Web app: 3D mouse navigation through the Gamepad API (#1473)

The web app reads a 3D mouse through the Gamepad API and drives the camera through navigation::device, so it follows each page's navigation capabilities (#1336).

Co-authored-by: CamWight <CamWight@users.noreply.github.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

assets/locales/zh.json

@@ -344,7 +344,7 @@
   "sketch.make_selection": "将选择转换为 {linetype}",
   "ui.1_degree_of_freedom": "1 个自由度",
   "ui.3d_mouse_speed": "3D 鼠标速度",
-  "ui.3d_mouse_windows": "3D 鼠标（Windows）",
+  "ui.3d_mouse_windows": "3D 鼠标",
   "ui.3d_sketch": "3D 草图",
   "ui.about": "关于",
   "ui.activate": "激活",