feat: Initial commit for OnEver Drive centralized backup system with Windows PyQt6 agent and Proxmox LXC deployment

backend/app/ws/manager.py

@@ -0,0 +1,36 @@
+import json
+from typing import List, Dict, Any
+from fastapi import WebSocket
+
+class WebSocketManager:
+    """Manages active WebSocket connections for live telemetry and dashboard updates."""
+
+    def __init__(self):
+        self.active_connections: List[WebSocket] = []
+
+    async def connect(self, websocket: WebSocket):
+        await websocket.accept()
+        self.active_connections.append(websocket)
+
+    def disconnect(self, websocket: WebSocket):
+        if websocket in self.active_connections:
+            self.active_connections.remove(websocket)
+
+    async def broadcast(self, message_type: str, data: Dict[str, Any]):
+        """Broadcasts a structured JSON event to all connected dashboard clients."""
+        payload = {
+            "type": message_type,
+            "data": data
+        }
+        message_str = json.dumps(payload, default=str)
+        dead_connections = []
+        for connection in self.active_connections:
+            try:
+                await connection.send_text(message_str)
+            except Exception:
+                dead_connections.append(connection)
+
+        for dead in dead_connections:
+            self.disconnect(dead)
+
+ws_manager = WebSocketManager()