fix: 去掉 saveAs，显示下载位置

web-to-ppt/background.js

@@ -177,12 +177,7 @@ chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
       const stored = await chrome.storage.session.get(['pptxBase64', 'pptxFilename']);
       if (!stored.pptxBase64) throw new Error('没有待下载的数据');
       const dataUrl = 'data:application/vnd.openxmlformats-officedocument.presentationml.presentation;base64,' + stored.pptxBase64;
-      // 先尝试弹出保存对话框，失败则直接下载到默认文件夹
-      try {
-        await chrome.downloads.download({ url: dataUrl, filename: stored.pptxFilename, saveAs: true });
-      } catch (e) {
-        await chrome.downloads.download({ url: dataUrl, filename: stored.pptxFilename });
-      }
+      await chrome.downloads.download({ url: dataUrl, filename: stored.pptxFilename });
       await chrome.storage.session.remove(['pptxBase64', 'pptxFilename']);
       return { ok: true };
     })()

web-to-ppt/popup.js

@@ -95,7 +95,7 @@ async function exportPptx() {
     if (!dlResult || !dlResult.ok) throw new Error(dlResult?.error || '下载失败');
 
     setProgress(100, '导出完成');
-    setResult('success', '导出完成');
+    setResult('success', '已下载到 Downloads/web-to-ppt/');
 
   } catch (error) {
     setProgress(0, error.message || String(error));