feat: 支持自定义 Minecraft 窗口标题

全局开关 + 默认标题，实例可覆盖；Win32 重命名窗口。前端设置页同步。

apps/app-frontend/src/locales/en-US/index.json

@@ -11431,5 +11431,29 @@
   },
   "app.anniversary.banner": {
     "message": "Happy {ordinal} Anniversary, Starlight!"
+  },
+  "instance.settings.tabs.window.window-title": {
+    "message": "Window title"
+  },
+  "instance.settings.tabs.window.window-title.description": {
+    "message": "Customize the Minecraft window title. Leave empty to keep the default."
+  },
+  "instance.settings.tabs.window.window-title.enter": {
+    "message": "Enter window title..."
+  },
+  "app.settings.defaults.window-title.enabled": {
+    "message": "Custom Minecraft window title"
+  },
+  "app.settings.defaults.window-title.enabled-description": {
+    "message": "Allow instances to customize the Minecraft window title."
+  },
+  "app.settings.defaults.window-title.default": {
+    "message": "Default window title"
+  },
+  "app.settings.defaults.window-title.default-description": {
+    "message": "Used when an instance does not provide its own title."
+  },
+  "app.settings.defaults.window-title.default-placeholder": {
+    "message": "Enter the default window title..."
   }
 }