feat: complete admin backend controllers and services

- AdminPlansController & Service (CRUD, reorder)
- AdminPaymentMethodsController & Service (CRUD, reorder)
- AdminPaymentsController & Service (verify, reject, pending count)
- AdminUsersController & Service (search, suspend, grant pro access, stats)
- AdminConfigController & Service (dynamic config management)
- Wire all controllers into AdminModule
- Import AdminModule in AppModule

Admin API Routes:
- GET/POST/PUT/DELETE /admin/plans
- GET/POST/PUT/DELETE /admin/payment-methods
- GET /admin/payments (with status filter)
- POST /admin/payments/:id/verify
- POST /admin/payments/:id/reject
- GET /admin/users (with search)
- POST /admin/users/:id/grant-pro
- GET/POST/DELETE /admin/config

All routes protected by AuthGuard + AdminGuard

apps/api/dist/auth/jwt.strategy.d.ts

@@ -6,7 +6,7 @@ export interface JwtPayload {
     iat?: number;
     exp?: number;
 }
-declare const JwtStrategy_base: new (...args: [opt: import("passport-jwt").StrategyOptionsWithoutRequest] | [opt: import("passport-jwt").StrategyOptionsWithRequest]) => Strategy & {
+declare const JwtStrategy_base: new (...args: [opt: import("passport-jwt").StrategyOptionsWithRequest] | [opt: import("passport-jwt").StrategyOptionsWithoutRequest]) => Strategy & {
     validate(...args: any[]): unknown;
 };
 export declare class JwtStrategy extends JwtStrategy_base {