Frontend: Complete Next.js implementation

Core Features:
- ✅ Authentication (login/register pages)
- ✅ Main layout with sidebar
- ✅ Channel list and navigation
- ✅ Channel page with real-time messaging
- ✅ Direct messages (DMs) page
- ✅ Message components (list, input)
- ✅ WebSocket integration for real-time updates
- ✅ Typing indicators
- ✅ Online status indicators
- ✅ Stores (auth, channels, messages)
- ✅ API client with JWT auth
- ✅ Socket.IO client wrapper
- ✅ Responsive UI with Tailwind

Tech Stack:
- Next.js 14 (App Router)
- TypeScript
- TailwindCSS
- Socket.IO client
- Zustand (state management)
- Axios (HTTP client)
- date-fns (date formatting)
- lucide-react (icons)

Build Status: ✅ Successfully compiles
Production Ready: ✅ Optimized build generated

frontend/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "grimlock-frontend",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "dev": "next dev",
+    "build": "next build",
+    "start": "next start",
+    "lint": "next lint"
+  },
+  "dependencies": {
+    "next": "14.2.18",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "socket.io-client": "^4.8.1",
+    "axios": "^1.7.9",
+    "@tanstack/react-query": "^5.62.8",
+    "zustand": "^5.0.2",
+    "lucide-react": "^0.468.0",
+    "date-fns": "^4.1.0"
+  },
+  "devDependencies": {
+    "typescript": "^5",
+    "@types/node": "^20",
+    "@types/react": "^18",
+    "@types/react-dom": "^18",
+    "postcss": "^8",
+    "tailwindcss": "^3.4.1",
+    "eslint": "^8",
+    "eslint-config-next": "14.2.18",
+    "autoprefixer": "^10.4.20"
+  }
+}