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/zh.json

@@ -1521,5 +1521,37 @@
   "graph.filter_group.strip": "色带",
   "graph.filter_group.audio": "音频",
   "graph.filter_group.targets": "目标",
-  "graph.filter_group.other": "其他"
+  "graph.filter_group.other": "其他",
+  "graph.bulk_delete_confirm": "删除 {count} 个选中的实体？",
+  "graph.nothing_to_undo": "没有可撤销的操作",
+  "graph.nothing_to_redo": "没有可重做的操作",
+  "graph.help_title": "键盘快捷键",
+  "graph.help.search": "搜索",
+  "graph.help.filter": "筛选",
+  "graph.help.add": "添加实体",
+  "graph.help.shortcuts": "快捷键",
+  "graph.help.delete": "删除 / 断开",
+  "graph.help.select_all": "全选",
+  "graph.help.undo": "撤销",
+  "graph.help.redo": "重做",
+  "graph.help.fullscreen": "全屏",
+  "graph.help.deselect": "取消选择",
+  "graph.help.navigate": "节点导航",
+  "graph.help.click": "单击",
+  "graph.help.click_desc": "选择节点",
+  "graph.help.dblclick": "双击",
+  "graph.help.dblclick_desc": "缩放到节点",
+  "graph.help.shift_click": "Shift+单击",
+  "graph.help.shift_click_desc": "多选",
+  "graph.help.shift_drag": "Shift+拖拽",
+  "graph.help.shift_drag_desc": "框选",
+  "graph.help.drag_node": "拖拽节点",
+  "graph.help.drag_node_desc": "重新定位",
+  "graph.help.drag_port": "拖拽端口",
+  "graph.help.drag_port_desc": "连接实体",
+  "graph.help.right_click": "右键边线",
+  "graph.help.right_click_desc": "断开连接",
+  "automation.enabled": "自动化已启用",
+  "automation.disabled": "自动化已禁用",
+  "scene_preset.activated": "预设已激活"
 }