Replace the /sse/subscribe endpoint with a /ws WebSocket endpoint backed
by ws_mgr, and port the warmup helper (_send_sse_event -> _send_ws_event,
SSE -> Event, broadcast_sse_msg -> broadcast_msg). Also fixes two tests
left over from the prior SSE->Event/broadcast_msg rename that still
referenced the old names and were failing collection/execution.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The WebUI only listens for the app_state_update_message SSE event to
populate the Apps tab. In bitcoin-only mode the warmup data was sent
under installed_app_status, which no client listens to, so the Apps
tab was stuck on the loading screen whenever the app status cache was
warm. Installing LND made it work again because the lightning warmup
path already used the correct event (raspiblitz#3608, raspiblitz#5141).
Also hardens the warmup path:
- reset the warmup_running flag on errors so a single failure no
longer starves all future SSE clients of warmup data
- convert per-source exceptions in the bitcoin-only warmup gather
instead of discarding the whole data set
- don't fall through to the partial-data branches when the API is
fully initialized with lightning disabled
- remove the now-unused INSTALLED_APP_STATUS event and the dead
cached_status_raw variable
Adds regression tests plus a conftest.py providing test env defaults
so the suite runs without a developer .env file.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
