feat: 新增数字员工管理页面与工作台首页重构

后端优化 agent 资产种子初始化和常量配置，前端新增数字员工
视图和调度对话框组件，重构个人工作台首页布局和洞察面板，
完善审计页面数字员工详情和运行时模型，优化侧边栏导航和图
标配置，新增工作台摘要和工作台数据模块，补充单元测试。

web/src/assets/styles/views/audit-view-part2.css

@@ -1810,6 +1810,40 @@
   background: #ffffff;
 }
 
+.digital-worker-source-card {
+  min-height: 0;
+}
+
+.digital-worker-source-card .card-head {
+  align-items: center;
+}
+
+.digital-worker-source-editor {
+  width: 100%;
+  min-height: 360px;
+  resize: vertical;
+  border: 1px solid #dbe4ef;
+  border-radius: 8px;
+  padding: 14px 16px;
+  background: #0f172a;
+  color: #e2e8f0;
+  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
+  font-size: 12.5px;
+  line-height: 1.7;
+  outline: none;
+}
+
+.digital-worker-source-editor:focus {
+  border-color: #2563eb;
+  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
+}
+
+.digital-worker-source-editor[readonly] {
+  color: #cbd5e1;
+  background: #1e293b;
+  cursor: default;
+}
+
 @media (max-width: 760px) {
   .risk-rule-create-form,
   .json-risk-meta-grid {