fix: 清理两个 Controller 里 upstream 残留的孤儿代码

- VideoController.cs 删除 GetAllCategories 方法（调用不存在的
  dyCollectVideoService.GetAllCategoriesAsync）
- ConfigController.cs 删除 GetQrCode/GetQrStatus/BindQrCode 三个
  扫码相关方法（引用已删除的 _qrCodeService）

都是 cf40a7e merge 用 -X theirs 时保留下来但无法编译的孤儿。
feature 分支上这些方法本来就不存在（新架构不含此功能）。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Controllers/ConfigController.cs

@@ -405,84 +405,6 @@ namespace dy.net.Controllers
         }
 
 
-        /// <summary>
-        /// 获取抖音扫码登录二维码
-        /// </summary>
-        [HttpGet("qrcode")]
-        [Authorize]
-        public async Task<IActionResult> GetQrCode()
-        {
-            try
-            {
-                var (token, qrBase64) = await _qrCodeService.GetQrCodeAsync();
-                return Ok(new { code = 0, data = new { token, qrBase64 } });
-            }
-            catch (Exception ex)
-            {
-                Serilog.Log.Error($"获取二维码失败: {ex.Message}");
-                return Ok(new { code = -1, error = "获取二维码失败：" + ex.Message });
-            }
-        }
-
-        /// <summary>
-        /// 轮询扫码状态（前端每2秒调一次）
-        /// status: 1=待扫码, 2=已扫码待确认, 3=登录成功, -1=已过期
-        /// </summary>
-        [HttpGet("qrstatus")]
-        [Authorize]
-        public async Task<IActionResult> GetQrStatus([FromQuery] string token)
-        {
-            try
-            {
-                var (status, cookies, secUserId) = await _qrCodeService.CheckStatusAsync(token);
-                return Ok(new { code = 0, data = new { status, hasCookies = !string.IsNullOrEmpty(cookies), secUserId } });
-            }
-            catch (Exception ex)
-            {
-                Serilog.Log.Error($"查询扫码状态失败: {ex.Message}");
-                return Ok(new { code = -1, error = "查询失败：" + ex.Message });
-            }
-        }
-
-        /// <summary>
-        /// 扫码成功后，将 Cookie 绑定到指定账号
-        /// </summary>
-        [HttpPost("qrbind")]
-        [Authorize]
-        public async Task<IActionResult> BindQrCode([FromQuery] string token, [FromQuery] string id)
-        {
-            try
-            {
-                var (cookies, secUserId) = _qrCodeService.GetSessionResult(token);
-                if (string.IsNullOrEmpty(cookies))
-                    return Ok(new { code = -1, error = "扫码尚未完成或已过期" });
-
-                var account = await dyCookieService.GetByIdAsync(id);
-                if (account == null)
-                    return Ok(new { code = -1, error = "账号不存在" });
-
-                account.Cookies = cookies;
-                if (!string.IsNullOrEmpty(secUserId))
-                    account.SecUserId = secUserId;
-                account.Status = 1;
-
-                var result = await dyCookieService.UpdateAsync(account);
-                _qrCodeService.RemoveSession(token);
-
-                if (result)
-                {
-                    await ReStartJob();
-                    return Ok(new { code = 0, data = new { secUserId } });
-                }
-                return Ok(new { code = -1, error = "保存失败" });
-            }
-            catch (Exception ex)
-            {
-                Serilog.Log.Error($"绑定Cookie失败: {ex.Message}");
-                return Ok(new { code = -1, error = "绑定失败：" + ex.Message });
-            }
-        }
-
         private void ReStartJob()
         {
             var config = commonService.GetConfig();