feat(creator-studio): centered paper layout and scheduled publishing

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

assets/creator-studio/src/panels/publish-drawer.tsx

@@ -1,7 +1,8 @@
 /**
  * 发布配置抽屉。
  *
- * 封面、分类、摘要、付费与资料附件都只在这里出现，正文画布保持干净；
+ * 分类、标签、付费与资料附件都在这里配置；封面与定时发布在正文下方的
+ * 「发布设置」卡片里，避免把封面入口和正文挤在同一张纸上。
  * 手机端以全屏面板呈现。所有字段与权限来自服务端 bootstrap，前端不自行放大权限。
  *
  * @package Jio
@@ -12,7 +13,6 @@ import { __, sprintf } from '@wordpress/i18n';
 
 import { apiUpload } from '../services/api';
 
-type Featured = { type: string; data: Record<string, any>; mediaId?: number };
 type PayState = {
 	enabled: boolean;
 	modo: 'cash' | 'points';
@@ -27,11 +27,9 @@ type PayState = {
 type Draft = {
 	postId: number;
 	title: string;
-	excerpt: string;
 	categories: number[];
 	tags: string[];
 	custom: Record<string, string[]>;
-	featured: Featured;
 	pay: PayState;
 };
 
@@ -89,7 +87,6 @@ export function PublishDrawer(props: Props) {
 	const [tagInput, setTagInput] = useState('');
 	const [uploadError, setUploadError] = useState('');
 	const [uploading, setUploading] = useState(false);
-	const coverInput = useRef<HTMLInputElement | null>(null);
 	const fileInput = useRef<HTMLInputElement | null>(null);
 	const captchaSlot = useRef<HTMLDivElement | null>(null);
 
@@ -135,28 +132,6 @@ export function PublishDrawer(props: Props) {
 		setTagInput('');
 	};
 
-	const uploadCover = async () => {
-		const file = coverInput.current?.files?.[0];
-		if (!file || !bootstrap.media?.uploadUrl?.image) {
-			return;
-		}
-		setUploadError('');
-		setUploading(true);
-		try {
-			const response = await apiUpload(bootstrap.media.uploadUrl.image, file, nonce);
-			const id = Number(response.attachment_id || response.id || 0);
-			const url = String(response.url || '');
-			if (!id || !url) {
-				throw new Error(__('上传后无法读取图片。', 'jio'));
-			}
-			setDraft({ featured: { type: 'image', mediaId: id, data: { id, url } } });
-		} catch (error: any) {
-			setUploadError(String(error?.message || __('上传失败', 'jio')));
-		} finally {
-			setUploading(false);
-		}
-	};
-
 	const uploadAttachment = async () => {
 		const file = fileInput.current?.files?.[0];
 		if (!file) {
@@ -213,36 +188,6 @@ export function PublishDrawer(props: Props) {
 						</p>
 					)}
 
-					<section className="jio-creator-field">
-						<h3>{__('封面', 'jio')}</h3>
-						{draft.featured?.data?.url ? (
-							<div className="jio-creator-cover">
-								<img src={String(draft.featured.data.url)} alt="" />
-								<button
-									type="button"
-									onClick={() => setDraft({ featured: { type: '', data: {} } })}
-									aria-label={__('移除封面', 'jio')}
-								>
-									<i className="fa fas fa-times" aria-hidden="true" />
-								</button>
-							</div>
-						) : capabilities.canUploadImage ? (
-							<label className="jio-creator-cover-empty">
-								<input
-									ref={coverInput}
-									type="file"
-									accept="image/*"
-									onChange={() => void uploadCover()}
-									disabled={uploading}
-								/>
-								<i className="fa fas fa-plus" aria-hidden="true" />
-								<span>{uploading ? __('上传中…', 'jio') : __('上传封面', 'jio')}</span>
-							</label>
-						) : (
-							<p className="jio-creator-muted">{__('当前账号不能设置封面。', 'jio')}</p>
-						)}
-					</section>
-
 					<section className="jio-creator-field">
 						<h3>{__('分类', 'jio')}</h3>
 						<div className="jio-creator-chips">