Major graph editor improvements: standalone features, touch, docking, UX

Graph standalone features:
- Clone button on all entity nodes (copy icon, watches for new entity)
- Scene preset activation button (play icon, calls /activate API)
- Automation enable/disable via start/stop toggle (PUT enabled)
- Add missing entity types: sync_clock, scene_preset, pattern_template
- Fix edit/delete handlers for cspt, sync_clock
- CSPT added to test/preview button kinds
- Bulk delete with multi-select + Delete key confirmation
- Undo/redo framework with toolbar buttons (disabled when empty)
- Keyboard shortcuts help panel (? key, draggable, anchor-persisted)
- Enhanced search: type:device, tag:production filter syntax
- Tags passed through to all graph nodes for tag-based filtering
- Filter popover with grouped checkboxes replaces flat pill row

Touch device support:
- Pinch-to-zoom with 2-finger gesture tracking
- Double-tap zoom toggle (1.0x ↔ 1.8x)
- Multi-touch pointer tracking with pinch-to-pan
- Overlay buttons and port labels visible on selected (tapped) nodes
- Larger touch targets for ports (@media pointer: coarse)
- touch-action: none on SVG canvas
- 10px dead zone for touch vs 4px for mouse

Visual improvements:
- Port pin labels shown outside node on hover/select (outlined text)
- Hybrid active edge flow: thicker + glow + animated dots
- Test/preview icon changed to flask (matching card tabs)
- Clone icon scaled down to 60% for compact overlay buttons
- Monospace font for metric values (stable-width digits)
- Hide scrollbar on graph tab (html:has override)

Toolbar docking:
- 8-position dock system (4 corners + 4 side midpoints)
- Vertical layout when docked to left/right sides
- Dock position indicators shown during drag (dots with highlight)
- Snap animation on drop
- Persisted dock position in localStorage

Resize handling:
- View center preserved on fullscreen/window resize (ResizeObserver)
- All docked panels re-anchored on container resize
- Zoom inertia for wheel and toolbar +/- buttons

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

server/src/wled_controller/static/locales/en.json

@@ -1512,7 +1512,7 @@
   "graph.add_entity": "Add entity",
   "graph.color_picker": "Node color",
   "graph.filter": "Filter nodes",
-  "graph.filter_placeholder": "Filter by name...",
+  "graph.filter_placeholder": "Filter: name, type:x, tag:x",
   "graph.filter_clear": "Clear filter",
   "graph.filter_running": "Running",
   "graph.filter_stopped": "Stopped",
@@ -1521,5 +1521,37 @@
   "graph.filter_group.strip": "Color Strip",
   "graph.filter_group.audio": "Audio",
   "graph.filter_group.targets": "Targets",
-  "graph.filter_group.other": "Other"
+  "graph.filter_group.other": "Other",
+  "graph.bulk_delete_confirm": "Delete {count} selected entities?",
+  "graph.nothing_to_undo": "Nothing to undo",
+  "graph.nothing_to_redo": "Nothing to redo",
+  "graph.help_title": "Keyboard Shortcuts",
+  "graph.help.search": "Search",
+  "graph.help.filter": "Filter",
+  "graph.help.add": "Add entity",
+  "graph.help.shortcuts": "Shortcuts",
+  "graph.help.delete": "Delete / Detach",
+  "graph.help.select_all": "Select all",
+  "graph.help.undo": "Undo",
+  "graph.help.redo": "Redo",
+  "graph.help.fullscreen": "Fullscreen",
+  "graph.help.deselect": "Deselect",
+  "graph.help.navigate": "Navigate nodes",
+  "graph.help.click": "Click",
+  "graph.help.click_desc": "Select node",
+  "graph.help.dblclick": "Double-click",
+  "graph.help.dblclick_desc": "Zoom to node",
+  "graph.help.shift_click": "Shift+Click",
+  "graph.help.shift_click_desc": "Multi-select",
+  "graph.help.shift_drag": "Shift+Drag",
+  "graph.help.shift_drag_desc": "Rubber-band select",
+  "graph.help.drag_node": "Drag node",
+  "graph.help.drag_node_desc": "Reposition",
+  "graph.help.drag_port": "Drag port",
+  "graph.help.drag_port_desc": "Connect entities",
+  "graph.help.right_click": "Right-click edge",
+  "graph.help.right_click_desc": "Detach connection",
+  "automation.enabled": "Automation enabled",
+  "automation.disabled": "Automation disabled",
+  "scene_preset.activated": "Preset activated"
 }