feat(editor): add auto-save with 60s countdown and offline detection

- 60s countdown timer, auto-save every 60s
- Offline detection: pause countdown, show red warning
- Auto-save: edit mode via PUT, create mode via localStorage draft
- beforeunload + onBeforeRouteLeave double protection for unsaved changes
- Draft restore from localStorage on new article mount

src/views/admin/ArticleEditorView.vue

@@ -1,6 +1,6 @@
 <script setup lang="ts">
-import { ref, computed, onMounted } from 'vue'
-import { useRoute, useRouter } from 'vue-router'
+import { ref, computed, onMounted, onBeforeUnmount, watch } from 'vue'
+import { useRoute, useRouter, onBeforeRouteLeave } from 'vue-router'
 import { articleAdminApi, articleApi, tagApi, mediaApi } from '@/api/client'
 import type { ArticleDetail, Tag } from '@/generated/api'
 import QuillEditor from '@/components/QuillEditor.vue'
@@ -21,6 +21,149 @@ const saving = ref(false)
 const error = ref<string | null>(null)
 const uploading = ref(false)
 
+// ========== 自动保存 ==========
+const countdown = ref(60)
+const isOnline = ref(navigator.onLine)
+const isAutoSaving = ref(false)
+const lastSavedContent = ref('')
+const autoSaveMessage = ref('')
+const hasUnsavedChanges = ref(false)
+let countdownTimer: ReturnType<typeof setInterval> | null = null
+
+function updateOnlineStatus() {
+  isOnline.value = navigator.onLine
+  if (!isOnline.value) {
+    autoSaveMessage.value = '已离线，请妥善保存'
+  } else {
+    autoSaveMessage.value = ''
+  }
+}
+
+async function autoSave() {
+  if (!isOnline.value) {
+    autoSaveMessage.value = '已离线，请妥善保存'
+    return
+  }
+  if (content.value === lastSavedContent.value) {
+    countdown.value = 60
+    return
+  }
+  isAutoSaving.value = true
+  try {
+    if (isEdit.value) {
+      const id = Number(route.params.id)
+      await articleAdminApi.apiAdminArticlesIdPut(id, {
+        title: title.value.trim(),
+        summary: summary.value.trim() || undefined,
+        content: content.value,
+        coverImage: coverImage.value || undefined,
+        tagIds: selectedTagIds.value
+      })
+    } else {
+      localStorage.setItem('article_draft', JSON.stringify({
+        title: title.value,
+        content: content.value,
+        summary: summary.value,
+        coverImage: coverImage.value,
+        tagIds: selectedTagIds.value,
+        savedAt: new Date().toISOString()
+      }))
+    }
+    lastSavedContent.value = content.value
+    hasUnsavedChanges.value = false
+    autoSaveMessage.value = '已自动保存'
+    setTimeout(() => { autoSaveMessage.value = '' }, 2000)
+    countdown.value = 60
+  } catch {
+    autoSaveMessage.value = '保存失败，请检查网络'
+  } finally {
+    isAutoSaving.value = false
+  }
+}
+
+function startCountdown() {
+  countdownTimer = setInterval(() => {
+    if (!isOnline.value) return
+    countdown.value--
+    if (countdown.value <= 0) {
+      autoSave()
+    }
+  }, 1000)
+}
+
+watch(content, (val) => {
+  hasUnsavedChanges.value = val !== lastSavedContent.value
+})
+
+watch(title, () => { hasUnsavedChanges.value = true })
+
+function handleBeforeUnload(e: BeforeUnloadEvent) {
+  if (hasUnsavedChanges.value) {
+    e.preventDefault()
+    e.returnValue = '您有未保存的内容，确定要离开吗？'
+    return e.returnValue
+  }
+}
+
+function restoreDraft() {
+  if (isEdit.value) return
+  const draft = localStorage.getItem('article_draft')
+  if (!draft) return
+  try {
+    const parsed = JSON.parse(draft)
+    if (parsed.title || parsed.content) {
+      title.value = parsed.title || ''
+      content.value = parsed.content || ''
+      summary.value = parsed.summary || ''
+      coverImage.value = parsed.coverImage || ''
+      selectedTagIds.value = parsed.tagIds || []
+      lastSavedContent.value = content.value
+      hasUnsavedChanges.value = false
+    }
+  } catch {
+    localStorage.removeItem('article_draft')
+  }
+}
+
+// ========== 手动保存（发布） ==========
+async function onSubmit() {
+  if (!title.value.trim() || !content.value.trim()) {
+    error.value = '标题和内容为必填项'
+    return
+  }
+  saving.value = true
+  error.value = null
+  try {
+    if (isEdit.value) {
+      const id = Number(route.params.id)
+      await articleAdminApi.apiAdminArticlesIdPut(id, {
+        title: title.value.trim(),
+        summary: summary.value.trim() || undefined,
+        content: content.value,
+        coverImage: coverImage.value || undefined,
+        tagIds: selectedTagIds.value
+      })
+    } else {
+      await articleAdminApi.apiAdminArticlesPost({
+        title: title.value.trim(),
+        summary: summary.value.trim() || undefined,
+        content: content.value,
+        coverImage: coverImage.value || undefined,
+        tagIds: selectedTagIds.value
+      })
+      localStorage.removeItem('article_draft')
+    }
+    lastSavedContent.value = content.value
+    hasUnsavedChanges.value = false
+    router.push({ name: 'AdminArticleList' })
+  } catch (e) {
+    console.error(e)
+    error.value = '保存失败'
+  } finally {
+    saving.value = false
+  }
+}
+
 async function loadTags() {
   try {
     const resp = await tagApi.apiTagsGet()
@@ -51,6 +194,8 @@ async function loadArticle() {
       content.value = detail.content
       coverImage.value = detail.coverImage ?? ''
       selectedTagIds.value = matchTagIds(detail)
+      lastSavedContent.value = detail.content
+      hasUnsavedChanges.value = false
     }
   } catch (e) {
     console.error(e)
@@ -94,44 +239,38 @@ async function removeCover() {
   coverImage.value = ''
 }
 
-async function onSubmit() {
-  if (!title.value.trim() || !content.value.trim()) {
-    error.value = '标题和内容为必填项'
-    return
-  }
-  saving.value = true
-  error.value = null
-  try {
-    if (isEdit.value) {
-      const id = Number(route.params.id)
-      await articleAdminApi.apiAdminArticlesIdPut(id, {
-        title: title.value.trim(),
-        summary: summary.value.trim() || undefined,
-        content: content.value,
-        coverImage: coverImage.value || undefined,
-        tagIds: selectedTagIds.value
-      })
+// ========== 路由离开确认 ==========
+onBeforeRouteLeave((to, _from, next) => {
+  if (hasUnsavedChanges.value) {
+    const ok = window.confirm('您有未保存的内容，确定要离开吗？')
+    if (ok) {
+      next()
     } else {
-      await articleAdminApi.apiAdminArticlesPost({
-        title: title.value.trim(),
-        summary: summary.value.trim() || undefined,
-        content: content.value,
-        coverImage: coverImage.value || undefined,
-        tagIds: selectedTagIds.value
-      })
-    }
-    router.push({ name: 'AdminArticleList' })
-  } catch (e) {
-    console.error(e)
-    error.value = '保存失败'
-  } finally {
-    saving.value = false
+      next(false)
     }
+  } else {
+    next()
   }
+})
 
 onMounted(() => {
+  window.addEventListener('online', updateOnlineStatus)
+  window.addEventListener('offline', updateOnlineStatus)
+  window.addEventListener('beforeunload', handleBeforeUnload)
+  startCountdown()
   loadTags()
-  if (isEdit.value) loadArticle()
+  if (isEdit.value) {
+    loadArticle()
+  } else {
+    restoreDraft()
+  }
+})
+
+onBeforeUnmount(() => {
+  if (countdownTimer) clearInterval(countdownTimer)
+  window.removeEventListener('online', updateOnlineStatus)
+  window.removeEventListener('offline', updateOnlineStatus)
+  window.removeEventListener('beforeunload', handleBeforeUnload)
 })
 </script>
 
@@ -140,6 +279,21 @@ onMounted(() => {
   <div v-else class="editor-wrapper">
     <p v-if="error" class="error-text">{{ error }}</p>
 
+    <div class="editor-header">
+      <div class="auto-save-status">
+        <span v-if="isOnline && !autoSaveMessage && !isAutoSaving" class="countdown">
+          {{ countdown }}s 后自动保存
+        </span>
+        <span v-if="isAutoSaving" class="saving">保存中...</span>
+        <span
+          v-if="autoSaveMessage"
+          :class="['save-message', autoSaveMessage.includes('离线') || autoSaveMessage.includes('失败') ? 'error' : 'success']"
+        >
+          {{ autoSaveMessage }}
+        </span>
+      </div>
+    </div>
+
     <div class="editor-layout">
       <div class="editor-main">
         <input
@@ -208,6 +362,38 @@ onMounted(() => {
   max-width: 1200px;
 }
 
+.editor-header {
+  display: flex;
+  justify-content: flex-end;
+  align-items: center;
+  margin-bottom: 16px;
+}
+
+.auto-save-status {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  font-size: 13px;
+  color: var(--ac-text-secondary);
+}
+
+.countdown {
+  font-variant-numeric: tabular-nums;
+}
+
+.saving {
+  color: var(--ac-primary-ink);
+}
+
+.save-message.success {
+  color: var(--ac-success-ink);
+}
+
+.save-message.error {
+  color: var(--ac-danger-ink);
+  font-weight: 500;
+}
+
 .error-text {
   color: var(--ac-danger);
   margin-bottom: 12px;