Fix .gitignore: stop tracking ignored files

frontend/.gitignore

@@ -1,27 +1,22 @@
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
-
-# dependencies
+# Node.js modules and Next.js build output
 node_modules/
+.next/
+out/
+.pnpm-debug.log
 
-# next.js
-/.next/
-/out/
+# Logs and cache
+*.log
+.cache/
+*.gz
 
-# production
-/build
+# OS and Editor files
+.DS_Store
+.vscode/
+.idea/
 
-# debug
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-.pnpm-debug.log*
-
-# env files
-.env*
-
-# vercel
-.vercel
-
-# typescript
+# TypeScript
 *.tsbuildinfo
-next-env.d.tsnode_modules/
+
+# Compiled binaries (can be huge)
+*.so
+*.node