refactor(layouts): merge portal navbar/drawer into PortalLayout.vue

Migrates the navbar (event/platform two-mode toggle), mobile drawer
with avatar header + logout, RouterView Suspense wrapper, and footer
from apps/portal/src/layouts/portal.vue into the PortalLayout.vue
skeleton from PR-A. The skeleton's structure (VApp / VAppBar / VMain
/ VFooter) is preserved as the outer shell.

Notable adaptations:
  - useAuthStore → usePortalAuthStore (renamed in C.3)
  - usePortalStore import path → @/stores/portal/usePortalStore
  - mobile nav links now point at /portal/evenementen and /portal/profiel
    (the new sub-zone paths) instead of /evenementen and /profiel
  - explicit `import { useRoute, useRouter }` from vue-router so the
    vitest mock can intercept (auto-import not configured for these in
    the trimmed test config)

Updated PortalLayout.spec.ts to mock the two pinia stores plus
useSkins, vue-router, UserAvatarMenu, and AppLoadingIndicator. Tests
now assert the auth-conditional rendering: header + drawer hidden
when unauthenticated, main + footer always present.

Also pulls in the @form-schema → @/composables/forms/* import
rewrites in the C.4-moved composables that the previous commit's
rename-only diff left unstaged.

Vitest: 23 files / 162 tests, no errors.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/app/src/composables/api/__tests__/usePublicFormSections.spec.ts

@@ -9,7 +9,7 @@ vi.mock('@/lib/axios', () => ({
 
 import { apiClient } from '@/lib/axios'
 import { usePublicFormSections } from '@/composables/api/usePublicFormSections'
-import type { PublicFormSectionOption } from '@form-schema/types/formBuilder'
+import type { PublicFormSectionOption } from '@/composables/forms/types/formBuilder'
 
 interface MockedApi { get: ReturnType<typeof vi.fn> }
 const mocked = apiClient as unknown as MockedApi

apps/app/src/composables/api/__tests__/usePublicFormTimeSlots.spec.ts

@@ -9,7 +9,7 @@ vi.mock('@/lib/axios', () => ({
 
 import { apiClient } from '@/lib/axios'
 import { usePublicFormTimeSlots } from '@/composables/api/usePublicFormTimeSlots'
-import type { PublicFormTimeSlot } from '@form-schema/types/formBuilder'
+import type { PublicFormTimeSlot } from '@/composables/forms/types/formBuilder'
 
 interface MockedApi { get: ReturnType<typeof vi.fn> }
 const mocked = apiClient as unknown as MockedApi

apps/app/src/composables/api/usePublicForm.ts

@@ -9,7 +9,7 @@ import type {
   SaveDraftBody,
   StartDraftBody,
   SubmitBody,
-} from '@form-schema/types/formBuilder'
+} from '@/composables/forms/types/formBuilder'
 
 interface ApiResponse<T> {
   data: T

apps/app/src/composables/api/usePublicFormSections.ts

@@ -1,7 +1,7 @@
 import { useQuery } from '@tanstack/vue-query'
 import type { Ref } from 'vue'
 import { apiClient } from '@/lib/axios'
-import type { PublicFormSectionOption } from '@form-schema/types/formBuilder'
+import type { PublicFormSectionOption } from '@/composables/forms/types/formBuilder'
 
 interface ApiResponse<T> {
   data: T

apps/app/src/composables/api/usePublicFormTimeSlots.ts

@@ -1,7 +1,7 @@
 import { useQuery } from '@tanstack/vue-query'
 import type { Ref } from 'vue'
 import { apiClient } from '@/lib/axios'
-import type { PublicFormTimeSlot } from '@form-schema/types/formBuilder'
+import type { PublicFormTimeSlot } from '@/composables/forms/types/formBuilder'
 
 interface ApiResponse<T> {
   data: T

apps/app/src/composables/useFormDraft.ts

@@ -7,7 +7,7 @@ import {
   useSaveFormDraft,
   useSubmitForm,
 } from '@/composables/api/usePublicForm'
-import type { FormValues, PublicFormSubmission, SaveDraftBody } from '@form-schema/types/formBuilder'
+import type { FormValues, PublicFormSubmission, SaveDraftBody } from '@/composables/forms/types/formBuilder'
 
 /** sessionStorage key for reusing an idempotency key across reloads. */
 export function draftIdempotencyKey(token: string): string {