feat: add comprehensive tests for UI components, hooks, and API interactions

- Implement tests for Pagination, StatusBadge, ConfirmDialog, and MobileInput components.
- Add tests for useSubscription, usePaymentConfig, and usePwaInstall hooks.
- Create tests for API requests in the api module, including success and error handling.
- Add utility function tests for formatting and validating Iranian mobile numbers.
- Implement tests for BlogFormPage and BlogsPage to validate form submissions and data fetching.
- Add tests for LoginPage to ensure proper validation and state management.
- Create tests for authStore and uiStore to validate state management and functionality.
- Set up Vitest configuration and testing utilities for consistent testing environment.

assets/admin/pages/LoginPage.test.tsx

@@ -0,0 +1,41 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { renderWithProviders } from '@/test/utils';
+
+vi.mock('sonner', () => ({ toast: { success: vi.fn(), error: vi.fn() } }));
+vi.mock('@/components/ui/PwaLoginCard', () => ({ default: () => null }));
+
+import { toast } from 'sonner';
+import LoginPage from '@/pages/LoginPage';
+
+const errorToast = toast.error as ReturnType<typeof vi.fn>;
+
+beforeEach(() => {
+    vi.stubGlobal('fetch', vi.fn());
+});
+
+describe('LoginPage — حالت رمز عبور', () => {
+    it('submit با فیلد خالی → خطای اعتبارسنجی و بدون fetch', async () => {
+        renderWithProviders(<LoginPage />, { route: '/admin/login' });
+        await userEvent.click(screen.getByRole('button', { name: 'ورود به سیستم' }));
+        expect(errorToast).toHaveBeenCalledWith('شماره موبایل و رمز عبور الزامی است');
+        expect(fetch).not.toHaveBeenCalled();
+    });
+});
+
+describe('LoginPage — تعویض حالت', () => {
+    it('کلیک «ورود با پیامک» فرم پیامک را نشان می‌دهد', async () => {
+        renderWithProviders(<LoginPage />, { route: '/admin/login' });
+        await userEvent.click(screen.getByRole('button', { name: 'ورود با پیامک' }));
+        expect(screen.getByRole('button', { name: 'ارسال کد تأیید' })).toBeInTheDocument();
+    });
+
+    it('شماره موبایل نامعتبر در حالت پیامک → خطا', async () => {
+        renderWithProviders(<LoginPage />, { route: '/admin/login' });
+        await userEvent.click(screen.getByRole('button', { name: 'ورود با پیامک' }));
+        await userEvent.type(screen.getByPlaceholderText('09xxxxxxxxx'), '12345');
+        await userEvent.click(screen.getByRole('button', { name: 'ارسال کد تأیید' }));
+        expect(errorToast).toHaveBeenCalledWith('شماره موبایل معتبر نیست');
+    });
+});