优化保存方式

TODO.md

@@ -17,6 +17,5 @@
 
 ---
 
-- [ ] 使用Reducer 和 Immer重构代码
+- [ ] 整理、重构代码
 - [ ] 添加测试用例
-- [ ] 体验调优：生成配置完成后弹出预览窗口可以下载或者复制

src/App.tsx

@@ -168,12 +168,48 @@ function FlowContent(): ReactNode {
 
       const json = instanceToPlain(saveConfig);
       const blob = new Blob([JSON.stringify(json, null, 2)], { type: 'application/json' });
+      const lastNameKey = 'wg-last-filename';
+      const suggestedName = (localStorage.getItem(lastNameKey) || 'wg-config.json');
+
+      // Use File System Access API when available to show save file picker
+      if ((window as any).showSaveFilePicker) {
+        try {
+          const handle = await (window as any).showSaveFilePicker({
+            suggestedName: suggestedName,
+            types: [{
+              description: 'WireGuard Config',
+              accept: { 'application/json': ['.json'] }
+            }]
+          });
+          const writable = await handle.createWritable();
+          await writable.write(blob);
+          await writable.close();
+          // remember chosen name if available
+          try {
+            const name = handle.name || suggestedName;
+            localStorage.setItem(lastNameKey, name);
+          } catch (e) {
+            localStorage.setItem(lastNameKey, suggestedName);
+          }
+        } catch (e) {
+          // If user cancels or error, fallback to anchor download
           const url = URL.createObjectURL(blob);
           const a = document.createElement('a');
           a.href = url;
-      a.download = 'wg-config.json';
+          a.download = suggestedName;
           a.click();
           URL.revokeObjectURL(url);
+        }
+      } else {
+        // Fallback: create an anchor and trigger download, using last used filename
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = suggestedName;
+        a.click();
+        URL.revokeObjectURL(url);
+        localStorage.setItem(lastNameKey, suggestedName);
+      }
     } catch (e) {
       toast.error('保存失败: ' + e);
     }