feat: 完成P6-P8前端能力闭环（V3,D2,D3,B3）

client/src/router/index.tsx

@@ -4,6 +4,7 @@ import { AuthLayout } from "../layouts/AuthLayout";
 import { AuditLogsPage } from "../pages/AuditLogsPage";
 import { ApprovalRulesPage } from "../pages/ApprovalRulesPage";
 import { ChangePasswordPage } from "../pages/ChangePasswordPage";
+import { BudgetsPage } from "../pages/BudgetsPage";
 import { DashboardPage } from "../pages/DashboardPage";
 import { DepartmentsPage } from "../pages/DepartmentsPage";
 import { DelegationsPage } from "../pages/DelegationsPage";
@@ -56,6 +57,15 @@ export function AppRouter() {
         <Route index element={<Navigate to="/dashboard" replace />} />
         <Route path="dashboard" element={<DashboardPage />} />
 
+        <Route
+          path="budgets"
+          element={
+            <RequirePermission anyOf={["budget.view", "budget.manage"]}>
+              <BudgetsPage />
+            </RequirePermission>
+          }
+        />
+
         <Route
           path="reimbursements"
           element={