feat: persist Tauri window state (#2377)

Add the window-state plugin and explicitly save size and position across app exit, restart, and lightweight-mode transitions.

src-tauri/Cargo.lock

@@ -785,6 +785,7 @@ dependencies = [
  "tauri-plugin-single-instance",
  "tauri-plugin-store",
  "tauri-plugin-updater",
+ "tauri-plugin-window-state",
  "tempfile",
  "thiserror 2.0.18",
  "tokio",
@@ -5687,6 +5688,21 @@ dependencies = [
  "zip 4.6.1",
 ]
 
+[[package]]
+name = "tauri-plugin-window-state"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73736611e14142408d15353e21e3cca2f12a3cfb523ad0ce85999b6d2ef1a704"
+dependencies = [
+ "bitflags 2.11.0",
+ "log",
+ "serde",
+ "serde_json",
+ "tauri",
+ "tauri-plugin",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "2.10.1"

src-tauri/Cargo.toml

@@ -35,6 +35,7 @@ tauri-plugin-updater = "2"
 tauri-plugin-dialog = "2"
 tauri-plugin-store = "2"
 tauri-plugin-deep-link = "2"
+tauri-plugin-window-state = "2"
 dirs = "5.0"
 toml = "0.8"
 toml_edit = "0.22"

src-tauri/src/commands/settings.rs

@@ -42,6 +42,8 @@ pub async fn save_settings(settings: crate::settings::AppSettings) -> Result<boo
 /// 重启应用程序（当 app_config_dir 变更后使用）
 #[tauri::command]
 pub async fn restart_app(app: AppHandle) -> Result<bool, String> {
+    crate::save_window_state_before_exit(&app);
+
     // 在后台延迟重启，让函数有时间返回响应
     tauri::async_runtime::spawn(async move {
         tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;

src-tauri/src/lib.rs

@@ -64,6 +64,7 @@ use tauri::image::Image;
 use tauri::tray::{TrayIconBuilder, TrayIconEvent};
 use tauri::RunEvent;
 use tauri::{Emitter, Manager};
+use tauri_plugin_window_state::{AppHandleExt, StateFlags};
 
 fn redact_url_for_log(url_str: &str) -> String {
     match url::Url::parse(url_str) {
@@ -264,6 +265,7 @@ pub fn run() {
                         tray::apply_tray_policy(window.app_handle(), false);
                     }
                 } else {
+                    api.prevent_close();
                     window.app_handle().exit(0);
                 }
             }
@@ -272,6 +274,11 @@ pub fn run() {
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_opener::init())
         .plugin(tauri_plugin_store::Builder::new().build())
+        .plugin(
+            tauri_plugin_window_state::Builder::default()
+                .with_state_flags(window_state_flags())
+                .build(),
+        )
         .setup(|app| {
             let _ = rustls::crypto::ring::default_provider().install_default();
 
@@ -1351,6 +1358,7 @@ pub fn run() {
 
             let app_handle = app_handle.clone();
             tauri::async_runtime::spawn(async move {
+                save_window_state_before_exit(&app_handle);
                 cleanup_before_exit(&app_handle).await;
                 log::info!("清理完成，退出应用");
 
@@ -1757,3 +1765,21 @@ fn show_database_init_error_dialog(
         ))
         .blocking_show()
 }
+
+// ============================================================
+// 在应用主动退出前显式持久化窗口状态
+// ============================================================
+
+fn window_state_flags() -> StateFlags {
+    StateFlags::POSITION | StateFlags::SIZE | StateFlags::MAXIMIZED
+}
+
+/// 当前应用的退出路径会拦截 `ExitRequested` 并最终直接 `std::process::exit(0)`，
+/// 这里需要在真正结束进程前手动落盘，避免 window-state 插件的默认退出钩子被绕过。
+pub fn save_window_state_before_exit(app_handle: &tauri::AppHandle) {
+    if let Err(err) = app_handle.save_window_state(window_state_flags()) {
+        log::error!("退出前保存窗口状态失败: {err}");
+    } else {
+        log::info!("已在退出前保存窗口状态");
+    }
+}

src-tauri/src/lightweight.rs

@@ -17,6 +17,7 @@ pub fn enter_lightweight_mode(app: &tauri::AppHandle) -> Result<(), String> {
     }
 
     if let Some(window) = app.get_webview_window("main") {
+        crate::save_window_state_before_exit(app);
         window
             .destroy()
             .map_err(|e| format!("销毁主窗口失败: {e}"))?;
@@ -64,11 +65,12 @@ pub fn exit_lightweight_mode(app: &tauri::AppHandle) -> Result<(), String> {
 
     WebviewWindowBuilder::from_config(app, window_config)
         .map_err(|e| format!("加载主窗口配置失败: {e}"))?
-        .visible(true)
         .build()
         .map_err(|e| format!("创建主窗口失败: {e}"))?;
 
     if let Some(window) = app.get_webview_window("main") {
+        let _ = window.unminimize();
+        let _ = window.show();
         let _ = window.set_focus();
         #[cfg(target_os = "linux")]
         {