fix(controller): 将 themeId 参数改为可选

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

@@ -85,7 +85,7 @@ public class ThemesController {
 
     @GetMapping("/recommended")
     @Operation(summary = "推荐主题列表", description = "按真实下载数量降序返回推荐主题")
-    public BaseResponse<List<KeyboardThemesRespVO>> getRecommendedThemes(@RequestParam Long themeId) {
+    public BaseResponse<List<KeyboardThemesRespVO>> getRecommendedThemes(@RequestParam(required = false) Long themeId) {
         Long userId = StpUtil.getLoginIdAsLong();
         List<KeyboardThemesRespVO> result = themesService.getRecommendedThemes(userId, themeId);
         return ResultUtils.success(result);