diff --git a/CHANGELOG.md b/CHANGELOG.md
index 071bbff..207704f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,11 @@
+# v0.4.50 (2026-05-16)
+
+## Fixes
+- Fix duplicate tray icon on macOS when hiding to tray
+- Fix tray not showing in background mode on macOS
+- Fix hide to tray broken on Windows/Linux
+- Fix Shutdown button in web UI not working
+
 # v0.4.49 (2026-05-16)
 
 ## Features
diff --git a/cli/cli.js b/cli/cli.js
index a049c09..06cd979 100755
--- a/cli/cli.js
+++ b/cli/cli.js
@@ -694,29 +694,48 @@ function startServer(latestVersion) {
           await startTerminalUI(port);
           // Loop continues, show menu again
         } else if (choice === "hide") {
-          // Hide to tray: keep the CURRENT process alive (it already owns a
-          // macOS GUI session so NSStatusItem works). Spawning a detached child
-          // puts it outside the login session → systray silently fails on macOS.
           const { clearScreen } = require("./src/cli/utils/display");
           clearScreen();
 
-          // Survive terminal close — SIGHUP is sent when the launching shell exits
-          process.removeAllListeners("SIGHUP");
-          process.on("SIGHUP", () => {});
-
           // Enable auto startup on OS boot
           try {
             const { enableAutoStart } = require("./src/cli/tray/autostart");
             enableAutoStart(__filename);
           } catch (e) { }
 
-          console.log(`\n🔔 9Router is running in tray (PID: ${process.pid})`);
+          if (process.platform === "darwin") {
+            // macOS: keep current process alive — spawning a detached child puts
+            // it outside the login session so NSStatusItem silently fails.
+            process.removeAllListeners("SIGHUP");
+            process.on("SIGHUP", () => {});
+
+            console.log(`\n⏳ Switching to tray mode... (icon already visible in menu bar)`);
+            console.log(`🔔 9Router is running in tray (PID: ${process.pid})`);
+            console.log(`   Server: http://${displayHost}:${port}`);
+            console.log(`\n💡 You can close this terminal. Right-click tray icon to quit.\n`);
+
+            // Tray already init'd at startup — just keep event loop alive.
+            return;
+          }
+
+          // Windows/Linux: spawn detached bgProcess (systray works fine in child)
+          console.log(`\n⏳ Starting background process... (tray icon will appear in ~3s)`);
+
+          const bgProcess = spawn(process.execPath, [__filename, "--tray", "--skip-update", "-p", port.toString()], {
+            detached: true,
+            stdio: "ignore",
+            windowsHide: true,
+            env: { ...process.env }
+          });
+          bgProcess.unref();
+
+          console.log(`🔔 9Router is now running in background (PID: ${bgProcess.pid})`);
           console.log(`   Server: http://${displayHost}:${port}`);
           console.log(`\n💡 You can close this terminal. Right-click tray icon to quit.\n`);
 
-          // Tray icon already running (initTrayIcon was called above at startup).
-          // Nothing more to do — event loop keeps process alive via tray + server.
-          return;
+          // cleanup() kills server so bgProcess can claim the port fresh
+          cleanup();
+          process.exit(0);
         } else if (choice === "exit") {
           isShuttingDown = true;
           console.log("\nExiting...");
diff --git a/cli/package.json b/cli/package.json
index b244149..e7bd1c1 100644
--- a/cli/package.json
+++ b/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "9router",
-  "version": "0.4.49",
+  "version": "0.4.50",
   "description": "9Router CLI - Start and manage 9Router server",
   "bin": {
     "9router": "./cli.js"
diff --git a/package.json b/package.json
index b468d5e..585d487 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "9router-app",
-  "version": "0.4.49",
+  "version": "0.4.50",
   "description": "9Router web dashboard",
   "private": true,
   "scripts": {
diff --git a/public/i18n/literals/vi.json b/public/i18n/literals/vi.json
index 9ca42c4..1b03b6e 100644
--- a/public/i18n/literals/vi.json
+++ b/public/i18n/literals/vi.json
@@ -98,13 +98,13 @@
   "Console Log": "Nhật ký Console",
   "System": "Hệ thống",
   "Debug": "Gỡ lỗi",
-  "Shutdown": "Tắt máy",
+  "Shutdown": "Tắt ứng dụng",
   "Close Proxy": "Đóng Proxy",
   "Are you sure you want to close the proxy server?": "Bạn có chắc chắn muốn đóng máy chủ proxy không?",
   "Server Disconnected": "Máy chủ đã ngắt kết nối",
   "The proxy server has been stopped.": "Máy chủ proxy đã bị dừng.",
   "Reload Page": "Tải lại trang",
-  "Service is running in terminal. You can close this web page. Shutdown will stop the service.": "Dịch vụ đang chạy trong terminal. Bạn có thể đóng trang web này. Tắt máy sẽ dừng dịch vụ.",
+  "Service is running in terminal. You can close this web page. Shutdown will stop the service.": "Dịch vụ đang chạy trong terminal. Bạn có thể đóng trang web này. Tắt ứng dụng sẽ dừng dịch vụ.",
   "Manage your AI provider connections": "Quản lý kết nối nhà cung cấp AI của bạn",
   "Model combos with fallback": "Kết hợp mô hình với dự phòng",
   "Monitor your API usage, token consumption, and request logs": "Theo dõi việc sử dụng API, tiêu thụ token và nhật ký yêu cầu",
diff --git a/src/shared/components/Sidebar.js b/src/shared/components/Sidebar.js
index bec3a63..4dc3e66 100644
--- a/src/shared/components/Sidebar.js
+++ b/src/shared/components/Sidebar.js
@@ -109,7 +109,7 @@ export default function Sidebar({ onClose }) {
   const handleShutdown = async () => {
     setIsShuttingDown(true);
     try {
-      await fetch("/api/shutdown", { method: "POST" });
+      await fetch("/api/version/shutdown", { method: "POST" });
     } catch (e) {
       // Expected to fail as server shuts down; ignore error
     }