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/personal-workbench-insights.css

@@ -0,0 +1,135 @@
+.side-column {
+  display: grid;
+  grid-template-rows: minmax(0, 0.94fr) minmax(0, 1fr);
+  gap: 14px;
+  min-height: 0;
+  height: 100%;
+}
+
+.side-panel {
+  padding: 10px 12px;
+  gap: 6px;
+}
+
+.side-panel .section-head {
+  min-height: 24px;
+  margin-bottom: 0;
+}
+
+.side-panel .section-head h2 {
+  font-size: 15px;
+}
+
+.side-card-head {
+  align-items: center;
+}
+
+.detail-action {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 4px;
+  min-height: 24px;
+  padding: 0;
+  border: 0;
+  background: transparent;
+  color: var(--workbench-muted);
+  font-size: 13px;
+  font-weight: 800;
+  white-space: nowrap;
+}
+
+.detail-action:hover {
+  color: var(--workbench-primary-active);
+}
+
+.detail-action i {
+  font-size: 16px;
+}
+
+.expense-stats-panel,
+.usage-profile-panel {
+  min-height: 0;
+  display: grid;
+  grid-template-rows: auto minmax(0, 1fr);
+}
+
+.insight-metric-list,
+.insight-profile-list {
+  min-height: 0;
+  display: grid;
+  grid-auto-rows: minmax(0, 1fr);
+  overflow: hidden;
+}
+
+.insight-metric-row,
+.insight-profile-card {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 10px;
+  min-height: 0;
+  padding: 6px 0;
+  border-top: 1px solid var(--workbench-line-soft);
+}
+
+.insight-metric-row:first-child,
+.insight-profile-card:first-child {
+  border-top: 0;
+}
+
+.insight-metric-label,
+.insight-profile-label {
+  min-width: 0;
+  overflow: hidden;
+  color: var(--workbench-muted);
+  font-size: 12px;
+  font-weight: 650;
+  line-height: 1.2;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.insight-metric-value,
+.insight-profile-value {
+  min-width: 0;
+  overflow: hidden;
+  color: var(--workbench-ink);
+  font-size: 14px;
+  font-weight: 850;
+  line-height: 1.15;
+  text-align: right;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-variant-numeric: tabular-nums;
+}
+
+.insight-metric-value small,
+.insight-profile-value small {
+  margin-left: 2px;
+  color: var(--workbench-muted);
+  font-size: 11px;
+  font-weight: 700;
+}
+
+.insight-metric-row--amount .insight-metric-value {
+  color: var(--workbench-primary-active);
+}
+
+.insight-metric-row--warning .insight-metric-value {
+  color: var(--warning);
+}
+
+.insight-metric-row--info .insight-metric-value {
+  color: var(--workbench-chart-blue);
+}
+
+.insight-profile-icon,
+.insight-profile-hint {
+  display: none;
+}
+
+.insight-profile-copy {
+  min-width: 0;
+  display: contents;
+}