feat: reorganize admin settings with tabbed interface and documentation

- Reorganized admin settings into tabbed interface (General, Security, Payment Methods)
- Vertical tabs on desktop, horizontal scrollable on mobile
- Moved Payment Methods from separate menu to Settings tab
- Fixed admin profile reuse and dashboard blocking
- Fixed maintenance mode guard to use AppConfig model
- Added admin auto-redirect after login (admins → /admin, users → /)
- Reorganized documentation into docs/ folder structure
- Created comprehensive README and documentation index
- Added PWA and Web Push notifications to to-do list

apps/api/dist/common/guards/maintenance.guard.js

@@ -0,0 +1,71 @@
+"use strict";
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.MaintenanceGuard = void 0;
+const common_1 = require("@nestjs/common");
+const core_1 = require("@nestjs/core");
+const prisma_service_1 = require("../../prisma/prisma.service");
+const jwt_1 = require("@nestjs/jwt");
+let MaintenanceGuard = class MaintenanceGuard {
+    reflector;
+    prisma;
+    jwtService;
+    constructor(reflector, prisma, jwtService) {
+        this.reflector = reflector;
+        this.prisma = prisma;
+        this.jwtService = jwtService;
+    }
+    async canActivate(context) {
+        const isExempt = this.reflector.get('skipMaintenance', context.getHandler());
+        const isControllerExempt = this.reflector.get('skipMaintenance', context.getClass());
+        if (isExempt || isControllerExempt) {
+            return true;
+        }
+        const maintenanceConfig = await this.prisma.appConfig.findUnique({
+            where: { key: 'maintenance_mode' },
+        });
+        const isMaintenanceMode = maintenanceConfig?.value === 'true';
+        if (!isMaintenanceMode) {
+            return true;
+        }
+        const request = context.switchToHttp().getRequest();
+        const authHeader = request.headers.authorization;
+        if (authHeader && authHeader.startsWith('Bearer ')) {
+            try {
+                const token = authHeader.substring(7);
+                const payload = this.jwtService.verify(token);
+                if (payload.role === 'admin') {
+                    return true;
+                }
+            }
+            catch (error) {
+            }
+        }
+        const messageConfig = await this.prisma.appConfig.findUnique({
+            where: { key: 'maintenance_message' },
+        });
+        const message = messageConfig?.value ||
+            'System is under maintenance. Please try again later.';
+        throw new common_1.ServiceUnavailableException({
+            statusCode: 503,
+            message: message,
+            maintenanceMode: true,
+        });
+    }
+};
+exports.MaintenanceGuard = MaintenanceGuard;
+exports.MaintenanceGuard = MaintenanceGuard = __decorate([
+    (0, common_1.Injectable)(),
+    __metadata("design:paramtypes", [core_1.Reflector,
+        prisma_service_1.PrismaService,
+        jwt_1.JwtService])
+], MaintenanceGuard);
+//# sourceMappingURL=maintenance.guard.js.map