feat(questionnaire): 添加下载问卷小程序二维码功能

- 新增 downloadQrCode 方法，用于生成和下载问卷小程序二维码
- 集成微信小程序配置和二维码生成工具
- 实现问卷二维码的生成、上传和访问控制

src/main/java/com/ycwl/basic/controller/pc/QuestionnaireV2Controller.java

@@ -6,12 +6,19 @@ import com.ycwl.basic.integration.questionnaire.dto.questionnaire.QuestionnaireR
 import com.ycwl.basic.integration.questionnaire.dto.statistics.QuestionnaireStatistics;
 import com.ycwl.basic.integration.questionnaire.service.QuestionnaireIntegrationService;
 import com.ycwl.basic.integration.common.response.PageResponse;
+import com.ycwl.basic.model.pc.mp.MpConfigEntity;
+import com.ycwl.basic.repository.ScenicRepository;
+import com.ycwl.basic.storage.StorageFactory;
+import com.ycwl.basic.storage.adapters.IStorageAdapter;
+import com.ycwl.basic.storage.enums.StorageAcl;
 import com.ycwl.basic.utils.ApiResponse;
+import com.ycwl.basic.utils.WxMpUtil;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.web.bind.annotation.*;
 
+import java.io.File;
 import java.util.Map;
 
 /**
@@ -27,6 +34,7 @@ import java.util.Map;
 public class QuestionnaireV2Controller {
 
     private final QuestionnaireIntegrationService questionnaireIntegrationService;
+    private final ScenicRepository scenicRepository;
 
     // ========== 问卷管理 CRUD 操作 ==========
 
@@ -261,4 +269,45 @@ public class QuestionnaireV2Controller {
         }
     }
 
+    /**
+     * 下载问卷小程序二维码
+     */
+    @GetMapping("/{id}/QRCode")
+    public ApiResponse<String> downloadQrCode(@PathVariable Long id) {
+        log.info("下载问卷小程序二维码, id: {}", id);
+        try {
+            // 获取问卷详情
+            QuestionnaireResponse questionnaire = questionnaireIntegrationService.getQuestionnaire(id);
+            if (questionnaire == null) {
+                return ApiResponse.fail("问卷不存在");
+            }
+
+            MpConfigEntity mpConfig = scenicRepository.getScenicMpConfig(3930324797233434624L);
+            if (mpConfig == null) {
+                return ApiResponse.fail("小程序配置不存在");
+            }
+
+            String appId = mpConfig.getAppId();
+            String appSecret = mpConfig.getAppSecret();
+            String appState = mpConfig.getState();
+            String path = "pages/questionnaire/index?id=" + id;
+            String filePath = "qr_code_questionnaire_" + id + ".jpg";
+
+            IStorageAdapter adapter = StorageFactory.use();
+            if (adapter.isExists(filePath)) {
+                return ApiResponse.success(adapter.getUrl(filePath));
+            }
+
+            WxMpUtil.generateWXAQRCode(appId, appSecret, appState, path, filePath);
+            File file = new File(filePath);
+            String s = adapter.uploadFile(null, file, filePath);
+            file.delete();
+            adapter.setAcl(StorageAcl.PUBLIC_READ, filePath);
+            return ApiResponse.success(s);
+        } catch (Exception e) {
+            log.error("生成问卷二维码失败, id: {}", id, e);
+            return ApiResponse.fail("生成二维码失败: " + e.getMessage());
+        }
+    }
+
 }