提交修改，后台管理页面bug修复，已经发布后台管理界面V1.0版本

WxCheckMvc/Controllers/AdminController.cs

@@ -190,6 +190,80 @@ namespace WxCheckMvc.Controllers
                 }
             }
         }
+
+        [HttpGet]
+        public async Task<IActionResult> QueryStats()
+        {
+            try
+            {
+                if (_connection.State != ConnectionState.Open)
+                {
+                    await _connection.OpenAsync();
+                }
+
+                // 1) 活跃用户：最近 7 天登录（UpdateTime）且 UserKey/PhoneNumber 不为空
+                long activeUsers;
+                using (MySqlCommand cmd = new(@"
+                    SELECT COUNT(1)
+                    FROM xcx_users
+                    WHERE UpdateTime >= DATE_SUB(NOW(), INTERVAL 7 DAY)
+                      AND UserKey IS NOT NULL AND UserKey <> ''
+                      AND PhoneNumber IS NOT NULL AND PhoneNumber <> ''", _connection))
+                {
+                    activeUsers = Convert.ToInt64(await cmd.ExecuteScalarAsync());
+                }
+
+                // 2) 总会话记录数
+                long totalConversations;
+                using (MySqlCommand cmd = new("SELECT COUNT(1) FROM xcx_conversation", _connection))
+                {
+                    totalConversations = Convert.ToInt64(await cmd.ExecuteScalarAsync());
+                }
+
+                // 3) 今日新增会话记录（CreateTime 在今天内）
+                long todayNewConversations;
+                using (MySqlCommand cmd = new(@"
+                    SELECT COUNT(1)
+                    FROM xcx_conversation
+                    WHERE CreateTime >= CURDATE()
+                      AND CreateTime < DATE_ADD(CURDATE(), INTERVAL 1 DAY)", _connection))
+                {
+                    todayNewConversations = Convert.ToInt64(await cmd.ExecuteScalarAsync());
+                }
+
+                // 4) 总用户数：UserKey/PhoneNumber 不为空
+                long totalUsers;
+                using (MySqlCommand cmd = new(@"
+                    SELECT COUNT(1)
+                    FROM xcx_users
+                    WHERE UserKey IS NOT NULL AND UserKey <> ''
+                      AND PhoneNumber IS NOT NULL AND PhoneNumber <> ''", _connection))
+                {
+                    totalUsers = Convert.ToInt64(await cmd.ExecuteScalarAsync());
+                }
+
+                var data = new AdminStatsResponse
+                {
+                    ActiveUsers = activeUsers,
+                    TotalConversations = totalConversations,
+                    TodayNewConversations = todayNewConversations,
+                    TotalUsers = totalUsers
+                };
+
+                return Ok(new { success = true, data });
+            }
+            catch (Exception ex)
+            {
+                return StatusCode(500, new { success = false, message = "查询失败", error = ex.Message });
+            }
+            finally
+            {
+                if (_connection.State == ConnectionState.Open)
+                {
+                    await _connection.CloseAsync();
+                }
+            }
+        }
     }
 
     public class ConversationQueryRequest
@@ -240,4 +314,12 @@ namespace WxCheckMvc.Controllers
         public string AvatarUrl { get; set; }
         public string Department { get; set; }
     }
+
+    public class AdminStatsResponse
+    {
+        public long ActiveUsers { get; set; }
+        public long TotalConversations { get; set; }
+        public long TodayNewConversations { get; set; }
+        public long TotalUsers { get; set; }
+    }
 }