修复了chat中图片显示的相关问题

src/components/chatui.vue

@@ -240,9 +240,8 @@ watch(() => props.messages, async () => {
             if (!imgDownloadingQueue.includes(msg.msg)) {
                 imgDownloadingQueue.push(msg.msg)
                 const imgData = await downloadImage(msg.msg)
-                const url = URL.createObjectURL(new Blob([imgData]))
+                const url = URL.createObjectURL(new Blob([imgData], { type: "image/png" }))
                 imgUrlCache.value[msg.msg] = url
-                // console.log(new Blob(imgData), imgData, url, imgUrlCache.value, imgDownloadingQueue)
             }
         } else if (msg.type1 === 'file') {
             if (!getFileInfoQueue.includes(msg.msg)) {