Merge main branch into react-migration

- Resolve merge conflict in Navigation.tsx
- Keep user search functionality removed (react-migration version)
- Maintain mobile responsive design improvements
- Ready for merge back to main

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.local.json

@@ -1,27 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(git commit:*)",
-      "Bash(git checkout:*)",
-      "Bash(mkdir:*)",
-      "Bash(npm install)",
-      "Bash(nvm use:*)",
-      "Bash(npm run dev:*)",
-      "Bash(npm run build:*)",
-      "Bash(npm run preview:*)",
-      "Bash(pkill:*)",
-      "Bash(npx serve:*)",
-      "Bash(python3:*)",
-      "Bash(git add:*)",
-      "Bash(open:*)",
-      "WebFetch(domain:api.syui.ai)",
-      "Bash(git push:*)",
-      "Bash(find:*)",
-      "Bash(rm:*)",
-      "Bash(grep:*)",
-      "Bash(ls:*)",
-      "Bash(cp:*)"
-    ],
-    "deny": []
-  }
-}