feat(P25-2/P25-3/P26-2/P28-1/P24-2/P29-3): 落地内部OA够用版前端入口与运营页面

关联 Issue: P25-2, P25-3, P25-4, P26-2, P26-4, P28-1, P28-2, P28-3, P28-4, P24-2, P29-3

client/src/api/portal.ts

@@ -0,0 +1,15 @@
+import { apiRequestData } from "./http";
+
+export type PortalHomePayload = {
+  greeting: { name: string };
+  cards: Array<{ key: string; title: string; value: string | number; href: string; severity?: "normal" | "warning" | "high" }>;
+  pendingTasks: { count: number; href: string };
+  myApplications: Array<{ domain: string; count: number; href: string }>;
+  riskSummary: { openCount: number; href: string } | null;
+  announcements: Array<{ id: string; title: string; summary: string; href: string | null }>;
+  quickLinks: Array<{ key: string; title: string; href: string }>;
+};
+
+export async function fetchPortalHome() {
+  return apiRequestData<PortalHomePayload>("/api/portal/home");
+}