Adding the new rewrite

app/routes/sse.py

@@ -0,0 +1,41 @@
+"""Server-Sent Events stream with snapshots + fleet overview."""
+import asyncio
+
+import orjson
+from fastapi import APIRouter, Depends
+from fastapi.responses import StreamingResponse
+
+from ..auth import require_session
+from ..config import load_config
+from ..config_manager import get_config_version
+from ..storage import get_latest, get_redis
+
+router = APIRouter()
+
+
+@router.get("/api/stream")
+async def stream(user=Depends(require_session)):
+    async def event_gen():
+        while True:
+            cfg = load_config()
+            r = get_redis()
+            payload = {"snapshots": {}, "cfgVersion": get_config_version()}
+            for u in cfg.ups:
+                snap = await get_latest(u.name)
+                if snap:
+                    payload["snapshots"][u.name] = snap
+            payload["upsMeta"] = [
+                {
+                    "name": u.name,
+                    "host": u.host,
+                    "port": u.port,
+                    "offline": bool(r.get(f"ups:health:offline:{u.name}")),
+                }
+                for u in cfg.ups
+            ]
+            for name, snap in payload["snapshots"].items():
+                payload.setdefault(name, snap)
+            yield f"data: {orjson.dumps(payload).decode()}\n\n"
+            await asyncio.sleep(5)
+
+    return StreamingResponse(event_gen(), media_type="text/event-stream")