feat(client-portal) : portal front + client account admin (phases 1-2 front)

LST-69 (3.2) front. Client portal UI on the phase-1 backend.

- New frontend/modules/client-portal/ layer: /portal (project cards from the
  client's allowedProjects via /me), /portal/projects/[id] (tickets list,
  detail modal, create modal with document upload), client-tickets service +
  DTO, CT-XXX formatting.
- Front tenancy: auth.global.ts redirects a pure ROLE_CLIENT to /portal and
  blocks internal routes; portal pages open to any authenticated user.
- Admin: UserDrawer manages client accounts (ROLE_CLIENT + client +
  allowedProjects); new "Tickets client" admin tab (list, filters, status
  change with required comment on reject, detail modal).
- Kanban/my-tasks: client-ticket icon + tooltip when task.clientTicket is set
  (data via task:read, no extra call). TaskDocument upload generalized with a
  clientTicketId prop. getContent uses native fetch (text response).
- i18n portal/clientTicket keys; sidebar /portal item (module client-portal).

nuxt build passes; /portal routes present, existing routes intact.

frontend/modules/project-management/services/task-documents.ts

@@ -15,6 +15,13 @@ export function useTaskDocumentService() {
         return extractHydraMembers(data)
     }
 
+    async function getByClientTicket(clientTicketId: number): Promise<TaskDocument[]> {
+        const data = await api.get<HydraCollection<TaskDocument>>('/task_documents', {
+            clientTicket: `/api/client_tickets/${clientTicketId}`,
+        })
+        return extractHydraMembers(data)
+    }
+
     async function uploadWithRelation(relationField: string, relationIri: string, file: File): Promise<TaskDocument> {
         const formData = new FormData()
         formData.append('file', file)
@@ -31,6 +38,10 @@ export function useTaskDocumentService() {
         return uploadWithRelation('task', `/api/tasks/${taskId}`, file)
     }
 
+    async function uploadForClientTicket(clientTicketId: number, file: File): Promise<TaskDocument> {
+        return uploadWithRelation('clientTicket', `/api/client_tickets/${clientTicketId}`, file)
+    }
+
     async function linkShare(taskId: number, sharePath: string): Promise<TaskDocument> {
         return $fetch<TaskDocument>(`${baseURL}/task_documents`, {
             method: 'POST',
@@ -51,11 +62,12 @@ export function useTaskDocumentService() {
     }
 
     async function getContent(id: number): Promise<string> {
-        return $fetch<string>(`${baseURL}/task_documents/${id}/download`, {
+        const response = await fetch(`${baseURL}/task_documents/${id}/download`, {
             credentials: 'include',
-            responseType: 'text',
         })
+
+        return response.text()
     }
 
-    return { getByTask, upload, linkShare, remove, getDownloadUrl, getContent }
+    return { getByTask, getByClientTicket, upload, uploadForClientTicket, linkShare, remove, getDownloadUrl, getContent }
 }