FINAL: WebSocket + DMs + Files - Backend Complete!

WebSocket Real-Time:
- Socket.IO server integrated
- Real-time message delivery
- User online/offline status
- Typing indicators
- Channel room management
- Auto-join on channel access

Direct Messages:
- 1-on-1 chat API
- DM history and conversations
- @grimlock in DMs (AI responds)
- Read receipts
- Unread count tracking
- WebSocket notifications

File Management:
- Upload files to channels
- Download with streaming
- File metadata tracking
- File listing by channel
- Delete with permissions

Integration:
- Messages broadcast via WebSocket
- DM notifications via WebSocket
- All APIs updated for real-time

BACKEND IS FEATURE COMPLETE!
- Auth ✅
- Channels ✅
- Messages ✅
- DMs ✅
- Files ✅
- WebSocket ✅
- @grimlock AI ✅

Ready for frontend development in next session!

backend/main.py

@@ -9,15 +9,19 @@ from contextlib import asynccontextmanager
 import logging
 from dotenv import load_dotenv
 import os
+import socketio
 
 from api.chat import router as chat_router
 from api.auth import router as auth_router
 from api.channels import router as channels_router
 from api.messages import router as messages_router
+from api.direct_messages import router as dm_router
+from api.files import router as files_router
 from core.context_manager import ContextManager
 from core.ai_client import AIClient
 from core.database import engine
 from core.models import Base
+from core.websocket import sio, broadcast_new_message
 
 # Load environment variables
 load_dotenv()
@@ -59,6 +63,8 @@ async def lifespan(app: FastAPI):
     ai_client = AIClient(api_key=api_key)
     logger.info("AI client initialized")
     
+    logger.info("WebSocket server ready")
+    
     yield
     
     # Cleanup
@@ -68,10 +74,13 @@ async def lifespan(app: FastAPI):
 app = FastAPI(
     title="Grimlock",
     description="AI-Native Company Operating System",
-    version="0.2.0",
+    version="0.3.0",
     lifespan=lifespan
 )
 
+# Mount Socket.IO
+socket_app = socketio.ASGIApp(sio, app)
+
 # CORS middleware
 app.add_middleware(
     CORSMiddleware,
@@ -85,6 +94,8 @@ app.add_middleware(
 app.include_router(auth_router, prefix="/api/auth", tags=["auth"])
 app.include_router(channels_router, prefix="/api/channels", tags=["channels"])
 app.include_router(messages_router, prefix="/api/channels", tags=["messages"])
+app.include_router(dm_router, prefix="/api/dms", tags=["direct-messages"])
+app.include_router(files_router, prefix="/api/files", tags=["files"])
 app.include_router(chat_router, prefix="/api/chat", tags=["chat"])
 
 @app.get("/")
@@ -93,8 +104,8 @@ async def root():
     return {
         "status": "online",
         "service": "Grimlock",
-        "version": "0.2.0",
-        "features": ["auth", "channels", "messages", "ai"]
+        "version": "0.3.0",
+        "features": ["auth", "channels", "messages", "dms", "files", "websocket", "ai"]
     }
 
 @app.get("/api/health")
@@ -104,7 +115,8 @@ async def health():
         "status": "healthy",
         "context_loaded": context_manager is not None and context_manager.is_loaded(),
         "ai_client_ready": ai_client is not None,
-        "database": "connected"
+        "database": "connected",
+        "websocket": "ready"
     }
 
 def get_context_manager() -> ContextManager: