feat(tests): enhance test coverage and error handling across various components

- Added a test case in CrowdSecConfig to show improved error message when preset is not cached.
- Introduced a new test suite for the Dashboard component, verifying counts and health status.
- Updated SMTPSettings tests to utilize a shared render function and added tests for backend validation errors.
- Modified Security.audit tests to improve input handling and removed redundant export failure test.
- Refactored Security tests to remove export functionality and ensure correct rendering of components.
- Enhanced UsersPage tests with new scenarios for updating user permissions and manual invite link flow.
- Created a new utility for rendering components with a QueryClient and MemoryRouter for better test isolation.
- Updated go-test-coverage script to improve error handling and coverage reporting.

frontend/src/hooks/useNotifications.ts

@@ -0,0 +1,52 @@
+import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
+import {
+  getSecurityNotificationSettings,
+  updateSecurityNotificationSettings,
+  SecurityNotificationSettings,
+} from '../api/notifications';
+import { toast } from '../utils/toast';
+
+export function useSecurityNotificationSettings() {
+  return useQuery({
+    queryKey: ['security-notification-settings'],
+    queryFn: getSecurityNotificationSettings,
+  });
+}
+
+export function useUpdateSecurityNotificationSettings() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (settings: Partial<SecurityNotificationSettings>) =>
+      updateSecurityNotificationSettings(settings),
+    onMutate: async (newSettings) => {
+      // Cancel any outgoing refetches
+      await queryClient.cancelQueries({ queryKey: ['security-notification-settings'] });
+
+      // Snapshot the previous value
+      const previousSettings = queryClient.getQueryData(['security-notification-settings']);
+
+      // Optimistically update to the new value
+      queryClient.setQueryData(['security-notification-settings'], (old: unknown) => {
+        if (old && typeof old === 'object') {
+          return { ...old, ...newSettings };
+        }
+        return old;
+      });
+
+      return { previousSettings };
+    },
+    onError: (err, _newSettings, context) => {
+      // Rollback on error
+      if (context?.previousSettings) {
+        queryClient.setQueryData(['security-notification-settings'], context.previousSettings);
+      }
+      const message = err instanceof Error ? err.message : 'Failed to update notification settings';
+      toast.error(message);
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['security-notification-settings'] });
+      toast.success('Notification settings updated');
+    },
+  });
+}