diff --git a/apps/miniprogram/src/stores/auth.ts b/apps/miniprogram/src/stores/auth.ts
index 159db24..2348a83 100644
--- a/apps/miniprogram/src/stores/auth.ts
+++ b/apps/miniprogram/src/stores/auth.ts
@@ -148,13 +148,19 @@ export const useAuthStore = create<AuthState>((set, get) => ({
         get().loadPatients();
         return true;
       }
+      // 未绑定：存储 openid 供后续绑定流程使用
+      if (!resp.openid) {
+        set({ loading: false });
+        throw new Error('登录失败：服务器未返回用户标识');
+      }
       secureSet('wechat_openid', resp.openid);
       set({ loading: false });
       return false;
     } catch (err) {
       console.warn('[auth] 微信登录失败:', err);
       set({ loading: false });
-      return false;
+      // 不吞掉错误 — 让调用方区分"未绑定"和"真正的错误"
+      throw err;
     }
   },