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/static/css/graph-editor.css

@@ -83,27 +83,44 @@
 .graph-legend {
     position: absolute;
     top: 12px;
-    right: 12px;
     z-index: 20;
     background: var(--card-bg);
     border: 1px solid var(--border-color);
     border-radius: 8px;
-    padding: 10px 14px;
     box-shadow: 0 2px 8px var(--shadow-color);
     font-size: 0.8rem;
     display: none;
-    max-height: 60vh;
-    overflow-y: auto;
+    overflow: hidden;
 }
 
 .graph-legend.visible {
     display: block;
 }
 
+.graph-legend-header {
+    display: flex;
+    align-items: center;
+    padding: 4px 10px;
+    background: var(--bg-secondary);
+    border-bottom: 1px solid var(--border-color);
+    cursor: grab;
+    user-select: none;
+}
+
+.graph-legend-header.dragging {
+    cursor: grabbing;
+}
+
 .graph-legend-title {
     font-weight: 600;
-    margin-bottom: 6px;
-    color: var(--text-color);
+    font-size: 0.7rem;
+    color: var(--text-muted);
+}
+
+.graph-legend-body {
+    padding: 6px 12px;
+    max-height: 55vh;
+    overflow-y: auto;
 }
 
 .graph-legend-item {
@@ -112,6 +129,7 @@
     gap: 8px;
     padding: 2px 0;
     color: var(--text-secondary);
+    white-space: nowrap;
 }
 
 .graph-legend-dot {