Add EntitySelect/IconSelect UI improvements across modals

- Portal IconSelect popups to document.body with position:fixed to prevent
  clipping by modal overflow-y:auto
- Replace custom scene selectors in automation editor with EntitySelect
  command-palette pickers (main scene + fallback scene)
- Add IconSelect grid for automation deactivation mode (none/revert/fallback)
- Add IconSelect grid for automation condition type and match type
- Replace mapped zone source dropdowns with EntitySelect pickers
- Replace scene target selector with EntityPalette.pick() pattern
- Remove effect palette preview bar from CSS editor
- Remove sensitivity badge from audio color strip source cards
- Clean up unused scene-selector CSS and scene-target-add-row CSS
- Add locale keys for all new UI elements across en/ru/zh

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/api/schemas/scene_presets.py

@@ -23,11 +23,12 @@ class ScenePresetCreate(BaseModel):
 
 
 class ScenePresetUpdate(BaseModel):
-    """Update scene preset metadata (not snapshot data — use recapture for that)."""
+    """Update scene preset metadata and optionally change which targets are included."""
 
     name: Optional[str] = Field(None, min_length=1, max_length=100)
     description: Optional[str] = Field(None, max_length=500)
     order: Optional[int] = None
+    target_ids: Optional[List[str]] = Field(None, description="Update target list: keep state for existing, capture fresh for new, drop removed")
 
 
 class ScenePresetResponse(BaseModel):