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/admin/admin-payments.service.js

@@ -123,7 +123,20 @@ let AdminPaymentsService = class AdminPaymentsService {
             },
         });
         const monthlyData = {};
-        const months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
+        const months = [
+            'Jan',
+            'Feb',
+            'Mar',
+            'Apr',
+            'May',
+            'Jun',
+            'Jul',
+            'Aug',
+            'Sep',
+            'Oct',
+            'Nov',
+            'Dec',
+        ];
         payments.forEach((payment) => {
             if (payment.paidAt) {
                 const date = new Date(payment.paidAt);