feat(core/frontend): wire P0 team mgmt / recharge / notifications

- App.tsx: load notifications, expose team/recharge/notification handlers, real unread bell count (was hardcoded 12)
- team.tsx: create/edit/reset-password/remove member + team recharge modals
- account.tsx: recharge via wechat/alipay buttons + custom amount
- messages.tsx: real notification inbox, mark-read on select, mark-all-read
- verified: tsc --noEmit clean; e2e create->update->reset->recharge->mark-read->delete all green

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

core/frontend/src/api.ts

@@ -5,9 +5,12 @@ import type {
   BillingSummary,
   Ledger,
   ModelConfig,
+  Notification,
+  NotificationList,
   Paginated,
   Product,
   Project,
+  RechargeResult,
   ScriptVersion,
   Team,
   TeamMember,
@@ -69,6 +72,28 @@ export const api = {
   teamMembers() {
     return request<TeamMember[]>("/api/auth/team/members/");
   },
+  createTeamMember(payload: {
+    username: string;
+    password: string;
+    name?: string;
+    email?: string;
+    role?: string;
+    monthly_credit_limit?: number | string;
+  }) {
+    return request<TeamMember>("/api/auth/team/members/", { method: "POST", body: JSON.stringify(payload) });
+  },
+  updateTeamMember(id: string, payload: { role?: string; monthly_credit_limit?: number | string; name?: string }) {
+    return request<TeamMember>(`/api/auth/team/members/${id}/`, { method: "PATCH", body: JSON.stringify(payload) });
+  },
+  removeTeamMember(id: string) {
+    return request<void>(`/api/auth/team/members/${id}/`, { method: "DELETE" });
+  },
+  resetMemberPassword(id: string, password: string) {
+    return request<void>(`/api/auth/team/members/${id}/password/`, {
+      method: "POST",
+      body: JSON.stringify({ password })
+    });
+  },
   products() {
     return request<Paginated<Product>>("/api/products/");
   },
@@ -157,5 +182,23 @@ export const api = {
   },
   aiTasks() {
     return request<Paginated<AITask>>("/api/ai/tasks/");
+  },
+  recharge(payload: { amount: number | string; bonus?: number | string; channel?: string }) {
+    return request<RechargeResult>("/api/billing/recharge/", { method: "POST", body: JSON.stringify(payload) });
+  },
+  listNotifications(params?: { type?: string; unread?: boolean }) {
+    const query = new URLSearchParams();
+    if (params?.type && params.type !== "all") query.set("type", params.type);
+    if (params?.unread) query.set("unread", "1");
+    const qs = query.toString();
+    return request<NotificationList>(`/api/ops/notifications/${qs ? `?${qs}` : ""}`);
+  },
+  markAllNotificationsRead() {
+    return request<{ updated: number; unread_count: number }>("/api/ops/notifications/mark-all-read/", {
+      method: "POST"
+    });
+  },
+  markNotificationRead(id: string) {
+    return request<Notification>(`/api/ops/notifications/${id}/mark-read/`, { method: "POST" });
   }
 };