fix: align promise helper types and test playback rejections

docs/assets/ts/artplayer.d.ts

@@ -43,6 +43,7 @@ export interface Utils {
   loadImg: (url: string, scale?: number) => Promise<HTMLImageElement>
 
   errorHandle: <T extends boolean>(condition: T, msg: string) => T extends true ? T : never
+  silencePromise: <T>(value: T) => T extends Promise<infer R> ? Promise<R | undefined> : T
   def: (obj: object, name: string, value: unknown) => void
   has: (obj: object, name: PropertyKey) => boolean
   get: (obj: object, name: PropertyKey) => PropertyDescriptor | undefined
@@ -1251,7 +1252,7 @@ export default class Artplayer extends Player {
 
   readonly notice: {
     timer: number | null
-    get show(): boolean
+    get show(): string | Error | false | ''
     set show(msg: string | Error | false | '')
     destroy: () => void
   }