[ref] apng typing

src/ts/image.ts

@@ -4,6 +4,7 @@ import { v4 } from "uuid";
 import { DataBase } from "./storage/database";
 import { get } from "svelte/store";
 import { isAPNG } from "./parser";
+import { PngChunk } from "./pngChunk";
 
 const inlayStorage = localforage.createInstance({
     name: 'inlay',
@@ -100,7 +101,7 @@ export function supportsInlayImage(){
 
 export async function reencodeImage(img:Uint8Array){
     if(isAPNG(img)){
-        return img
+        return PngChunk.write(img, {}) as Promise<Buffer>
     }
     const canvas = document.createElement('canvas')
     const imgObj = new Image()