Enhance user search functionality to support ID and keyword searches.…

… Updated query conditions to allow searching by user ID alongside username, email, and display name. Improved handling of numeric and string keywords in search queries.

model/user.go

@@ -134,18 +134,23 @@ func SearchUsers(keyword string, group string, startIdx int, num int) ([]*User,
 	// 构建基础查询
 	query := tx.Unscoped().Model(&User{})
 
+	// 构建搜索条件
+	likeCondition := "username LIKE ? OR email LIKE ? OR display_name LIKE ?"
+
 	// 尝试将关键字转换为整数ID
 	keywordInt, err := strconv.Atoi(keyword)
 	if err == nil {
-		// 如果转换成功，按照ID和可选的组别搜索用户
+		// 如果是数字，同时搜索ID和其他字段
+		likeCondition = "id = ? OR " + likeCondition
 		if group != "" {
-			query = query.Where("id = ? AND "+groupCol+" = ?", keywordInt, group)
+			query = query.Where("("+likeCondition+") AND "+groupCol+" = ?",
+				keywordInt, "%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%", group)
 		} else {
-			query = query.Where("id = ?", keywordInt)
+			query = query.Where(likeCondition,
+				keywordInt, "%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%")
 		}
 	} else {
-		// 如果不是ID搜索，则使用模糊匹配
-		likeCondition := "username LIKE ? OR email LIKE ? OR display_name LIKE ?"
+		// 非数字关键字，只搜索字符串字段
 		if group != "" {
 			query = query.Where("("+likeCondition+") AND "+groupCol+" = ?",
 				"%"+keyword+"%", "%"+keyword+"%", "%"+keyword+"%", group)