Fix persisted runtime camera toggles (#23734)

* preserve runtime camera toggles across config saves

Runtime toggles (camera on/off, detect, recordings, snapshots, audio) mutate the in-memory config and persist an override to .runtime_state.json. /api/config/set re-parses yaml into a fresh FrigateConfig and swaps it in, re-applying the yaml and profile layers but dropping the runtime layer, so a camera turned off from the dashboard came back on when an unrelated camera was saved. The workers were never notified, so it only appeared to come back: the UI streamed go2rtc while ffmpeg stayed stopped.

Extract the startup replay into Dispatcher.apply_runtime_state() and call it from config_set after the swap, re-layering the overrides and republishing them so workers and the UI reconverge.

Remove the broad clear_runtime_state() from ProfileManager.update_config, which is only ever reached from config_set: with a profile active, every save wiped every camera's overrides from disk. The broad wipe stays in activate_profile, where a real profile switch does invalidate the steady state. Saves still clear the keys they rewrote via clear_runtime_state_for_yaml_keys, so yaml wins where the two disagree.

* sync runtime config on camera delete and prune its overrides

Deleting a camera re-parsed yaml into a fresh FrigateConfig but only rebound app.frigate_config and genai_manager, never dispatcher.config (nor profile_manager, stats_emitter, or the runtime overrides). The API and the dispatcher then drifted onto different config objects until the next config save re-synced them, so the API reported surviving cameras with their yaml enabled state while the dispatcher still acted on their real runtime state.

Extract the config swap that config_set already does into a shared swap_runtime_config helper and call it from both sites, so every collaborator is rebound and the surviving cameras' runtime toggles are re-layered. Also drop the deleted camera's persisted overrides via a new clear_camera so a camera later added under the same name does not inherit them.

frigate/test/test_dispatcher_runtime_state.py

@@ -126,6 +126,40 @@ class TestRestoreRuntimeState(unittest.TestCase):
         self.dispatcher.restore_runtime_state()
         self.handler_mocks["detect"].assert_called_once_with("front_door", "ON")
 
+    def test_apply_runtime_state_replays_through_handlers(self) -> None:
+        """The extracted method replays every stored entry."""
+        with patch.object(
+            self.dispatcher._runtime_state,
+            "load",
+            return_value={"front_door": {"enabled": False, "detect": True}},
+        ):
+            self.dispatcher.apply_runtime_state()
+
+        self.handler_mocks["enabled"].assert_called_once_with("front_door", "OFF")
+        self.handler_mocks["detect"].assert_called_once_with("front_door", "ON")
+
+    def test_apply_runtime_state_returns_applied_entries(self) -> None:
+        """Callers get back what was replayed, for logging and assertions."""
+        with patch.object(
+            self.dispatcher._runtime_state,
+            "load",
+            return_value={"front_door": {"enabled": False}, "nope": {"enabled": True}},
+        ):
+            applied = self.dispatcher.apply_runtime_state()
+
+        self.assertEqual(applied, {"front_door": {"enabled": False}})
+
+    def test_restore_runtime_state_still_replays(self) -> None:
+        """The startup entry point keeps working after the extraction."""
+        with patch.object(
+            self.dispatcher._runtime_state,
+            "load",
+            return_value={"back_yard": {"snapshots": False}},
+        ):
+            self.dispatcher.restore_runtime_state()
+
+        self.handler_mocks["snapshots"].assert_called_once_with("back_yard", "OFF")
+
 
 class TestHandlersPersistViaSet(unittest.TestCase):
     """Verify each in-scope handler writes to the runtime state on success."""
@@ -212,6 +246,12 @@ class TestClearPassthrough(unittest.TestCase):
         dispatcher.clear_runtime_state()
         dispatcher._runtime_state.clear_all.assert_called_once_with()
 
+    def test_clear_runtime_state_for_camera_passthrough(self) -> None:
+        dispatcher = _build_dispatcher({})
+        dispatcher._runtime_state = MagicMock(spec=RuntimeStatePersistence)
+        dispatcher.clear_runtime_state_for_camera("front_door")
+        dispatcher._runtime_state.clear_camera.assert_called_once_with("front_door")
+
 
 if __name__ == "__main__":
     unittest.main()