fix: 贡献统计去重 + 已共享内容变更可重新共享

贡献统计:
- 按配方名去重（拒绝后重新申请不重复计数）
- 已采纳+待审核+被拒绝的唯一配方名总数

已共享状态:
- 已共享配方修改内容后，对比公共库版本
- 内容不同时"已共享"消失，可重新共享
- 内容相同时保持"已共享"

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

frontend/src/views/RecipeManager.vue

@@ -1181,8 +1181,21 @@ function openRecipeDetail(recipe) {
 }
 
 function getDiaryShareStatus(d) {
-  if (sharedCount.value.adoptedNames.includes(d.name)) return 'shared'
+  // Check pending first (exact name match in public library owned by user)
   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
+  }
   return null
 }