diff --git a/src/pages/auth/loading.vue b/src/pages/auth/loading.vue
index 24e2198..a11cd91 100644
--- a/src/pages/auth/loading.vue
+++ b/src/pages/auth/loading.vue
@@ -113,8 +113,11 @@ export default {
         });
 
         const data = res.data || {};
+        console.log('[loading] login response:', JSON.stringify(data, null, 2));
+
         if (data.code === 0 && data.data) {
           const result = data.data;
+          console.log('[loading] login result:', JSON.stringify(result, null, 2));
 
           // 清除 URL 中的 code 参数，避免刷新重复处理
           const url = new URL(window.location.href);
@@ -126,11 +129,13 @@ export default {
             // 已注册 → 缓存 JWT → 跳转首页
             uni.setStorageSync('token', result.token);
             uni.setStorageSync('user_info', result.user_info);
+            console.log('[loading] stored user_info:', JSON.stringify(result.user_info, null, 2));
             this.goToHome();
           } else {
             // 未注册 → 缓存临时数据 → 跳转注册页
             uni.setStorageSync('temp_token', result.temp_token);
             uni.setStorageSync('auth_info', result.auth_info);
+            console.log('[loading] stored auth_info:', JSON.stringify(result.auth_info, null, 2));
             this.goToRegister();
           }
         } else {
@@ -152,6 +157,14 @@ export default {
     },
 
     goToRegister() {
+      // 记录扫码时的原始 URL，注册完成后跳回
+      const scanUrl = this.deviceId
+        ? `/pages/index/index?device_id=${this.deviceId}`
+        : '';
+      if (scanUrl) {
+        uni.setStorageSync('__scan_redirect_url', scanUrl);
+      }
+
       const url = this.deviceId
         ? `/pages/register/register?device_id=${this.deviceId}`
         : '/pages/register/register';
diff --git a/src/pages/index/index.vue b/src/pages/index/index.vue
index fd597be..bb2431c 100644
--- a/src/pages/index/index.vue
+++ b/src/pages/index/index.vue
@@ -254,11 +254,13 @@ export default {
     // 从缓存加载用户信息
     loadUserInfo() {
       const cached = getCachedUserInfo();
+      console.log('[index] getCachedUserInfo:', JSON.stringify(cached, null, 2));
       if (cached) {
         this.userInfo = { ...this.userInfo, ...cached };
       } else {
         this.userInfo = { nickname: '', phone: '', avatar: '' };
       }
+      console.log('[index] this.userInfo:', JSON.stringify(this.userInfo, null, 2));
     },
     async fetchProducts() {
       this.loading = true;
diff --git a/src/pages/register/register.vue b/src/pages/register/register.vue
index 2a2a277..0a0bc29 100644
--- a/src/pages/register/register.vue
+++ b/src/pages/register/register.vue
@@ -201,11 +201,16 @@ export default {
           uni.hideLoading();
           uni.showToast({ title: '注册成功', icon: 'success' });
 
-          // 跳转首页
+          // 跳转到扫码时的页面（优先使用缓存的扫码URL）
           setTimeout(() => {
-            const url = this.deviceId
-              ? `/pages/index/index?device_id=${this.deviceId}`
-              : '/pages/index/index';
+            const scanRedirectUrl = uni.getStorageSync('__scan_redirect_url');
+            uni.removeStorageSync('__scan_redirect_url'); // 使用后立即清除
+
+            const url = scanRedirectUrl
+              ? scanRedirectUrl
+              : this.deviceId
+                ? `/pages/index/index?device_id=${this.deviceId}`
+                : '/pages/index/index';
             uni.redirectTo({ url });
           }, 1500);
         } else {
diff --git a/src/utils/auth-guard.js b/src/utils/auth-guard.js
index 640f8e6..5788080 100644
--- a/src/utils/auth-guard.js
+++ b/src/utils/auth-guard.js
@@ -72,7 +72,9 @@ export function logout() {
  */
 export function getCachedUserInfo() {
   try {
-    return uni.getStorageSync('user_info') || null;
+    const userInfo = uni.getStorageSync('user_info');
+    console.log('[auth-guard] getCachedUserInfo raw:', JSON.stringify(userInfo, null, 2));
+    return userInfo || null;
   } catch {
     return null;
   }