feat: add minimize to system tray option

Add ability to minimize Hikari to the system tray when closing the window
instead of fully exiting. When enabled, clicking the close button hides
the window and shows a tray icon with "Show Hikari" and "Quit" options.

- Add tray module with system tray setup and menu handling
- Add minimize_to_tray config option in settings
- Handle window close event to hide instead of close when enabled
- Add tray icon click handler to restore window

src-tauri/src/lib.rs

@@ -5,6 +5,7 @@ mod config;
 mod notifications;
 mod stats;
 mod temp_manager;
+mod tray;
 mod types;
 mod vbs_notification;
 mod windows_toast;
@@ -15,7 +16,9 @@ use bridge_manager::create_shared_bridge_manager;
 use commands::load_saved_achievements;
 use commands::*;
 use notifications::*;
+use tauri::Manager;
 use temp_manager::create_shared_temp_manager;
+use tray::{setup_tray, should_minimize_to_tray};
 use vbs_notification::*;
 use windows_toast::*;
 use wsl_notifications::*;
@@ -47,6 +50,27 @@ pub fn run() {
                 }
             }
 
+            // Set up system tray
+            if let Err(e) = setup_tray(app.handle()) {
+                eprintln!("Failed to set up system tray: {}", e);
+            }
+
+            // Handle window close event for minimize to tray
+            let main_window = app.get_webview_window("main").unwrap();
+            main_window.on_window_event({
+                let app_handle = app.handle().clone();
+                move |event| {
+                    if let tauri::WindowEvent::CloseRequested { api, .. } = event {
+                        if should_minimize_to_tray(&app_handle) {
+                            api.prevent_close();
+                            if let Some(window) = app_handle.get_webview_window("main") {
+                                let _ = window.hide();
+                            }
+                        }
+                    }
+                }
+            });
+
             Ok(())
         })
         .invoke_handler(tauri::generate_handler![