feat(web): Kanban 看板页面 — dnd-kit 拖拽 + 跨列移动

- 新增 PluginKanbanPage 看板页面，支持 dnd-kit 拖拽
- 支持泳道分组、卡片标题/副标题/标签展示
- 乐观更新 UI，失败自动回滚
- 路由入口 /plugins/:pluginId/kanban/:entityName 自加载 schema
- PluginTabsPage 新增 kanban 页面类型支持
- PluginStore 新增 kanban 菜单项和路由生成
- 安装 @dnd-kit/core + @dnd-kit/sortable

apps/web/src/stores/plugin.ts

@@ -8,7 +8,7 @@ export interface PluginMenuItem {
   label: string;
   pluginId: string;
   entity?: string;
-  pageType: 'crud' | 'tree' | 'tabs' | 'detail' | 'graph' | 'dashboard';
+  pageType: 'crud' | 'tree' | 'tabs' | 'detail' | 'graph' | 'dashboard' | 'kanban';
 }
 
 export interface PluginMenuGroup {
@@ -128,6 +128,15 @@ export const usePluginStore = create<PluginStore>((set, get) => ({
               pluginId: plugin.id,
               pageType: 'dashboard' as const,
             });
+          } else if (page.type === 'kanban') {
+            items.push({
+              key: `/plugins/${plugin.id}/kanban/${page.entity}`,
+              icon: 'UnorderedListOutlined',
+              label: page.label,
+              pluginId: plugin.id,
+              entity: page.entity,
+              pageType: 'kanban' as const,
+            });
           }
           // detail 类型不生成菜单项
         }