From be8ce04334a972094ed65baa0ef61815277cdb0b Mon Sep 17 00:00:00 2001
From: Victor_Jay <ovoex.cn@gmail.com>
Date: Wed, 3 Jun 2026 00:55:51 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E4=BF=AE=E5=A4=8D@=E6=8F=90=E5=8F=8Auid?=
 =?UTF-8?q?=E5=A7=8B=E7=BB=88=E4=B8=BA0=E7=9A=84BUG=20+=20=E7=A9=BA@?=
 =?UTF-8?q?=E6=8F=90=E7=A4=BA=E4=BC=98=E5=8C=96?=
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- SearchUsersByLevel SQL id列别名改为uid，修复GORM字段名映射导致uid=0
- @空输入时悬浮窗显示'输入以查找用户'而非空白
- 清理历史脏数据(uid=0的mention记录)
---
 internal/repository/comment_mention_repo.go   |  2 +-
 .../MetaLab-2026/static/js/post-comments.js   | 21 +++++++++++++++++--
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/internal/repository/comment_mention_repo.go b/internal/repository/comment_mention_repo.go
index d7f63b5..647ba0a 100644
--- a/internal/repository/comment_mention_repo.go
+++ b/internal/repository/comment_mention_repo.go
@@ -80,7 +80,7 @@ func (r *CommentRepo) SearchUsersByLevel(keyword string, minLevel int, limit int
 	threshold := model.LevelThresholds[minLevel]
 
 	err := r.db.Table("users").
-		Select("id, username, avatar, exp").
+		Select("id AS uid, username, avatar, exp").
 		Where("username LIKE ? AND exp >= ? AND deleted_at IS NULL", "%"+keyword+"%", threshold).
 		Order("exp DESC").
 		Limit(limit).
diff --git a/templates/MetaLab-2026/static/js/post-comments.js b/templates/MetaLab-2026/static/js/post-comments.js
index d013c84..26809bd 100644
--- a/templates/MetaLab-2026/static/js/post-comments.js
+++ b/templates/MetaLab-2026/static/js/post-comments.js
@@ -296,9 +296,9 @@
 
             clearTimeout(searchTimer);
 
-            // 仅输入 @ 时，显示空白下拉
+            // 仅输入 @ 时，显示提示
             if (query.length === 0) {
-                showMention(input, [], '');
+                showEmptyHint(input);
                 return;
             }
 
@@ -366,6 +366,23 @@
         dropdown.style.left = Math.min(pos.left, window.innerWidth - 230) + 'px';
     }
 
+    function showEmptyHint(input) {
+        var dropdown = mentionDropdown;
+        dropdown.innerHTML = '';
+        var hint = document.createElement('div');
+        hint.className = 'mention-no-result';
+        hint.textContent = '输入以查找用户';
+        dropdown.appendChild(hint);
+
+        var cursorIdx = input.selectionStart;
+        var pos = getCursorPixelPos(input, cursorIdx);
+        dropdown.style.display = 'block';
+        dropdown.style.width = '220px';
+        var dropHeight = dropdown.offsetHeight || 36;
+        dropdown.style.top = (pos.top - dropHeight - 4 + window.scrollY) + 'px';
+        dropdown.style.left = Math.min(pos.left, window.innerWidth - 230) + 'px';
+    }
+
     function hideMention() {
         mentionDropdown.style.display = 'none';
         mentionDropdown.innerHTML = '';