feat(auto-thumbnail): [PKG-AUTO-THUMB-08] add compatible runtime type entry

packages/artplayer-plugin-auto-thumbnail/src/index.ts

@@ -1,10 +1,11 @@
+import type { Result } from '../types/runtime-api'
 import type { Cleanup, ThumbnailHost, ThumbnailOptions } from './types'
 import extract from './extraction'
 import { readOptions } from './options'
 import createSession, { cleanupAll } from './session'
 
 export default function artplayerPluginAutoThumbnail(option: ThumbnailOptions) {
-  return async (art: ThumbnailHost) => {
+  return async (art: ThumbnailHost): Promise<Result> => {
     const report = (error: unknown) => console.warn('ArtPlayer auto-thumbnail failed:', error)
     const session = createSession((config) => {
       art.thumbnails = config

packages/artplayer-plugin-auto-thumbnail/src/types.ts

@@ -1,11 +1,5 @@
-// Internal contracts only. Public declarations retain their historical entrypoint.
-export interface ThumbnailOptions {
-  url?: string
-  width?: number
-  number?: number
-  scale?: number
-  height?: number
-}
+// Root declarations retain their historical shape; the opt-in runtime view is shared.
+export type { Option as ThumbnailOptions } from '../types/runtime-api'
 
 export interface ExtractionConfig {
   url: string