fix(submit): raise TinyMCE fullscreen above the fixed navbar

TinyMCE's skin injects .mce-fullscreen { z-index: 100 } at editor init,
after core editor.css, so the fullscreen editor (toolbar at the viewport
top) lost to the fixed navbar (.nav-fixed .header, z-index 999). Restore
core's intended 100010 with an element+class selector that outranks the
skin regardless of injection order; it stays below the submit media
dialog (100080). Also remove the dead .mce-top-part.affix rules (no
AKSRT script drives them) and pin both in a contract test.

.gitignore

@@ -56,6 +56,7 @@
 !/tests/front-submit/
 /tests/front-submit/*
 !/tests/front-submit/video-cover-contract.test.cjs
+!/tests/front-submit/editor-fullscreen-contract.test.cjs
 !/tests/asset-ledger/
 !/tests/asset-ledger/*.php
 !/tests/visual/docker-compose.zibll.yml

assets/css/frontend/pages/submit.css

@@ -51,19 +51,18 @@
   border: 0;
 }
 
-.newposts-editor .mce-top-part.affix {
-  position: fixed;
-}
-
-.newposts-editor .mce-top-part.affix-bottom {
-  position: absolute;
-}
-
 .newposts-editor .wp-editor-container {
   overflow: hidden;
   border-radius: 0;
 }
 
+/* TinyMCE 全屏容器：skin 样式在编辑器初始化时注入（晚于核心 editor.css），
+   其 .mce-fullscreen 的 z-index:100 压不过固定导航栏（.nav-fixed .header 为 999）。
+   用元素+类选择器提高优先级，恢复 WP 核心预期的 100010，仍低于投稿媒体弹层（100080）。 */
+div.mce-fullscreen {
+  z-index: 100010;
+}
+
 .newposts-editor .mce-toolbar-grp,
 .newposts-editor div.mce-toolbar-grp {
   border-bottom: 0;
@@ -547,12 +546,30 @@ body.aksrt-editor-media-open {
   font-size: 1em;
 }
 
+/* 纯图标按钮（设置视频封面/视频/清除）：fa 字形行高与文字不同导致图标上偏，
+   用 flex 居中修正；并去掉 legacy .but 给图标加的文字间距。btn-delete 的
+   hidden 属性切换依赖默认 display，故用 :not([hidden]) 守卫。 */
+.featured-edit .btns-full .btn-video,
+.featured-edit .btns-full .btn-delete:not([hidden]) {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
 .featured-edit .btns-full .btn-video-pic {
   display: none;
 }
 
 .featured-loaded.video .btns-full .btn-video-pic {
   display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.featured-edit .btns-full .btn-video-pic > .fa,
+.featured-edit .btns-full .btn-video > .fa,
+.featured-edit .btns-full .btn-delete > .fa {
+  margin-right: 0;
 }
 
 .featured-loaded.image .btn-video,

assets/js/front-submit.js

@@ -522,7 +522,7 @@
             type: 'image',
             multiple: false,
             allowExternal: false,
-            title: i18n.setVideoCoverTitle || '为视频设置首图封面',
+            title: i18n.setVideoCoverTitle || '为视频设置封面',
             onSelect: function (cover) {
               self.setFeatured('video', {
                 url: current.data.url,
@@ -554,7 +554,7 @@
                   type: 'image',
                   multiple: false,
                   allowExternal: false,
-                  title: i18n.setVideoCoverTitle || '为视频设置首图封面',
+                  title: i18n.setVideoCoverTitle || '为视频设置封面',
                   onSelect: function (cover) {
                     self.setFeatured('video', {
                       url: video.url,

templates/pages/page-submit.php

@@ -147,8 +147,7 @@ if (file_exists($js)) {
 			'fileTooLarge'  => __('文件大小超过限制', 'aksrt'),
 			'lastSaved'     => __('最后保存：', 'aksrt'),
 			'preview'       => __('预览文章', 'aksrt'),
-			'setVideoCover' => __('设置视频首图封面', 'aksrt'),
-			'setVideoCoverTitle' => __('为视频设置首图封面', 'aksrt'),
+			'setVideoCoverTitle' => __('为视频设置封面', 'aksrt'),
 			'close'         => __('关闭', 'aksrt'),
 			'insertImage'   => __('插入图片', 'aksrt'),
 			'uploadImage'   => __('上传图片', 'aksrt'),

templates/parts/submit/featured.php

@@ -47,8 +47,10 @@ $can_video = !empty($ctx['can_cover_video']);
 			</button>
 		<?php endif; ?>
 		<?php if ($can_video) : ?>
-			<button type="button" class="but btn-video-pic" data-featured-action="video_pic">
-				<i class="fa fas fa-image"></i> <?php esc_html_e('设置视频首图封面', 'aksrt'); ?>
+			<button type="button" class="but btn-video-pic" data-featured-action="video_pic"
+				title="<?php esc_attr_e('设置视频封面', 'aksrt'); ?>"
+				aria-label="<?php esc_attr_e('设置视频封面', 'aksrt'); ?>">
+				<i class="fa fas fa-image"></i>
 			</button>
 		<?php endif; ?>
 		<?php if ($can_slide) : ?>
@@ -57,12 +59,16 @@ $can_video = !empty($ctx['can_cover_video']);
 			</button>
 		<?php endif; ?>
 		<?php if ($can_video) : ?>
-			<button type="button" class="but btn-video" data-featured-action="video">
-				<i class="fa fas fa-video"></i> <?php esc_html_e('视频', 'aksrt'); ?>
+			<button type="button" class="but btn-video" data-featured-action="video"
+				title="<?php esc_attr_e('视频', 'aksrt'); ?>"
+				aria-label="<?php esc_attr_e('视频', 'aksrt'); ?>">
+				<i class="fa fas fa-video"></i>
 			</button>
 		<?php endif; ?>
-		<button type="button" class="but c-red btn-delete" data-featured-action="close" <?php echo $type === '' ? 'hidden' : ''; ?>>
-			<i class="fa fas fa-trash-alt"></i> <?php esc_html_e('清除', 'aksrt'); ?>
+		<button type="button" class="but c-red btn-delete" data-featured-action="close" <?php echo $type === '' ? 'hidden' : ''; ?>
+			title="<?php esc_attr_e('清除', 'aksrt'); ?>"
+			aria-label="<?php esc_attr_e('清除', 'aksrt'); ?>">
+			<i class="fa fas fa-trash-alt"></i>
 		</button>
 	</div>
 	<input type="hidden" name="featured_data" value="<?php echo esc_attr(wp_json_encode(['type' => $type, 'data' => $data])); ?>" data-featured-json>

tests/front-submit/editor-fullscreen-contract.test.cjs

@@ -0,0 +1,35 @@
+'use strict';
+
+const assert = require('node:assert/strict');
+const fs = require('node:fs');
+const path = require('node:path');
+const test = require('node:test');
+
+const root = path.resolve(__dirname, '..', '..');
+const read = (file) => fs.readFileSync(path.join(root, file), 'utf8');
+
+test('submit.css raises the TinyMCE fullscreen container above the fixed navbar', () => {
+  const css = read('assets/css/frontend/pages/submit.css');
+
+  // TinyMCE's skin injects .mce-fullscreen { z-index: 100 } at editor init,
+  // after core editor.css, so the fullscreen editor loses to the fixed navbar
+  // (.nav-fixed .header, z-index 999). The element+class selector outranks the
+  // skin regardless of injection order and restores core's intended 100010,
+  // which stays below the submit media dialog (100080).
+  assert.match(css, /div\.mce-fullscreen \{\s*\n  z-index: 100010;\s*\n\}/);
+});
+
+test('the Zibll toolbar affix rules stay removed', () => {
+  const css = read('assets/css/frontend/pages/submit.css');
+  const jsRoot = path.join(root, 'assets/js');
+  const js = fs
+    .readdirSync(jsRoot, { withFileTypes: true })
+    .filter((entry) => entry.isFile())
+    .map((entry) => read(`assets/js/${entry.name}`))
+    .join('\n');
+
+  // No AKSRT script adds .affix to .mce-top-part (that was Zibll's
+  // editextend.js), so the affix positioning rules must not come back.
+  assert.doesNotMatch(css, /mce-top-part\.affix/);
+  assert.doesNotMatch(js, /mce-top-part/);
+});

tests/front-submit/video-cover-contract.test.cjs

@@ -17,7 +17,12 @@ test('featured box renders a playable video preview and a video-cover button', (
   assert.match(featured, /fa fas fa-play-circle/);
 
   // The video-cover button is capability-gated like the video button.
-  assert.match(featured, /if \(\$can_video\) : \?>\s*\n\s*<button type="button" class="but btn-video-pic" data-featured-action="video_pic">/);
+  assert.match(featured, /if \(\$can_video\) : \?>\s*\n\s*<button type="button" class="but btn-video-pic" data-featured-action="video_pic"\s*\n\s*title="<\?php esc_attr_e\('设置视频封面', 'aksrt'\); \?>"/);
+
+  // The video row (video cover / video / clear) is icon-only with hover titles.
+  assert.match(featured, /btn-video" data-featured-action="video"\s*\n\s*title="<\?php esc_attr_e\('视频', 'aksrt'\); \?>"\s*\n\s*aria-label="<\?php esc_attr_e\('视频', 'aksrt'\); \?>">\s*\n\s*<i class="fa fas fa-video"><\/i>\s*\n\s*<\/button>/);
+  assert.match(featured, /btn-delete" data-featured-action="close"[\s\S]*?title="<\?php esc_attr_e\('清除', 'aksrt'\); \?>"/);
+  assert.doesNotMatch(featured, /首图|>视频<|>清除</);
 
   // Dead capability attributes are gone.
   assert.doesNotMatch(featured, /data-can-(image|slide|video)=/);
@@ -46,7 +51,9 @@ test('submit.css toggles the video-cover button like the reference theme', () =>
   const css = read('assets/css/frontend/pages/submit.css');
 
   assert.match(css, /\.featured-edit \.btns-full \.btn-video-pic \{\s*\n  display: none;\s*\n\}/);
-  assert.match(css, /\.featured-loaded\.video \.btns-full \.btn-video-pic \{\s*\n  display: inline-flex;\s*\n\}/);
+  assert.match(css, /\.featured-loaded\.video \.btns-full \.btn-video-pic \{\s*\n  display: inline-flex;\s*\n  align-items: center;\s*\n  justify-content: center;\s*\n\}/);
+  assert.match(css, /\.featured-edit \.btns-full \.btn-video,\s*\n\.featured-edit \.btns-full \.btn-delete:not\(\[hidden\]\) \{\s*\n  display: inline-flex;\s*\n  align-items: center;\s*\n  justify-content: center;\s*\n\}/);
+  assert.match(css, /\.featured-edit \.btns-full \.btn-video-pic > \.fa,[\s\S]*?\.featured-edit \.btns-full \.btn-delete > \.fa \{\s*\n  margin-right: 0;\s*\n\}/);
   assert.doesNotMatch(css, /featured-video-placeholder/);
 });
 
@@ -71,8 +78,11 @@ test('i18n exposes the video-cover strings and dead keys are removed', () => {
   const editorJs = read('assets/js/front-submit-editor.js');
   const submitJs = read('assets/js/front-submit.js');
 
-  assert.match(page, /'setVideoCover' => __\('设置视频首图封面', 'aksrt'\)/);
-  assert.match(page, /'setVideoCoverTitle' => __\('为视频设置首图封面', 'aksrt'\)/);
+  assert.match(page, /'setVideoCoverTitle' => __\('为视频设置封面', 'aksrt'\)/);
+  // The unused setVideoCover key died with the visible button label it served.
+  assert.doesNotMatch(page, /'setVideoCover' =>/);
+  assert.doesNotMatch(page, /首图/);
+  assert.doesNotMatch(submitJs, /首图/);
   assert.doesNotMatch(page, /'(pickImage|pickVideo|pickVideoCover|pickVideoResource|videoUrl)'/);
 
   // data-video-name / mediaUrl stay: pinned by tinymce.css and the