fix: 开放接口支持模糊匹配项目名，添加 TtFile 导入

- TtCodeMapper.xml: selectTtCodeByCodeName 改为模糊匹配
- TtCopyTemplateController: 添加 TtFile import，var 改为显式类型

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ruoyi-office/src/main/java/com/ruoyi/office/controller/TtCopyTemplateController.java

@@ -21,6 +21,7 @@ import com.ruoyi.common.enums.BusinessType;
 import com.ruoyi.common.utils.HtmlUtils;
 import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.office.domain.TtCode;
+import com.ruoyi.office.domain.TtFile;
 import com.ruoyi.office.domain.TtCopyTemplate;
 import com.ruoyi.office.service.ITtCodeService;
 import com.ruoyi.office.service.ITtCopyTemplateService;
@@ -160,7 +161,7 @@ public class TtCopyTemplateController extends BaseController {
         String screenshots = "";
         int idx = 0;
         if (code.getFileList() != null && !code.getFileList().isEmpty()) {
-            for (var item : code.getFileList()) {
+            for (TtFile item : code.getFileList()) {
                 screenshots += (++idx) + "." + item.getFileName() + "\n![](" + item.getFileUrl() + ")\n\n";
             }
         } else {