HA integration: fix reload loop, parallel device fetch, WS guards, translations

- Fix indentation bug causing scenes device to not register
- Use nonlocal tracking to prevent infinite reload loops on target/scene changes
- Guard WS start/stop to avoid redundant connections
- Parallel device brightness fetching via asyncio.gather
- Route set_leds service to correct coordinator by source ID
- Remove stale pattern cache, reuse single timeout object
- Fix translations structure for light/select entities
- Unregister service when last config entry unloaded

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

custom_components/wled_screen_controller/select.py

@@ -96,7 +96,7 @@ class CSSSourceSelect(CoordinatorEntity, SelectEntity):
         return self._target_id in self.coordinator.data.get("targets", {})
 
     async def async_select_option(self, option: str) -> None:
-        source_id = self._name_to_id(option)
+        source_id = self._name_to_id_map().get(option)
         if source_id is None:
             _LOGGER.error("CSS source not found: %s", option)
             return
@@ -104,12 +104,9 @@ class CSSSourceSelect(CoordinatorEntity, SelectEntity):
             self._target_id, color_strip_source_id=source_id
         )
 
-    def _name_to_id(self, name: str) -> str | None:
+    def _name_to_id_map(self) -> dict[str, str]:
         sources = (self.coordinator.data or {}).get("css_sources") or []
-        for s in sources:
-            if s["name"] == name:
-                return s["id"]
-        return None
+        return {s["name"]: s["id"] for s in sources}
 
 
 class BrightnessSourceSelect(CoordinatorEntity, SelectEntity):
@@ -167,17 +164,14 @@ class BrightnessSourceSelect(CoordinatorEntity, SelectEntity):
         if option == NONE_OPTION:
             source_id = ""
         else:
-            source_id = self._name_to_id(option)
+            name_map = {
+                s["name"]: s["id"]
+                for s in (self.coordinator.data or {}).get("value_sources") or []
+            }
+            source_id = name_map.get(option)
             if source_id is None:
                 _LOGGER.error("Value source not found: %s", option)
                 return
         await self.coordinator.update_target(
             self._target_id, brightness_value_source_id=source_id
         )
-
-    def _name_to_id(self, name: str) -> str | None:
-        sources = (self.coordinator.data or {}).get("value_sources") or []
-        for s in sources:
-            if s["name"] == name:
-                return s["id"]
-        return None