feat(dashboard): 工作台前端四区块与 ECharts 图表

- /dashboard 由 Bento 占位升级：KPI 四卡（本月绩效/应付/核算人数/团队数+月结状态）、近 6 个月绩效折线与回款柱状、待办/预警列表与跳转、最近动态时间线（按模块筛选）、常用操作
- ECharts 5.6 按需引入（core + Bar/Line/Grid/Tooltip + SVGRenderer）；textStyle.fontFamily 显式设为思源黑体栈（Windows 默认雅黑，字体商用合规红线）
- 路由 allowedRoles admin/finance/leader，与后端 require_roles 双层
- 新增依赖 echarts@5.6.0

Co-Authored-By: Claude Code <noreply@anthropic.com>

frontend/pnpm-lock.yaml

@@ -14,6 +14,9 @@ importers:
       axios:
         specifier: ^1.20.0
         version: 1.20.0(debug@4.4.3)
+      echarts:
+        specifier: ^5.6.0
+        version: 5.6.0
       element-plus:
         specifier: ^2.14.7
         version: 2.14.7(vue@3.5.43(typescript@5.9.3))
@@ -399,6 +402,9 @@ packages:
     resolution: {integrity: sha512-KIN/nDJBQRcXw0MLVhZE9iQHmG68qAVIBg9CqmUYjmQIhgij9U5MFvrqkUL5FbtyyzZuOeOt0zdeRe4UY7ct+A==}
     engines: {node: '>= 0.4'}
 
+  echarts@5.6.0:
+    resolution: {integrity: sha512-oTbVTsXfKuEhxftHqL5xprgLoc0k7uScAwtryCgWF6hPYFLRwOUHiFmHGCBKP5NPFNkDVopOieyUqYGH8Fa3kA==}
+
   element-plus@2.14.7:
     resolution: {integrity: sha512-lrG7pZyCS+mpCNVpzxxyu5r35+T6V0hzkAeIwn7HA6to772XSTHKuYCZG51OfzlqaxGbNegLxs650zAF1j43gA==}
     peerDependencies:
@@ -693,6 +699,9 @@ packages:
     resolution: {integrity: sha512-wXR/dYpcqKmfWpEdZjiKJOwCNFndD0DMnrW/cYjVGttEkBfVgcLFHoNrlj47mjOVic9yyNu65alsgF4NQyTa2g==}
     engines: {node: '>=12.0.0'}
 
+  tslib@2.3.0:
+    resolution: {integrity: sha512-N82ooyxVNm6h1riLCoyS9e3fuJ3AMG2zIZs2Gd1ATcSFjSA23Q0fzjjZeh0jbJvWVDZ0cJT8yaNNaaXHzueNjg==}
+
   typescript@5.9.3:
     resolution: {integrity: sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==}
     engines: {node: '>=14.17'}
@@ -828,6 +837,9 @@ packages:
   webpack-virtual-modules@0.6.2:
     resolution: {integrity: sha512-66/V2i5hQanC51vBQKPH4aI8NMAcBW59FVBs+rC7eGHupMyfn34q7rZIE+ETlJ+XTevqfUhVVBgSUNSW2flEUQ==}
 
+  zrender@5.6.1:
+    resolution: {integrity: sha512-OFXkDJKcrlx5su2XbzJvj/34Q3m6PvyCZkVPHGYpcCJ52ek4U/ymZyfuV1nKE23AyBJ51E/6Yr0mhZ7xGTO4ag==}
+
 snapshots:
 
   '@babel/helper-string-parser@7.29.7': {}
@@ -1155,6 +1167,11 @@ snapshots:
       es-errors: 1.3.0
       gopd: 1.2.0
 
+  echarts@5.6.0:
+    dependencies:
+      tslib: 2.3.0
+      zrender: 5.6.1
+
   element-plus@2.14.7(vue@3.5.43(typescript@5.9.3)):
     dependencies:
       '@ctrl/tinycolor': 4.2.1
@@ -1435,6 +1452,8 @@ snapshots:
       fdir: 6.5.0(picomatch@4.0.7)
       picomatch: 4.0.7
 
+  tslib@2.3.0: {}
+
   typescript@5.9.3: {}
 
   ufo@1.6.4: {}
@@ -1521,3 +1540,7 @@ snapshots:
       typescript: 5.9.3
 
   webpack-virtual-modules@0.6.2: {}
+
+  zrender@5.6.1:
+    dependencies:
+      tslib: 2.3.0