feat: 跨平台持久化与版本管理优化

- Cookie 存储从 temp_dir 迁移至 Tauri app_data_dir，兼容 Linux
- 简单统一风格，UI优化
- recentLocal 播放历史持久化到 localStorage
- 添加设置界面可以修改简单的设置

src/utils/format.ts

@@ -0,0 +1,20 @@
+export function formatDuration(ms: number): string {
+  const sec = Math.floor(ms / 1000);
+  const m = Math.floor(sec / 60);
+  const s = sec % 60;
+  return `${m}:${s.toString().padStart(2, '0')}`;
+}
+
+export function formatTime(sec: number): string {
+  if (!sec || isNaN(sec)) return '0:00';
+  const m = Math.floor(sec / 60);
+  const s = Math.floor(sec % 60);
+  return `${m}:${s.toString().padStart(2, '0')}`;
+}
+
+export function formatPlayCount(count: number): string {
+  if (!count) return '0';
+  if (count >= 100000000) return (count / 100000000).toFixed(1) + '亿';
+  if (count >= 10000) return (count / 10000).toFixed(1) + '万';
+  return count.toString();
+}