feat(t03): improve performance and UX

- add category/tag caching and optimistic updates

- add stats dashboard aggregation and batched tracking

- add undo delete snackbar and group read-only view mode

- improve app-ready timeout handling and refresh guards

client/src/pages/profile-edit/index.vue

@@ -60,7 +60,7 @@ const uploading = ref(false)
 const saving = ref(false)
 
 onMounted(async () => {
-  await waitForReady()
+  try { await waitForReady() } catch { /* 超时，继续加载 */ }
   formNickname.value = userStore.nickname
   formSlogan.value = userStore.slogan
   previewUrl.value = userStore.avatarUrl