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/components/digital-employee-schedule-dialog.css

@@ -0,0 +1,166 @@
+.digital-schedule-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1200;
+  display: flex;
+  align-items: flex-end;
+  justify-content: flex-end;
+  padding: 32px;
+  background: rgba(15, 23, 42, 0.28);
+}
+
+.digital-schedule-dialog {
+  width: min(520px, calc(100vw - 64px));
+  border-radius: 8px;
+  background: #fff;
+  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.22);
+  overflow: hidden;
+}
+
+.digital-schedule-head,
+.digital-schedule-actions {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 16px;
+  padding: 18px 20px;
+  border-bottom: 1px solid #e2e8f0;
+}
+
+.digital-schedule-head h3 {
+  margin: 4px 0 0;
+  color: #0f172a;
+  font-size: 18px;
+  font-weight: 820;
+}
+
+.digital-schedule-kicker {
+  color: #64748b;
+  font-size: 12px;
+  font-weight: 760;
+}
+
+.digital-schedule-close {
+  width: 32px;
+  height: 32px;
+  display: grid;
+  place-items: center;
+  border: 1px solid #dbe4ee;
+  border-radius: 6px;
+  background: #fff;
+  color: #475569;
+  cursor: pointer;
+}
+
+.digital-schedule-body {
+  padding: 18px 20px 20px;
+}
+
+.digital-schedule-mode-grid {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 8px;
+}
+
+.digital-schedule-mode {
+  min-height: 36px;
+  border: 1px solid #dbe4ee;
+  border-radius: 6px;
+  background: #fff;
+  color: #475569;
+  font-size: 13px;
+  font-weight: 760;
+  cursor: pointer;
+}
+
+.digital-schedule-mode.active {
+  border-color: rgba(var(--theme-primary-rgb), 0.42);
+  background: var(--theme-primary-soft);
+  color: var(--theme-primary-active);
+}
+
+.digital-schedule-fields {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 12px;
+  margin-top: 16px;
+}
+
+.digital-schedule-fields label {
+  display: grid;
+  gap: 6px;
+  color: #334155;
+  font-size: 13px;
+  font-weight: 760;
+}
+
+.digital-schedule-fields input,
+.digital-schedule-fields select {
+  width: 100%;
+  min-height: 38px;
+  border: 1px solid #dbe4ee;
+  border-radius: 6px;
+  padding: 0 10px;
+  color: #0f172a;
+  font: inherit;
+  background: #fff;
+}
+
+.digital-schedule-cron-field {
+  grid-column: 1 / -1;
+}
+
+.digital-schedule-preview {
+  margin: 16px 0 0;
+  padding: 10px 12px;
+  border-radius: 6px;
+  background: #f8fafc;
+  color: #475569;
+  font-size: 13px;
+  font-weight: 700;
+}
+
+.digital-schedule-error {
+  margin: 10px 0 0;
+  color: #b91c1c;
+  font-size: 13px;
+  font-weight: 760;
+}
+
+.digital-schedule-actions {
+  justify-content: flex-end;
+  border-top: 1px solid #e2e8f0;
+  border-bottom: 0;
+}
+
+.digital-schedule-actions .success-action {
+  border-color: var(--success-line);
+  background: var(--success-soft);
+  color: var(--success-hover);
+}
+
+.digital-schedule-dialog-enter-active,
+.digital-schedule-dialog-leave-active {
+  transition: opacity 160ms ease;
+}
+
+.digital-schedule-dialog-enter-from,
+.digital-schedule-dialog-leave-to {
+  opacity: 0;
+}
+
+@media (max-width: 720px) {
+  .digital-schedule-overlay {
+    align-items: flex-end;
+    padding: 16px;
+  }
+
+  .digital-schedule-dialog {
+    width: 100%;
+  }
+
+  .digital-schedule-mode-grid,
+  .digital-schedule-fields {
+    grid-template-columns: 1fr;
+  }
+}