feat(editor): route slash-command image upload through coordinator

- slash-command.ts: SlashCommandOptions 加 onInsertUploading option
- slash-command.ts: 上传图片命令优先走 onInsertUploading(coordinator 占位符+上传),
  退回 uploadFn 直接上传(无占位符)
- index.ts: SlashCommand.configure 注入 onInsertUploading,
  闭包延迟读取 this.coordinator(在 editor 创建后才实例化)

libs/tiptap-editor/src/index.ts

@@ -87,8 +87,12 @@ class TiptapEditorInstance {
         TaskList,
         TaskItem.configure({ nested: true }),
         // 把宿主注入的图片上传回调透传给斜杠命令扩展，使 /上传图片 命令可用。
+        // 注意：闭包延迟读取 this.coordinator（它在 editor 创建后才实例化）。
         SlashCommand.configure({
           onImageUpload: this.options.onImageUpload,
+          onInsertUploading: this.options.onImageUpload
+            ? (file) => this.coordinator?.insertUploading(file)
+            : undefined,
         }),
         FileHandler.configure({
           allowedMimeTypes: ['image/jpeg', 'image/png', 'image/gif', 'image/webp'],

libs/tiptap-editor/src/slash-command.ts

@@ -18,6 +18,8 @@ interface CommandItem {
  */
 export interface SlashCommandOptions {
   onImageUpload?: (file: File) => Promise<string>
+  /** 由 index.ts 注入：直接调 coordinator.insertUploading（走占位符 + 上传）。 */
+  onInsertUploading?: (file: File) => void
 }
 
 const SlashCommandPluginKey = new PluginKey('slashCommand')
@@ -33,6 +35,7 @@ export const SlashCommand = Extension.create<SlashCommandOptions>({
   addOptions() {
     return {
       onImageUpload: undefined,
+      onInsertUploading: undefined,
     }
   },
 
@@ -137,6 +140,10 @@ export const SlashCommand = Extension.create<SlashCommandOptions>({
           input.addEventListener('change', () => {
             const file = input.files?.[0]
             if (!file) return
+            // 优先走 coordinator（占位符 + 上传），否则退回直接上传（无占位符）
+            if (this.options.onInsertUploading) {
+              this.options.onInsertUploading(file)
+            } else if (uploadFn) {
               uploadFn(file)
                 .then((url) => {
                   editor.chain().focus().setImage({ src: url }).run()
@@ -145,6 +152,7 @@ export const SlashCommand = Extension.create<SlashCommandOptions>({
                   const msg = err instanceof Error ? err.message : String(err)
                   console.error('[SlashCommand] Upload failed:', msg)
                 })
+            }
           })
           // click() 会立即触发原生文件选择器；回调在用户选择文件后异步执行。
           input.click()