feat(plugin,freelance,itops,web): P5-P6 dashboard widgets 平台扩展 + 仪表盘声明

P5 平台扩展:
- manifest.rs: Dashboard 变体新增 widgets 字段
- manifest.rs: 定义 PluginWidget/StatCard/ActionQuery 类型
- 前端: 扩展 DashboardWidget 类型支持 stat_cards/action_list/funnel/card_list
- 前端: 新增 4 个 widget 渲染器 (StatCardsWidget/ActionListWidget/FunnelStageWidget/CardListWidget)
- 前端: PluginDashboardPage widget 数据加载支持新类型

P6 仪表盘 widgets:
- freelance: 工作台仪表盘 4 个 widgets (财务概览/紧急待办/商机漏斗/活跃项目)
- itops: 新增运维概览仪表盘 2 个 widgets (运维概览/紧急待办)

crates/erp-plugin-itops/plugin.toml

@@ -546,6 +546,32 @@ format = "pdf"
 
 # ── 页面设计 ──
 
+# 页面 0：运维概览仪表盘
+[[ui.pages]]
+type = "dashboard"
+label = "运维概览"
+icon = "DashboardOutlined"
+
+  [[ui.pages.widgets]]
+  type = "stat_cards"
+  label = "运维概览"
+  cards = [
+    { entity = "service_contract", aggregate = "count", filter = "status == 'active'", label = "活跃合同", icon = "file-text", color = "blue" },
+    { entity = "ticket", aggregate = "count", filter = "status == 'open' || status == 'in_progress'", label = "待处理工单", icon = "tool", color = "orange" },
+    { entity = "ticket", aggregate = "count", filter = "status == 'resolved'", label = "已解决工单", icon = "check-circle", color = "green" },
+    { entity = "check_plan", aggregate = "count", filter = "status == 'active'", label = "活跃巡检", icon = "schedule", color = "blue" }
+  ]
+
+  [[ui.pages.widgets]]
+  type = "action_list"
+  label = "紧急待办"
+  max_items = 5
+  queries = [
+    { entity = "ticket", filter = "status == 'open'", sort = "priority asc", label_field = "title", subtitle_field = "type", action = "处理", icon = "warning" },
+    { entity = "service_contract", filter = "status == 'active'", sort = "end_date asc", label_field = "name", subtitle_field = "end_date", action = "续约", icon = "file-text" },
+    { entity = "check_plan", filter = "status == 'active'", sort = "next_check_date asc", label_field = "name", subtitle_field = "next_check_date", action = "巡检", icon = "schedule" }
+  ]
+
 # 页面 1：合同管理 + 详情
 [[ui.pages]]
 type = "crud"