feat: 补齐报销付款待办交接（09-11-reimbursement-payment-handoffs）

client/src/api/portal.ts

@@ -79,6 +79,19 @@ export type PortalHomePayload = {
     canViewTeam: boolean;
     isAdminOnly: boolean;
   };
+  businessHandoffs?: {
+    total: number;
+    items: Array<{
+      key: string;
+      kind: "reimbursement_edit" | "reimbursement_batch" | "payment_review" | "payment_execute";
+      reference: string | null;
+      title: string;
+      nextStep: string;
+      ownerLabel: string;
+      href: string;
+      mobileHref: string;
+    }>;
+  };
   financeSummary?: {
     pendingBatchCount: number;
     failedItemCount: number;