fix(ui): GUI button inline same row + same height as Synth/File/FX in TCP

src-tauri/src/lib.rs

@@ -15,9 +15,15 @@ use tauri_plugin_dialog::{DialogExt, FilePath};
 use tauri_plugin_shell::process::{CommandChild, CommandEvent};
 use tauri_plugin_shell::ShellExt;
 use std::path::{Path, PathBuf};
+use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Mutex;
 
 mod shm;
+
+/// App đang tắt (cửa sổ chính đã Destroyed) — pump thread phải dừng ngay,
+/// không respawn bridge mới sau khi sidecar đã bị giết (fix: app còn sống
+/// sau khi đóng window → pump thấy stall 3s → spawn bridge mới → orphan).
+static SHUTTING_DOWN: AtomicBool = AtomicBool::new(false);
 use shm::{Shm, ShmState};
 
 struct EngineProcess(Mutex<Option<CommandChild>>);
@@ -356,6 +362,10 @@ pub fn run() {
                 let mut down_emitted = false;
                 let mut restart_attempts = 0u32;
                 loop {
+                    // App đang tắt (window Destroyed) — dừng pump, không respawn bridge.
+                    if SHUTTING_DOWN.load(Ordering::Relaxed) {
+                        break;
+                    }
                     let state = pump_handle.state::<ShmState>();
                     let guard = match state.0.lock() {
                         Ok(g) => g,
@@ -385,6 +395,10 @@ pub fn run() {
                             AudioFrame { l: l.to_vec(), r: r.to_vec() },
                         );
                     } else if last_change.elapsed() >= std::time::Duration::from_secs(3) && !down_emitted {
+                        // Check lai truoc khi respawn — Destroyed co the vua set flag.
+                        if SHUTTING_DOWN.load(Ordering::Relaxed) {
+                            break;
+                        }
                         down_emitted = true;
                         if restart_attempts == 0 {
                             restart_attempts += 1;
@@ -483,6 +497,8 @@ pub fn run() {
         .on_window_event(|window, event| {
             // Terminate sidecar khi DAW window dong — tranh orphan process
             if let tauri::WindowEvent::Destroyed = event {
+                // Dung pump thread: khong respawn bridge sau khi sidecar da bi giet.
+                SHUTTING_DOWN.store(true, Ordering::Relaxed);
                 let child = window
                     .state::<EngineProcess>()
                     .0
@@ -506,6 +522,12 @@ pub fn run() {
                     let _ = child.kill();
                     println!("daw_vst_bridge sidecar terminated.");
                 }
+                // Cua so chinh da dong — ep app thoat han. Neu con window
+                // phu/an giu event loop song, Tauri khong tu exit; exit(0)
+                // ket thuc dut diem (pump da dung, khong con respawn bridge).
+                if window.label() == "main" {
+                    window.app_handle().exit(0);
+                }
             }
         })
         .run(tauri::generate_context!())