Prevent text selection and restrict globe/camera controls

Disable copy, cut, and context menu site-wide, and limit Cesium
camera input to left-drag rotation and wheel zoom only. Also speed
up page flip animation from 1.3s to 0.6s with an ease-out curve for
a snappier feel.

src/main.js

@@ -1,5 +1,10 @@
 import { App } from './core/App.js';
 
+// 全站禁止复制/剪切/右键菜单（配合 CSS user-select: none 禁止选中）
+for (const ev of ['copy', 'cut', 'contextmenu']) {
+  document.addEventListener(ev, (e) => e.preventDefault());
+}
+
 // 启动应用
 const app = new App();
 window.__app = app; // 便于调试