feat(ui) : move client tickets to project sub-page and fix profile layout for clients

- Move client tickets from admin tab to /projects/[id]/client-tickets page
- Add "Tickets client" sidebar link under project navigation
- Fix profile page using portal layout for ROLE_CLIENT users
- Bump version to v0.3.4

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/pages/admin.vue

@@ -27,7 +27,6 @@
             <AdminPriorityTab v-if="activeTab === 'priorities'" />
             <AdminTagTab v-if="activeTab === 'tags'" />
             <AdminUserTab v-if="activeTab === 'users'" />
-            <AdminClientTicketTab v-if="activeTab === 'client-tickets'" />
             <AdminGiteaTab v-if="activeTab === 'gitea'" />
             <AdminBookStackTab v-if="activeTab === 'bookstack'" />
         </div>
@@ -45,7 +44,6 @@ const tabs = [
     { key: 'priorities', label: 'Priorités' },
     { key: 'tags', label: 'Tags' },
     { key: 'users', label: 'Utilisateurs' },
-    { key: 'client-tickets', label: 'Tickets client' },
     { key: 'gitea', label: 'Gitea' },
     { key: 'bookstack', label: 'BookStack' },
 ] as const