feat(avatar) : replace initials with UserAvatar component everywhere

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

frontend/pages/projects/[id]/archives.vue

@@ -46,13 +46,11 @@
                         >
                             {{ task.group.title }}
                         </span>
-                        <span
+                        <UserAvatar
                             v-if="task.assignee"
-                            class="flex h-5 w-5 items-center justify-center rounded-full bg-primary-500 text-[10px] font-bold text-white"
-                            :title="task.assignee.username"
-                        >
-                            {{ task.assignee.username.substring(0, 2).toUpperCase() }}
-                        </span>
+                            :user="task.assignee"
+                            size="xs"
+                        />
                     </div>
                 </div>
             </div>
@@ -130,7 +128,7 @@ const filteredTasks = computed(() => {
 async function loadData() {
     const [p, t, s, e, pr, ty, g, u] = await Promise.all([
         projectService.getById(projectId.value),
-        taskService.getByProjectArchived(projectId.value),
+        taskService.getByProject(projectId.value, true),
         statusService.getAll(),
         effortService.getAll(),
         priorityService.getAll(),