feat: unify card runtime and event-driven web ui

routes/rtc.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import JSONResponse
+
+from app_dependencies import get_runtime
+from route_helpers import read_json_request
+from web_runtime import WebAppRuntime
+
+router = APIRouter()
+
+
+@router.post("/rtc/offer")
+async def rtc_offer(
+    request: Request,
+    runtime: WebAppRuntime = Depends(get_runtime),
+) -> JSONResponse:
+    try:
+        payload = await read_json_request(request)
+    except ValueError as exc:
+        return JSONResponse({"error": str(exc)}, status_code=400)
+
+    answer = await runtime.rtc_manager.handle_offer(payload)
+    if answer is None:
+        return JSONResponse(
+            {"error": "WebRTC backend unavailable on host (aiortc is not installed)."},
+            status_code=503,
+        )
+    return JSONResponse(answer)