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/components/TaskDocumentUpload.vue

@@ -50,13 +50,14 @@ import { useTaskDocumentService } from '~/modules/project-management/services/ta
 
 const props = defineProps<{
     taskId?: number
+    clientTicketId?: number
 }>()
 
 const emit = defineEmits<{
     uploaded: []
 }>()
 
-const { upload: uploadFile } = useTaskDocumentService()
+const { upload: uploadFile, uploadForClientTicket } = useTaskDocumentService()
 const toast = useToast()
 const { t } = useI18n()
 
@@ -111,6 +112,8 @@ async function processFiles(files: File[]) {
         try {
             if (props.taskId) {
                 await uploadFile(props.taskId, file)
+            } else if (props.clientTicketId) {
+                await uploadForClientTicket(props.clientTicketId, file)
             }
             state.uploading = false
             state.progress = 100