Update docs and screenshots

backend/app/websocket/router.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+import asyncio
+
+from fastapi import APIRouter, WebSocket, WebSocketDisconnect
+
+from app.core.dependencies import app_state
+
+websocket_router = APIRouter()
+
+
+@websocket_router.websocket("/ws/live")
+async def live_socket(websocket: WebSocket) -> None:
+    await websocket.accept()
+    try:
+        while True:
+            await websocket.send_json(
+                {
+                    "engine": app_state.engine.snapshot(),
+                    "telemetry": app_state.telemetry.snapshot(len(app_state.triggers.queue)),
+                    "bpm": app_state.bpm.snapshot(),
+                    "queue": app_state.triggers.snapshot(),
+                }
+            )
+            await asyncio.sleep(0.1)
+    except WebSocketDisconnect:
+        return