feat(themes): 新增查询用户已购主题接口

在 KeyboardThemePurchaseService 及其实现中增加 getUserPurchasedThemes 方法，
通过用户ID获取已支付主题列表；同步新增 /themes/purchased 接口并放行鉴权。
补充 KeyboardThemesRespVO 缺失的 themePreviewImageUrl 字段。

src/main/java/com/yolo/keyborad/config/SaTokenConfigure.java

@@ -89,6 +89,7 @@ public class SaTokenConfigure implements WebMvcConfigurer {
                 "/themes/listByStyle",
                 "/wallet/balance",
                 "/themes/purchase",
+                "/themes/purchased",
                 "/themes/purchase/list"
         };
     }

src/main/java/com/yolo/keyborad/controller/ThemesController.java

@@ -67,4 +67,12 @@ public class ThemesController {
         return ResultUtils.success(result);
     }
 
+    @GetMapping("/purchased")
+    @Operation(summary = "查询已购买的主题", description = "查询当前用户已购买的主题列表")
+    public BaseResponse<List<KeyboardThemesRespVO>> getPurchasedThemes() {
+        Long userId = StpUtil.getLoginIdAsLong();
+        List<KeyboardThemesRespVO> result = themePurchaseService.getUserPurchasedThemes(userId);
+        return ResultUtils.success(result);
+    }
+
 }

src/main/java/com/yolo/keyborad/model/vo/themes/KeyboardThemesRespVO.java

@@ -48,6 +48,8 @@ public class KeyboardThemesRespVO {
     @Schema(description = "主题风格")
     private Long themeStyle;
 
+    @Schema(description = "预览图")
+    private String themePreviewImageUrl;
     /**
      * 主题状态
      */

src/main/java/com/yolo/keyborad/service/KeyboardThemePurchaseService.java

@@ -4,6 +4,7 @@ import com.yolo.keyborad.model.entity.KeyboardThemePurchase;
 import com.baomidou.mybatisplus.extension.service.IService;
 import com.yolo.keyborad.model.vo.purchase.ThemePurchaseListRespVO;
 import com.yolo.keyborad.model.vo.purchase.ThemePurchaseRespVO;
+import com.yolo.keyborad.model.vo.themes.KeyboardThemesRespVO;
 
 import java.util.List;
 
@@ -23,4 +24,9 @@ public interface KeyboardThemePurchaseService extends IService<KeyboardThemePurc
      * 查询用户购买记录
      */
     List<ThemePurchaseListRespVO> getUserPurchaseList(Long userId);
+
+    /**
+     * 查询用户已购买的主题列表
+     */
+    List<KeyboardThemesRespVO> getUserPurchasedThemes(Long userId);
 }

src/main/java/com/yolo/keyborad/service/impl/KeyboardThemePurchaseServiceImpl.java

@@ -7,6 +7,7 @@ import com.yolo.keyborad.model.entity.KeyboardUserWallet;
 import com.yolo.keyborad.model.entity.KeyboardWalletTransaction;
 import com.yolo.keyborad.model.vo.purchase.ThemePurchaseListRespVO;
 import com.yolo.keyborad.model.vo.purchase.ThemePurchaseRespVO;
+import com.yolo.keyborad.model.vo.themes.KeyboardThemesRespVO;
 import com.yolo.keyborad.service.KeyboardThemesService;
 import com.yolo.keyborad.service.KeyboardUserWalletService;
 import com.yolo.keyborad.service.KeyboardWalletTransactionService;
@@ -181,4 +182,52 @@ public class KeyboardThemePurchaseServiceImpl extends ServiceImpl<KeyboardThemeP
             return vo;
         }).collect(java.util.stream.Collectors.toList());
     }
+
+    @Override
+
+    /**
+     * 获取用户已购买的主题列表
+     * 
+     * @param userId 用户ID
+     * @return 用户已购买的主题详情列表
+     */
+    public List<KeyboardThemesRespVO> getUserPurchasedThemes(Long userId) {
+        // 1. 查询用户所有已支付的主题ID列表
+        List<Long> themeIds = this.lambdaQuery()
+                .eq(KeyboardThemePurchase::getUserId, userId)  // 根据用户ID筛选
+                .eq(KeyboardThemePurchase::getPayStatus, (short) 1)  // 支付状态为1（已支付）
+                .list()
+                .stream()
+                .map(KeyboardThemePurchase::getThemeId)  // 提取主题ID
+                .distinct()  // 去重
+                .collect(java.util.stream.Collectors.toList());
+
+        // 2. 如果没有购买记录，返回空列表
+        if (themeIds.isEmpty()) {
+            return java.util.Collections.emptyList();
+        }
+
+        // 3. 根据主题ID列表查询主题详情，并转换为响应VO对象
+        return themesService.lambdaQuery()
+                .in(KeyboardThemes::getId, themeIds)  // 根据主题ID列表查询
+                .eq(KeyboardThemes::getDeleted, false)  // 排除已删除的主题
+                .list()
+                .stream()
+                .map(theme -> {
+                    // 创建响应VO对象并填充主题信息
+                    KeyboardThemesRespVO vo = new KeyboardThemesRespVO();
+                    vo.setId(theme.getId());  // 主题ID
+                    vo.setThemePreviewImageUrl(theme.getThemePreviewImageUrl()); // 主题预览图片
+                    vo.setThemeName(theme.getThemeName());  // 主题名称
+                    vo.setThemePrice(theme.getThemePrice());  // 主题价格
+                    vo.setThemeTag(theme.getThemeTag());  // 主题标签
+                    vo.setThemeDownload(theme.getThemeDownload());  // 下载地址
+                    vo.setThemeStyle(theme.getThemeStyle());  // 主题风格
+                    vo.setThemeStatus(theme.getThemeStatus());  // 主题状态
+                    vo.setThemePurchasesNumber(theme.getThemePurchasesNumber());  // 购买次数
+                    vo.setSort(theme.getSort());  // 排序值
+                    vo.setIsFree(theme.getIsFree());  // 是否免费
+                    return vo;
+                }).collect(java.util.stream.Collectors.toList());
+    }
 }