refactor: 菜单栏角色化降噪（role-based-navigation-simplification）

client/src/pages/PortalHomePage.tsx

@@ -163,8 +163,8 @@ function buildTodoAggregateItems(payload: PortalHomePayload) {
   const items: TodoAggregateItem[] = [];
   if (payload.pendingTasks.count > 0) {
     items.push({
-      title: `审批待办 ${payload.pendingTasks.count} 条`,
-      sourceLabel: "审批",
+      title: `待我处理 ${payload.pendingTasks.count} 条`,
+      sourceLabel: "待办",
       severity: "warning",
       href: payload.pendingTasks.href,
       icon: "fact_check",
@@ -925,9 +925,9 @@ export function PortalHomePage() {
       ? {
           key: "approval-pending",
           href: payload.pendingTasks.href,
-          label: "审批待办",
+          label: "待我处理",
           value: `${payload.pendingTasks.count} 条`,
-          note: payload.pendingTasks.count > 0 ? "进入审批中心处理。" : "暂无待处理审批。",
+          note: payload.pendingTasks.count > 0 ? "进入待我处理办理。" : "暂无待处理事项。",
           tone: payload.pendingTasks.count > 0 ? "warning" as const : "normal" as const,
         }
       : null,
@@ -1051,7 +1051,7 @@ export function PortalHomePage() {
       ? { label: "报销进度", to: "/reimbursements" }
       : null,
     payload.pendingTasks.count > 0 && approvalAction?.to
-      ? { label: "审批中心", to: approvalAction.to }
+      ? { label: "待我处理", to: approvalAction.to }
       : null,
     todoAggregateItems.length > 1
       ? { label: "全部待办", to: "/todos" }