feat: enhance child edit and view components with improved form handling and validation

- Added `requireDirty` prop to `EntityEditForm` for dirty state management.
- Updated `ChildEditView` to handle initial data loading and image selection more robustly.
- Refactored `ChildView` to remove unused reward dialog logic and prevent API calls in child mode.
- Improved type definitions for form fields and initial data in `ChildEditView`.
- Enhanced error handling in form submissions across components.
- Implemented cross-tab logout synchronization on password reset in the auth store.
- Added tests for login and entity edit form functionalities to ensure proper behavior.
- Introduced global fetch interceptor for handling unauthorized responses.
- Documented password reset flow and its implications on session management.

frontend/vue-app/src/components/profile/UserProfile.vue

@@ -117,7 +117,6 @@ import '@/assets/styles.css'
 const router = useRouter()
 const loading = ref(false)
 const errorMsg = ref('')
-const successMsg = ref('')
 const resetting = ref(false)
 const localImageFile = ref<File | null>(null)
 const showModal = ref(false)
@@ -133,14 +132,26 @@ const showDeleteSuccess = ref(false)
 const showDeleteError = ref(false)
 const deleteErrorMessage = ref('')
 
-const initialData = ref({
+const initialData = ref<{
+  image_id: string | null
+  first_name: string
+  last_name: string
+  email: string
+}>({
   image_id: null,
   first_name: '',
   last_name: '',
   email: '',
 })
 
-const fields = [
+const fields: Array<{
+  name: string
+  label: string
+  type: 'image' | 'text' | 'custom'
+  imageType?: number
+  required?: boolean
+  maxlength?: number
+}> = [
   { name: 'image_id', label: 'Image', type: 'image', imageType: 1 },
   { name: 'first_name', label: 'First Name', type: 'text', required: true, maxlength: 64 },
   { name: 'last_name', label: 'Last Name', type: 'text', required: true, maxlength: 64 },