Refactor frontend components and enhance API integration

- Updated frontend-nuxt.mdc to specify usage of composables for API calls.
- Added new AuthCard and ConfirmModal components for improved UI consistency.
- Introduced UserAvatar component for user profile display, replacing previous Gravatar implementation.
- Implemented useFormSubmit composable for handling form submissions with loading and error states.
- Enhanced vitest.config.ts to include coverage reporting for composables and components.
- Removed deprecated useAdminApi and useAuth composables to streamline API interactions.
- Updated login and setup pages to utilize new components and composables for better user experience.

internal/app/migrations.go

@@ -73,7 +73,9 @@ var migrations = []func(tx *bbolt.Tx) error{
 				allTiles[string(k)] = zoomTiles
 				return zoom.ForEach(func(tk, tv []byte) error {
 					td := TileData{}
-					json.Unmarshal(tv, &td)
+					if err := json.Unmarshal(tv, &td); err != nil {
+						return err
+					}
 					zoomTiles[string(tk)] = td
 					return nil
 				})
@@ -161,7 +163,9 @@ var migrations = []func(tx *bbolt.Tx) error{
 		}
 		return users.ForEach(func(k, v []byte) error {
 			u := User{}
-			json.Unmarshal(v, &u)
+			if err := json.Unmarshal(v, &u); err != nil {
+				return err
+			}
 			if u.Auths.Has(AUTH_MAP) && !u.Auths.Has(AUTH_MARKERS) {
 				u.Auths = append(u.Auths, AUTH_MARKERS)
 				raw, err := json.Marshal(u)