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-freelance/plugin.toml

@@ -1079,6 +1079,49 @@ type = "dashboard"
 label = "工作台"
 icon = "DashboardOutlined"
 
+  # ── 财务概览卡片 ──
+  [[ui.pages.widgets]]
+  type = "stat_cards"
+  label = "财务概览"
+  cards = [
+    { entity = "invoice", aggregate = "sum", field = "amount", filter = "type == 'payment' && status != 'overdue'", label = "本月收入", icon = "rise", color = "green" },
+    { entity = "expense", aggregate = "sum", field = "amount", label = "本月支出", icon = "fall", color = "red" },
+    { entity = "invoice", aggregate = "sum", field = "amount", filter = "status == 'overdue' || status == 'pending'", label = "应收总额", icon = "dollar", color = "orange" },
+    { entity = "invoice", aggregate = "count", filter = "status == 'overdue'", label = "逾期笔数", icon = "warning", color = "red" }
+  ]
+
+  # ── 紧急待办 ──
+  [[ui.pages.widgets]]
+  type = "action_list"
+  label = "紧急待办"
+  max_items = 5
+  queries = [
+    { entity = "invoice", filter = "status == 'overdue'", label_field = "invoice_number", subtitle_field = "amount", action = "查看", icon = "warning" },
+    { entity = "task", filter = "status != 'done' && status != 'cancelled'", sort = "due_date asc", label_field = "title", subtitle_field = "due_date", action = "处理", icon = "clock" },
+    { entity = "contract", filter = "status == 'active'", sort = "end_date asc", label_field = "title", subtitle_field = "end_date", action = "续约", icon = "file-text" },
+    { entity = "opportunity", filter = "next_follow_up <= today", label_field = "title", subtitle_field = "next_follow_up", action = "跟进", icon = "phone" }
+  ]
+
+  # ── 商机漏斗 ──
+  [[ui.pages.widgets]]
+  type = "funnel"
+  label = "商机漏斗"
+  entity = "opportunity"
+  lane_field = "stage"
+  value_field = "estimated_amount"
+  lane_order = ["visit", "requirement", "quote", "negotiation", "won", "lost"]
+
+  # ── 活跃项目卡片 ──
+  [[ui.pages.widgets]]
+  type = "card_list"
+  label = "活跃项目"
+  entity = "project"
+  filter = "status == 'in_progress'"
+  max_items = 4
+  title_field = "name"
+  subtitle_field = "contract_amount"
+  tags = ["business_type", "status"]
+
 # 页面 2：客户管理（列表 + 详情 + 商机看板）
 [[ui.pages]]
 type = "tabs"