feat: 抖音扫码登录，自动填写 Cookie 和 SecUserId

新增 DyQrCodeService，调用 sso.douyin.com 二维码接口；
ConfigController 新增 qrcode/qrstatus/qrbind 三个接口；
前端账号列表每行增加"扫码登录"按钮，展示二维码弹窗并自动轮询绑定。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/store/coreapi.ts

@@ -200,6 +200,27 @@ export const useApiStore = defineStore('coreapi', () => {
     });
   }
 
+  // 获取抖音扫码登录二维码
+  async function QrCodeGet() {
+    return http.request<any, Response<any>>('/api/config/qrcode', 'get').then(r => {
+      return r.data;
+    });
+  }
+
+  // 轮询扫码状态
+  async function QrCodeStatus(token: string) {
+    return http.request<any, Response<any>>('/api/config/qrstatus?token=' + token, 'get').then(r => {
+      return r.data;
+    });
+  }
+
+  // 扫码成功后绑定到账号
+  async function QrCodeBind(token: string, id: string) {
+    return http.request<any, Response<any>>(`/api/config/qrbind?token=${token}&id=${id}`, 'post_json').then(r => {
+      return r.data;
+    });
+  }
+
   return {
     deleteCookie,
     UpdateConfig,
@@ -216,6 +237,9 @@ export const useApiStore = defineStore('coreapi', () => {
     VideoCategories,
     VideoCleanup,
     CookiePageList,
-    DeleteAuthorVideos
+    DeleteAuthorVideos,
+    QrCodeGet,
+    QrCodeStatus,
+    QrCodeBind
   };
 });