feat:增加通过航线id查询航线详情的接口

src/main/java/com/ruoyi/airline/controller/AirlineFileController.java

@@ -77,4 +77,15 @@ public class AirlineFileController extends BaseController {
         }
     }
 
+    @GetMapping("/{id}")
+    @Operation(summary = "根据ID查询航线文件详情")
+    public AjaxResult getById(@PathVariable Long id) {
+        AirlineFileDTO dto = airlineFileService.selectById(id);
+        if (dto == null) {
+            return error("航线文件不存在");
+        }
+        AirlineFileVO vo = AirlineFileControllerConvert.from(dto);
+        return success(vo);
+    }
+
 }