feat: Initial commit - Task Reporter incident response system

Complete implementation of the production line incident response system (生產線異常即時反應系統) including:

Backend (FastAPI):
- User authentication with AD integration and session management
- Chat room management (create, list, update, members, roles)
- Real-time messaging via WebSocket (typing indicators, reactions)
- File storage with MinIO (upload, download, image preview)

Frontend (React + Vite):
- Authentication flow with token management
- Room list with filtering, search, and pagination
- Real-time chat interface with WebSocket
- File upload with drag-and-drop and image preview
- Member management and room settings
- Breadcrumb navigation
- 53 unit tests (Vitest)

Specifications:
- authentication: AD auth, sessions, JWT tokens
- chat-room: rooms, members, templates
- realtime-messaging: WebSocket, messages, reactions
- file-storage: MinIO integration, file management
- frontend-core: React SPA structure

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

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

app/modules/auth/dependencies.py

@@ -0,0 +1,31 @@
+"""FastAPI dependencies for authentication
+
+供其他模組引用的 dependency injection 函數
+"""
+from fastapi import Request, HTTPException, status
+
+
+async def get_current_user(request: Request) -> dict:
+    """Get current authenticated user from request state
+
+    Usage in other modules:
+        from app.modules.auth import get_current_user
+
+        @router.get("/my-endpoint")
+        async def my_endpoint(current_user: dict = Depends(get_current_user)):
+            username = current_user["username"]
+            display_name = current_user["display_name"]
+            ...
+
+    Returns:
+        dict: {"id": int, "username": str, "display_name": str}
+
+    Raises:
+        HTTPException: If user not authenticated (middleware should prevent this)
+    """
+    if not hasattr(request.state, "user"):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED, detail="Authentication required"
+        )
+
+    return request.state.user