进行了一些小修复

assets/css/frontend/pages/submit.css

@@ -149,6 +149,11 @@
   box-shadow: 0 18px 60px rgba(0, 0, 0, 0.2);
 }
 
+.aksrt-editor-media__dialog:focus {
+  outline: 0;
+  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.2);
+}
+
 .aksrt-editor-media__close {
   position: absolute;
   z-index: 2;

assets/js/front-submit-editor.js

@@ -110,7 +110,7 @@
     root.innerHTML =
       '<button type="button" class="aksrt-editor-media__backdrop" data-editor-media-close tabindex="-1" aria-label="' +
         escapeAttr(i18n.close || '关闭') + '"></button>' +
-      '<div class="aksrt-editor-media__dialog">' +
+      '<div class="aksrt-editor-media__dialog" tabindex="-1">' +
         '<button type="button" class="aksrt-editor-media__close" data-editor-media-close aria-label="' +
           escapeAttr(i18n.close || '关闭') + '">&times;</button>' +
         '<h3 id="aksrt-editor-media-title" class="aksrt-editor-media__title">' +
@@ -268,9 +268,9 @@
     };
     activeModal = { root: root, onKeydown: onKeydown };
     document.addEventListener('keydown', onKeydown);
-    var focusTarget = root.querySelector('[data-editor-media-tab].is-active');
+    var focusTarget = root.querySelector('.aksrt-editor-media__dialog');
     if (focusTarget) {
-      focusTarget.focus();
+      focusTarget.focus({ preventScroll: true });
     }
   }
 

tests/widget-system/post-editor-reference-contract.test.cjs

@@ -65,6 +65,9 @@ test('front submit image and visibility actions live in the TinyMCE toolbar', ()
   assert.match(editor, /type:\s*'menubutton'/);
   assert.match(editor, /data-editor-media-tab="upload"/);
   assert.match(editor, /data-editor-media-tab="external"/);
+  assert.match(editor, /class="aksrt-editor-media__dialog" tabindex="-1"/);
+  assert.match(editor, /querySelector\('\.aksrt-editor-media__dialog'\)/);
+  assert.doesNotMatch(editor, /focusTarget\s*=\s*root\.querySelector\('\[data-editor-media-tab\]\.is-active'\)/);
   assert.match(editor, /\(cfg\.uploads \|\| \{\}\)\.image/);
   assert.match(page, /'canUploadImage'\s*=>\s*!empty\(\$ctx\['can_upload_img'\]\)/);
   assert.doesNotMatch(main, /newposts-editor-tools|data-insert-shortcode|data-insert-upload-image/);