feat: 高级编辑共享跳过审核 + 去重 + 通知 + 已分享状态

共享流程:
- 高级编辑/管理员共享直接进公共库（跳过审核）
- 普通用户共享仍需管理员审核
- 高级编辑共享后通知管理员"已添加"（非待审核）

去重检测:
- 同名同内容：提示"已有一模一样的"
- 同名不同内容：提示改名后共享

状态显示:
- 共享后对比公共库内容，相同则显示"已共享"
- 修改内容后"已共享"消失，可重新共享

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

frontend/src/views/RecipeManager.vue

@@ -1199,22 +1199,21 @@ function openRecipeDetail(recipe) {
   if (idx >= 0) previewRecipeIndex.value = idx
 }
 
+function diaryMatchesPublic(d) {
+  const pub = recipeStore.recipes.find(r => r.name === d.name)
+  if (!pub) return false
+  const dIngs = (d.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
+  const pIngs = (pub.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
+  return dIngs.length === pIngs.length && dIngs.every((ing, i) => ing.oil === pIngs[i].oil && ing.drops === pIngs[i].drops)
+}
+
 function getDiaryShareStatus(d) {
-  // Check pending first (exact name match in public library owned by user)
+  // Check pending (owned by user in public library, not yet adopted)
   if (sharedCount.value.pendingNames.includes(d.name)) return 'pending'
-  // Check adopted — but if diary content was modified, allow re-sharing
-  if (sharedCount.value.adoptedNames.includes(d.name)) {
-    // Compare with the public recipe to see if content changed
-    const pub = recipeStore.recipes.find(r => r.name === d.name)
-    if (pub) {
-      const dIngs = (d.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
-      const pIngs = (pub.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
-      const same = dIngs.length === pIngs.length && dIngs.every((ing, i) => ing.oil === pIngs[i].oil && ing.drops === pIngs[i].drops)
-      if (same) return 'shared'
-    }
-    // Content changed or public recipe not found — can re-share
-    return null
-  }
+  // Check if public library has same recipe with same content
+  if (diaryMatchesPublic(d)) return 'shared'
+  // Check adopted names from audit log
+  if (sharedCount.value.adoptedNames.includes(d.name) && diaryMatchesPublic(d)) return 'shared'
   return null
 }
 
@@ -1244,6 +1243,27 @@ async function recommendApprove(recipe) {
 }
 
 async function shareDiaryToPublic(diary) {
+  // Check for duplicates in public library
+  const dup = recipeStore.recipes.find(r => r.name === diary.name)
+  if (dup) {
+    const dIngs = (diary.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
+    const pIngs = (dup.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
+    const identical = dIngs.length === pIngs.length && dIngs.every((ing, i) => ing.oil === pIngs[i].oil && ing.drops === pIngs[i].drops)
+    if (identical) {
+      ui.showToast('公共配方库中已有一模一样的配方「' + diary.name + '」')
+      return
+    }
+    // Same name, different content
+    const action = await showConfirm(
+      `公共配方库中已有同名配方「${diary.name}」但内容不同，是否改名后共享？`,
+      { okText: '改名', cancelText: '取消' }
+    )
+    if (!action) return
+    const newName = await showPrompt('请输入新名称：', diary.name)
+    if (!newName || !newName.trim()) return
+    diary = { ...diary, name: newName.trim() }
+  }
+
   const ok = await showConfirm(`将「${diary.name}」共享到公共配方库？`)
   if (!ok) return
   try {
@@ -1257,7 +1277,7 @@ async function shareDiaryToPublic(diary) {
       }),
     })
     if (res.ok) {
-      if (auth.isAdmin) {
+      if (auth.isAdmin || auth.canManage) {
         ui.showToast('已共享到公共配方库')
       } else {
         ui.showToast('已提交，等待管理员审核')