Complete Cocos Creator port with level bundles, themes, and tooling.

Adds level prefabs, theme assets, audio, extensions, and deployment scripts for the Unity WebGL migration.

Co-authored-by: Cursor <cursoragent@cursor.com>

extensions/plugin-import-2x/creator/components/TextureCube.ts

@@ -0,0 +1,31 @@
+'use strict';
+export const TEXTURECUBE = {
+    "__type__": "cc.TextureCube",
+    "content": {
+        "base": "2,2,0,0,0,8",
+        "mipmaps": [],
+    },
+};
+
+export class TextureCube {
+
+    static create() {
+        return JSON.parse(JSON.stringify(TEXTURECUBE));
+    }
+
+    static async migrate(json2D: any) {
+        const source = JSON.parse(JSON.stringify(TEXTURECUBE));
+        for (const key in json2D) {
+            const value = json2D[key];
+            if (key === '__type__' || value === undefined || value === null) { continue; }
+            source[key] = value;
+        }
+        return source;
+    }
+
+    static async apply(index: number, json2D: any, json3D: any) {
+        const source = await TextureCube.migrate(json2D[index]);
+        json3D.splice(index, 1, source);
+        return source;
+    }
+}