修复图文发布：创作中心导航、图文标签切换及表单选择器

- 发布前先访问主站建立 session，再跳转创作中心（直接导航会 401）
- 切换「上传图文」标签：跳过 style.left=-9999px 的隐藏副本，不用 getBoundingClientRect
- 修复上传缩略图选择器：.upload-item img → .img-upload-area .img-container
- 修复标题输入框：#note-title → input.d-text[placeholder*="标题"]
- 修复内容编辑器：#note-content → .tiptap.ProseMirror
- 修复发布按钮：.publishBtn → button.d-button:has-text("发布")
- 新增 debug-publish.ts 调试脚本

src/platforms/xiaohongshu/selectors.ts

@@ -134,17 +134,17 @@ export const XHS_SELECTORS = {
     /** The file input element for uploading images on the creator publish page. */
     imageFileInput: 'input[type="file"]',
     /** Title input field on the publish form. */
-    titleInput: '#note-title',
-    /** Content / body editor area on the publish form (contenteditable). */
-    contentEditor: '#note-content',
+    titleInput: 'input.d-text[placeholder*="标题"]',
+    /** Content / body editor area on the publish form (contenteditable ProseMirror). */
+    contentEditor: '.tiptap.ProseMirror',
     /** The tag / topic button that opens the topic input. */
-    tagButton: '#topicBtn',
+    tagButton: 'button.contentBtn.topic-btn',
     /** Tag / topic input field for typing hashtags. */
-    tagInput: '#topicBtn input',
+    tagInput: 'button.contentBtn.topic-btn input',
     /** Topic / hashtag suggestion dropdown item. */
     tagSuggestionItem: '.publish-topic-item, .topic-item',
     /** "Publish" / submit button. */
-    publishButton: '.publishBtn',
+    publishButton: 'button.d-button:has-text("发布")',
     /** Schedule / timing selector button. */
     scheduleButton: '.timing-btn, button:has-text("定时")',
     /** Schedule date/time input field. */
@@ -160,7 +160,7 @@ export const XHS_SELECTORS = {
     /** Visibility option for friends only. */
     visibilityFriends: '.permission-option:has-text("好友"), .visibility-option:has-text("好友")',
     /** Upload complete indicator (images uploaded and thumbnails visible). */
-    uploadedImageItem: '.upload-item img, .img-item img, .image-item img',
+    uploadedImageItem: '.img-upload-area .img-container',
     /** Video upload complete indicator (video thumbnail visible). */
     uploadedVideoItem: '.upload-video video, .video-item video, .video-container video',
     /** Success indicator shown after publish completes. */