refactor(types): introduce Settings and apply in API

- style(prettier): format src files
- style(rustfmt): format Rust sources
- refactor(tauri-api): type-safe getSettings/saveSettings
- refactor(d.ts): declare window.api with Settings

[skip ci]

src-tauri/src/config.rs

@@ -88,7 +88,6 @@ pub fn archive_file(ts: u64, category: &str, src: &Path) -> Result<Option<PathBu
     Ok(Some(dest))
 }
 
-
 /// 清理供应商名称，确保文件名安全
 pub fn sanitize_provider_name(name: &str) -> String {
     name.chars()