feat(publish): unify image fetch failure message across adapters

Consolidate per-platform cover/image fetch failure prompts into a single
PUBLISH_IMAGE_FETCH_FAILED_MESSAGE constant shared by baijiahao, bilibili,
dongchedi, qiehao, smzdm, and zol adapters, and generalize the normalizer
to match any *_image_fetch_failed / *_cover_fetch_failed code. Also split
desktop publish list loading into initial vs manual-refresh states so the
refresh button no longer blanks the table, and fix admin-web active-task
detection to cover all pending statuses.

apps/desktop-client/src/renderer/views/PublishManagementView.vue

@@ -79,7 +79,7 @@ function platformShortName(platform: string): string {
 function statusLabel(status: DesktopTaskInfo['status']): string {
   const map: Record<DesktopTaskInfo['status'], string> = {
     queued: '等待发布',
-    in_progress: '正在发送',
+    in_progress: '正在发布',
     succeeded: '发送成功',
     failed: '发送失败',
     unknown: '发送失败',
@@ -324,7 +324,8 @@ const taskPage = ref<DesktopPublishTaskListResponse | null>(null)
 const currentPage = ref(1)
 const searchTitle = ref('')
 const appliedTitle = ref('')
-const loading = ref(false)
+const initialLoading = ref(false)
+const refreshing = ref(false)
 const error = ref<string | null>(null)
 const consolePendingTaskId = ref<string | null>(null)
 const copiedErrorTaskId = ref<string | null>(null)
@@ -347,8 +348,17 @@ function notifyActionError(description: string) {
   })
 }
 
-async function refreshTasks(page = currentPage.value) {
-  loading.value = true
+async function refreshTasks(
+  page = currentPage.value,
+  options: { initial?: boolean; manual?: boolean } = {},
+) {
+  const showInitialLoading = Boolean(options.initial && taskPage.value === null)
+  if (showInitialLoading) {
+    initialLoading.value = true
+  }
+  if (options.manual) {
+    refreshing.value = true
+  }
   error.value = null
 
   try {
@@ -361,7 +371,7 @@ async function refreshTasks(page = currentPage.value) {
     const lastPage = response.total > 0 ? Math.ceil(response.total / PAGE_SIZE) : 1
     if (response.total > 0 && page > lastPage) {
       currentPage.value = lastPage
-      await refreshTasks(lastPage)
+      await refreshTasks(lastPage, options)
       return
     }
 
@@ -374,10 +384,19 @@ async function refreshTasks(page = currentPage.value) {
       stopActiveTaskPolling()
     }
   } finally {
-    loading.value = false
+    if (showInitialLoading) {
+      initialLoading.value = false
+    }
+    if (options.manual) {
+      refreshing.value = false
+    }
   }
 }
 
+function refreshTasksManually() {
+  void refreshTasks(currentPage.value, { manual: true })
+}
+
 function startActiveTaskPolling() {
   if (refreshTimer) {
     return
@@ -554,7 +573,7 @@ watch(searchTitle, (value) => {
 
 onMounted(() => {
   bindPublishLeaseListener()
-  void refreshTasks()
+  void refreshTasks(currentPage.value, { initial: true })
 })
 
 onUnmounted(() => {
@@ -661,8 +680,8 @@ const tableScroll = { x: 1080 } as const
             type="primary"
             ghost
             class="modern-btn"
-            :loading="loading"
-            @click="refreshTasks()"
+            :loading="refreshing"
+            @click="refreshTasksManually"
           >
             <template #icon><ReloadOutlined /></template>
             刷新状态
@@ -722,7 +741,7 @@ const tableScroll = { x: 1080 } as const
           :columns="tableColumns"
           :data-source="publishTasks"
           :pagination="false"
-          :loading="loading"
+          :loading="initialLoading"
           :scroll="tableScroll"
           :row-class-name="rowClassName"
         >