fix: file manager double browse from v-select init and stale chunks

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/changelog/2026-06-02-proactive-jwt-refresh.md

@@ -63,9 +63,17 @@ if (!_retry && !AUTH_SKIP_REFRESH.has(path) && auth.token && auth.isTokenExpirin
 
 ---
 
+## 追加修复（2026-06-02 续）
+
+- `FilesPage.vue`：`v-select` 在 `onMounted` 赋值 `selectedServer` 时会触发 `@update:model-value` → `onServerChange` 再次 `browse()`；增加 `_initing` 守卫
+- `FilesPage.vue`：`pageReady` 避免首屏短暂显示「请先选择服务器」
+- `FilesPage.vue`：同路径并发 `browse()` 合并为单次 in-flight 请求
+- 部署须执行 `deploy/prune_frontend_assets.py` 清理服务器上残留的旧 hash chunk（否则浏览器可能仍加载旧 `FilesPage-*.js`）
+
 ## 验证方式
 
 1. 登录后等待 access token 接近过期（或手动修改 token exp 为近期时间）
 2. 进入文件管理器浏览目录
 3. 打开 DevTools Network 过滤 `/sync/browse`
 4. 预期：每次进目录只有 **1 条** `/sync/browse` 请求，不再出现 401 后重试的第 2 条
+5. 空目录区不应再闪现「请先选择服务器」（已选服务器时）

frontend/src/pages/FilesPage.vue

@@ -255,7 +255,7 @@
           </div>
         </template>
         <template #no-data>
-          <div v-if="!loading" class="text-center text-medium-emphasis py-8">
+          <div v-if="pageReady && !loading" class="text-center text-medium-emphasis py-8">
             <v-icon size="40" class="mb-2">mdi-folder-open-outline</v-icon>
             <div>{{ emptyHint }}</div>
             <div v-if="selectedServer" class="text-caption mt-2 text-disabled">
@@ -596,7 +596,9 @@ const route = useRoute()
 const router = useRouter()
 
 // ── State ──
-const _mounted = ref(false) // 防止 route watcher 在 onMounted 前触发双重 browse
+const _mounted = ref(false) // route watcher 仅在初始化完成后响应
+const _initing = ref(true) // 阻止 v-select 在 onMounted 赋值时触发 onServerChange 二次 browse
+const pageReady = ref(false) // 避免首屏短暂显示「请先选择服务器」
 const selectedServer = ref<number | null>(null)
 const currentPath = ref(DEFAULT_FILES_ROOT)
 const files = ref<FileEntry[]>([])
@@ -758,6 +760,7 @@ const statusSummary = computed(() => {
 })
 
 const emptyHint = computed(() => {
+  if (!pageReady.value) return '正在加载…'
   if (!selectedServer.value) return '请先选择服务器'
   if (browseError.value) return browseError.value
   if (fileFilter.value.trim()) return '无匹配文件'
@@ -854,13 +857,23 @@ function openInTerminal() {
 
 // 序号保护：防止并发/重试请求导致旧结果覆盖新结果
 let _browseSeq = 0
+let _browseInFlight: Promise<void> | null = null
+let _browseInFlightKey = ''
 
 async function browse() {
   if (!selectedServer.value) return
+  const path = normalizeRemotePath(currentPath.value)
+  const browseKey = `${selectedServer.value}:${path}`
+  if (_browseInFlight && _browseInFlightKey === browseKey) {
+    return _browseInFlight
+  }
+  _browseInFlightKey = browseKey
+
   const seq = ++_browseSeq
   loading.value = true
-  const path = normalizeRemotePath(currentPath.value)
   currentPath.value = path
+
+  _browseInFlight = (async () => {
   try {
     const res = await http.post<BrowseResponse | FileEntry[]>('/sync/browse', {
       server_id: selectedServer.value,
@@ -901,8 +914,15 @@ async function browse() {
       loading.value = false
       syncRouteQuery()
     }
+    if (_browseInFlightKey === browseKey) {
+      _browseInFlight = null
+      _browseInFlightKey = ''
     }
   }
+  })()
+
+  return _browseInFlight
+}
 
 /** 判断 ls 报错是否为「路径不存在」（与权限无关） */
 function isNotFoundError(err: string): boolean {
@@ -939,6 +959,7 @@ function defaultPathForServer(serverId: number | null): string {
 }
 
 function onServerChange() {
+  if (_initing.value) return
   if (selectedServer.value) {
     sessionStorage.setItem(FILES_LAST_SERVER_KEY, String(selectedServer.value))
   }
@@ -1470,16 +1491,22 @@ function formatSize(bytes: number | undefined) {
 
 // ── Init ──
 onMounted(async () => {
+  _initing.value = true
+  try {
     await loadServers()
     if (sessionStorage.getItem(FILES_HINT_DISMISSED_KEY)) {
       accessHintDismissed.value = true
     }
     if (!serverList.value.length) {
       snackbar('暂无可用服务器，请先在「服务器」页添加', 'warning')
+      pageReady.value = true
       return
     }
     const initialId = resolveInitialServerId()
-  if (initialId == null) return
+    if (initialId == null) {
+      pageReady.value = true
+      return
+    }
     selectedServer.value = initialId
     const qPath = route.query.path
     currentPath.value =
@@ -1487,24 +1514,44 @@ onMounted(async () => {
         ? normalizeRemotePath(qPath)
         : defaultPathForServer(initialId)
     await refreshFilesCapability()
-  browse()
+    await browse()
+    pageReady.value = true
     _mounted.value = true
+  } finally {
+    _initing.value = false
+  }
 })
 
+function pathFromRouteQuery(): string {
+  const qPath = route.query.path
+  if (typeof qPath === 'string' && qPath.trim()) {
+    return normalizeRemotePath(qPath)
+  }
+  return defaultPathForServer(selectedServer.value)
+}
+
 watch(
   () => route.query.server_id,
   (id) => {
-    if (!_mounted.value) return // 初始化未完成时跳过，避免与 onMounted 双重 browse
+    if (!_mounted.value) return
     if (id && Number(id) !== selectedServer.value) {
       selectedServer.value = Number(id)
-      const qPath = route.query.path
+      currentPath.value = pathFromRouteQuery()
-      currentPath.value =
-        typeof qPath === 'string' && qPath
-          ? normalizeRemotePath(qPath)
-          : defaultPathForServer(Number(id))
       lastReadDeniedPath.value = null
       void refreshFilesCapability()
-      browse()
+      void browse()
+    }
+  },
+)
+
+watch(
+  () => route.query.path,
+  () => {
+    if (!_mounted.value || !selectedServer.value) return
+    const next = pathFromRouteQuery()
+    if (next !== normalizeRemotePath(currentPath.value)) {
+      currentPath.value = next
+      void browse()
     }
   },
 )

frontend/src/stores/auth.ts

@@ -10,7 +10,10 @@ export { TotpRequiredError }
 /** 从 JWT 不验签地解码 exp 字段（秒）。失败返回 0。 */
 function decodeJwtExp(jwt: string): number {
   try {
-    const part = jwt.split('.')[1]
+    let part = jwt.split('.')[1]
+    if (!part) return 0
+    const pad = part.length % 4
+    if (pad) part += '='.repeat(4 - pad)
     const json = atob(part.replace(/-/g, '+').replace(/_/g, '/'))
     const obj = JSON.parse(json) as { exp?: number }
     return typeof obj.exp === 'number' ? obj.exp : 0