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/api/messages.py

@@ -14,7 +14,11 @@ from core.models import Message, Channel, User, ChannelType
 from core.ai_client import AIClient
 from core.context_manager import ContextManager
 from api.auth import get_current_user
+from core.websocket import broadcast_new_message
 import main
+import logging
+
+logger = logging.getLogger(__name__)
 
 router = APIRouter()
 
@@ -178,6 +182,25 @@ async def send_message(
     db.commit()
     db.refresh(message)
     
+    # Broadcast via WebSocket
+    message_data = {
+        "id": message.id,
+        "content": message.content,
+        "is_ai_message": message.is_ai_message,
+        "user": {
+            "id": current_user.id,
+            "name": current_user.name,
+            "email": current_user.email,
+            "role": current_user.role.value,
+            "is_online": current_user.is_online
+        } if message.user else None,
+        "reply_to_message_id": message.reply_to_message_id,
+        "created_at": message.created_at.isoformat(),
+        "edited_at": message.edited_at.isoformat() if message.edited_at else None
+    }
+    
+    await broadcast_new_message(channel_id, message_data)
+    
     # Check for @grimlock mention
     if detect_grimlock_mention(message_data.content):
         # Handle in background to not block response