ui: auto convert \r\n

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.11.37",
+  "version": "4.11.38",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/pages/problem_files.page.js

@@ -194,7 +194,7 @@ const page = new NamedPage('problem_files', () => {
       model: `hydro://problem/file/${filename}`,
     });
     const action = await promise;
-    value = editor.value();
+    value = editor.value().replace(/\r\n/g, '\n');
     editor.destory();
     if (action !== 'ok') return null;
     return value;