  const id = genId()
+
+  const update = (props: ToasterToast) =>
+    dispatch({
+      type: "UPDATE_TOAST",
+      toast: { ...props, id },
+    })
+  const dismiss = () => dispatch({ type: "DISMISS_TOAST", toastId: id })
+
+  dispatch({
+    type: "ADD_TOAST",
+    toast: {
+      ...props,
+      id,
+      open: true,
+      onOpenChange: (open) => {
+        if (!open) dismiss()
+      },
+    },
+  })
+
+  return {
+    id: id,
+    dismiss,
+    update,
+  }
+}
+
+function useToast() {
+  const [state, setState] = React.useState<State>(memoryState)
+
+  React.useEffect(() => {
+    listeners.push(setState)
+    return () => {
+      const index = listeners.indexOf(setState)
+      if (index > -1) {
+        listeners.splice(index, 1)
+      }
+    }
+  }, [state])
+
+  return {
+    ...state,
+    toast,
+    dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId }),
+  }
+}
+
+export { useToast, toast }

frontend/lib/api.ts

@@ -0,0 +1,25 @@
+import axios from "axios"
+
+const API_BASE_URL = process.env.NEXT_PUBLIC_BACKEND_URL || "http://127.0.0.1:5000"
+
+const api = axios.create({
+  baseURL: API_BASE_URL,
+  headers: {
+    "Content-Type": "application/json",
+  },
+})
+
+api.interceptors.request.use(
+  (config) => {
+    const token = localStorage.getItem("openlearnx_jwt_token")
+    if (token) {
+      config.headers.Authorization = `Bearer ${token}`
+    }
+    return config
+  },
+  (error) => {
+    return Promise.reject(error)
+  },
+)
+
+export default api

frontend/lib/firebase.ts

@@ -0,0 +1,21 @@
+// lib/firebase.ts
+import { initializeApp, getApps, getApp } from "firebase/app"
+import { getAuth } from "firebase/auth"
+// import { getAnalytics } from "firebase/analytics"; // Analytics can be initialized if needed
+
+const firebaseConfig = {
+  apiKey: "AIzaSyB0srpcLeNF8nR6DF_fP7_FsemKY4--4wU",
+  authDomain: "nexulen-f8790.firebaseapp.com",
+  projectId: "nexulen-f8790",
+  storageBucket: "nexulen-f8790.firebasestorage.app",
+  messagingSenderId: "718749886008",
+  appId: "1:718749886008:web:df0563c31aaff0c2e628cd",
+  measurementId: "G-D7B9CCNQ2G",
+}
+
+// Initialize Firebase
+const app = !getApps().length ? initializeApp(firebaseConfig) : getApp()
+const auth = getAuth(app)
+// const analytics = getAnalytics(app); // Uncomment if you need analytics
+
+export { app, auth }

frontend/lib/types.ts

@@ -0,0 +1,150 @@
+export interface AuthNonceRequest {
+  wallet_address: string
+}
+
+export interface AuthNonceResponse {
+  nonce: string
+  message: string
+}
+
+export interface AuthVerifyRequest {
+  wallet_address: string
+  signature: string
+  message: string
+}
+
+export interface AuthVerifyResponse {
+  success: boolean
+  token: string
+  user: {
+    wallet_address: string
+    // Add other user details if available from your backend
+  }
+}
+
+export interface QuestionOption {
+  id: string
+  text: string
+}
+
+export interface Question {
+  id: string
+  text: string
+  options: QuestionOption[]
+  type: string // e.g., "multiple_choice"
+}
+
+export interface TestStartRequest {
+  subject: string
+}
+
+export interface TestStartResponse {
+  session_id: string
+  question: Question
+  question_number: number
+  total_questions: number
+}
+
+export interface Feedback {
+  correct: boolean
+  confidence_score: number
+  explanation: string
+  correct_answer?: string // Optional, if backend provides it
+}
+
+export interface TestAnswerRequest {
+  session_id: string
+  question_id: string
+  answer: number // Index of the selected option
+}
+
+export interface TestAnswerResponse {
+  feedback: Feedback
+  next_question: Question | null
+  test_completed: boolean
+}
+
+export interface User {
+  wallet_address: string
+  // Add other user details
+}
+
+// New types for Course Platform
+export interface Lesson {
+  id: string
+  title: string
+  type: "video" | "text" | "code" | "quiz"
+  content: string // URL for video, markdown for text, code snippet for code
+  completed: boolean
+}
+
+export interface Module {
+  id: string
+  title: string
+  lessons: Lesson[]
+}
+
+export interface Course {
+  id: string
+  title: string
+  subject: string
+  description: string
+  progress: number // 0-100
+  modules: Module[]
+}
+
+// New types for Coding Platform
+export interface CodingProblem {
+  id: string
+  title: string
+  category: string
+  difficulty: "Easy" | "Medium" | "Hard"
+  description: string
+  initial_code: { [key: string]: string } // e.g., { "python": "def solve():\n  pass" }
+  test_cases: { input: string; expected_output: string }[]
+  solved: boolean
+}
+
+export interface CodeExecutionResult {
+  output: string
+  error: string | null
+  runtime: number
+  correct: boolean
+}
+
+// New types for Quiz Platform (reusing existing Test types)
+export interface Quiz {
+  id: string
+  title: string
+  topic: string
+  difficulty: "Easy" | "Medium" | "Hard"
+  recent_performance?: number // 0-100
+}
+
+export interface QuizResult {
+  score: number
+  total_questions: number
+  correct_answers: number
+  per_question_breakdown: {
+    question_id: string
+    correct: boolean
+    explanation: string
+    user_answer: string
+    correct_answer: string
+  }[]
+}
+
+// New types for Dashboard
+export interface DashboardStats {
+  total_xp: number
+  courses_in_progress: number
+  courses_completed: number
+  coding_problems_solved: number
+  quiz_accuracy: number // overall average
+  coding_streak: number
+}
+
+export interface ActivityData {
+  date: string // YYYY-MM-DD
+  count: number // Number of activities
+}

frontend/lib/utils.ts

@@ -0,0 +1,6 @@
+import { clsx, type ClassValue } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}

frontend/next.config.mjs

@@ -0,0 +1,14 @@
+/** @type {import('next').NextConfig} */
+const nextConfig = {
+  eslint: {
+    ignoreDuringBuilds: true,
+  },
+  typescript: {
+    ignoreBuildErrors: true,
+  },
+  images: {
+    unoptimized: true,
+  },
+}
+
+export default nextConfig