Unify graph docking, fix device hot-switch, and compact UI cards

- Unify minimap/toolbar/legend drag+dock into shared _makeDraggable() helper
- Persist legend visibility and position, add active state to toggle buttons
- Show custom colors only on graph cards (entity defaults remain in legend)
- Replace emoji overlay buttons with SVG path icons
- Fix stale is_running blocking target start (auto-clear if task is done)
- Resolve device/target IDs to names in conflict error messages
- Hot-switch LED device on running target via async stop-swap-start cycle
- Compact automation dashboard cards and fix time_of_day localization
- Inline CSS source pill on target cards to save vertical space

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

server/src/wled_controller/storage/wled_output_target.py

@@ -42,9 +42,12 @@ class WledOutputTarget(OutputTarget):
 
     def sync_with_manager(self, manager, *, settings_changed: bool,
                           css_changed: bool = False,
-                          device_changed: bool = False,
                           brightness_vs_changed: bool = False) -> None:
-        """Push changed fields to the processor manager."""
+        """Push changed fields to the processor manager.
+
+        NOTE: device_changed is handled separately in the route because
+        update_target_device is async (stop → swap → start cycle).
+        """
         if settings_changed:
             manager.update_target_settings(self.id, {
                 "fps": self.fps,
@@ -55,8 +58,6 @@ class WledOutputTarget(OutputTarget):
             })
         if css_changed:
             manager.update_target_css(self.id, self.color_strip_source_id)
-        if device_changed:
-            manager.update_target_device(self.id, self.device_id)
         if brightness_vs_changed:
             manager.update_target_brightness_vs(self.id, self.brightness_value_source_id)