feat: 统一去重检测，所有保存路径禁止同名配方

提取 checkDupName 函数统一所有保存路径的重名检测：
- 同名同配方：提示已存在，不保存
- 同名不同配方：展示差异，强制改名，循环检测直到不重名
- 覆盖：单条保存、全部保存、共享到公共库

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

frontend/src/views/RecipeManager.vue

@@ -981,6 +981,44 @@ function toggleFormTag(tag) {
   else formTags.value.push(tag)
 }
 
+/**
+ * Check name against public + personal recipes.
+ * Same name + same content → toast and return false.
+ * Same name + different content → show diff, prompt rename, loop until unique.
+ * Returns final name or false if cancelled.
+ */
+async function checkDupName(name, ings) {
+  let currentName = name
+  while (true) {
+    const pubDup = recipeStore.recipes.find(r => r.name === currentName)
+    const diaryDup = diaryStore.userDiary.find(d => d.name === currentName)
+    const dup = pubDup || diaryDup
+    if (!dup) return currentName
+
+    const dupIngs = (dup.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
+    const myIngs = ings.filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
+    const identical = dupIngs.length === myIngs.length && dupIngs.every((d, i) => d.oil === myIngs[i].oil && d.drops === myIngs[i].drops)
+    const where = pubDup ? '公共配方库' : '我的配方'
+
+    if (identical) {
+      ui.showToast(`${where}中已有一模一样的配方「${currentName}」`)
+      return false
+    }
+
+    const existIngs = dupIngs.map(i => `${i.oil}${i.drops}滴`).join('、')
+    const newIngs = myIngs.map(i => `${i.oil}${i.drops}滴`).join('、')
+    const ok = await showConfirm(
+      `${where}中已有同名配方「${currentName}」，内容不同：\n\n已有：${existIngs}\n新的：${newIngs}\n\n请改名后保存`,
+      { okText: '改名', cancelText: '取消' }
+    )
+    if (!ok) return false
+    const newName = await showPrompt('请输入新名称：', currentName)
+    if (!newName || !newName.trim()) return false
+    currentName = newName.trim()
+    // Loop back to check the new name
+  }
+}
+
 async function saveCurrentRecipe() {
   if (formVolume.value === 'custom' && !formCustomVolume.value) {
     ui.showToast('请输入自定义容量')
@@ -1010,33 +1048,11 @@ async function saveCurrentRecipe() {
 
   // Dedup check for new recipes (not editing)
   if (!editingRecipe.value) {
-    const name = formName.value.trim()
-    // Check public library
-    const pubDup = recipeStore.recipes.find(r => r.name === name)
-    // Check personal diary
-    const diaryDup = diaryStore.userDiary.find(d => d.name === name)
-    const dup = pubDup || diaryDup
-    if (dup) {
-      const dupIngs = (dup.ingredients || []).filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
-      const myIngs = cleanIngs.filter(i => i.oil).sort((a, b) => a.oil.localeCompare(b.oil))
-      const identical = dupIngs.length === myIngs.length && dupIngs.every((ing, i) => ing.oil === myIngs[i].oil && ing.drops === myIngs[i].drops)
-      const where = pubDup ? '公共配方库' : '我的配方'
-      if (identical) {
-        ui.showToast(`${where}中已有一模一样的配方「${name}」`)
-        return
-      }
-      // Show difference
-      const existIngs = dupIngs.map(i => `${i.oil}${i.drops}滴`).join('、')
-      const newIngs = myIngs.map(i => `${i.oil}${i.drops}滴`).join('、')
-      const ok = await showConfirm(
-        `${where}中已有同名配方「${name}」，内容不同：\n\n已有：${existIngs}\n新的：${newIngs}\n\n是否改名后保存？`,
-        { okText: '改名', cancelText: '取消' }
-      )
-      if (!ok) return
-      const newName = await showPrompt('请输入新名称：', name)
-      if (!newName || !newName.trim()) return
-      formName.value = newName.trim()
-      diaryPayload.name = newName.trim()
+    const result = await checkDupName(diaryPayload.name, cleanIngs)
+    if (result === false) return  // cancelled
+    if (result !== diaryPayload.name) {
+      formName.value = result
+      diaryPayload.name = result
     }
   }
 
@@ -1129,23 +1145,31 @@ async function saveParsedRecipe(index) {
 async function saveAllParsed() {
   // Sync current form edits back first
   syncFormToParsed()
-  let saved = 0
-  for (let i = parsedRecipes.value.length - 1; i >= 0; i--) {
+  const toPublic = auth.canManage && await showConfirm('全部保存到哪里？', { okText: '公共配方库', cancelText: '个人配方' })
+  let saved = 0, skipped = 0
+  for (let i = 0; i < parsedRecipes.value.length; i++) {
     const r = parsedRecipes.value[i]
     if (!r.name.trim() || r.ingredients.length === 0) continue
+    const ings = r.ingredients.map(ing => ({ oil: ing.oil, drops: ing.drops }))
+    const finalName = await checkDupName(r.name.trim(), ings)
+    if (finalName === false) { skipped++; continue }
     try {
-      await diaryStore.createDiary({
-        name: r.name.trim(),
-        ingredients: r.ingredients.map(i => ({ oil: i.oil, drops: i.drops })),
+      if (toPublic) {
+        await recipeStore.saveRecipe({
+          name: finalName,
+          ingredients: ings.map(ing => ({ oil_name: ing.oil, drops: ing.drops })),
           note: '',
           tags: [],
         })
+      } else {
+        await diaryStore.createDiary({ name: finalName, ingredients: ings, note: '', tags: [] })
+      }
       saved++
     } catch {}
   }
   parsedRecipes.value = []
   parsedCurrentIndex.value = -1
-  ui.showToast(`已保存 ${saved} 条配方到我的配方`)
+  ui.showToast(`已保存 ${saved} 条配方到${toPublic ? '公共配方库' : '我的配方'}`)
   closeOverlay()
 }
 
@@ -1424,28 +1448,10 @@ 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 — show details
-    const existIngs = pIngs.map(i => `${i.oil}${i.drops}滴`).join('、')
-    const newIngs = dIngs.map(i => `${i.oil}${i.drops}滴`).join('、')
-    const action = await showConfirm(
-      `公共配方库中已有同名配方「${diary.name}」，内容不同：\n\n已有：${existIngs}\n新的：${newIngs}\n\n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 ings = (diary.ingredients || []).map(i => ({ oil: i.oil, drops: i.drops }))
+  const result = await checkDupName(diary.name, ings)
+  if (result === false) return
+  if (result !== diary.name) diary = { ...diary, name: result }
 
   const ok = await showConfirm(`将「${diary.name}」共享到公共配方库？`)
   if (!ok) return