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/api/routes/output_targets.py

@@ -315,12 +315,18 @@ async def update_target(
                                   data.adaptive_fps is not None or
                                   data.key_colors_settings is not None),
                 css_changed=data.color_strip_source_id is not None,
-                device_changed=data.device_id is not None,
                 brightness_vs_changed=(data.brightness_value_source_id is not None or kc_brightness_vs_changed),
             )
         except ValueError:
             pass
 
+        # Device change requires async stop → swap → start cycle
+        if data.device_id is not None:
+            try:
+                await manager.update_target_device(target_id, target.device_id)
+            except ValueError:
+                pass
+
         fire_entity_event("output_target", "updated", target_id)
         return _target_to_response(target)
 
@@ -389,7 +395,12 @@ async def start_processing(
     except ValueError as e:
         raise HTTPException(status_code=404, detail=str(e))
     except RuntimeError as e:
-        raise HTTPException(status_code=409, detail=str(e))
+        # Resolve target IDs to human-readable names in error messages
+        msg = str(e)
+        for t in target_store.get_all_targets():
+            if t.id in msg:
+                msg = msg.replace(t.id, f"'{t.name}'")
+        raise HTTPException(status_code=409, detail=msg)
     except Exception as e:
         logger.error(f"Failed to start processing: {e}")
         raise HTTPException(status_code=500, detail=str(e))