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/Layout.ts

@@ -0,0 +1,59 @@
+'use strict';
+export const LAYOUT = {
+    "__type__": "cc.Layout",
+    "_name": "",
+    "_objFlags": 0,
+    "node": null,
+    "_enabled": true,
+    "__prefab": null,
+    "_resizeMode": 0,
+    "_N$layoutType": 0,
+    "_N$padding": 0,
+    "_cellSize": {
+        "__type__": "cc.Size",
+        "width": 40,
+        "height": 40,
+    },
+    "_startAxis": 0,
+    "_paddingLeft": 0,
+    "_paddingRight": 0,
+    "_paddingTop": 0,
+    "_paddingBottom": 0,
+    "_spacingX": 0,
+    "_spacingY": 0,
+    "_verticalDirection": 1,
+    "_horizontalDirection": 0,
+    "_affectedByScale": false,
+};
+
+export class Layout {
+
+    static create() {
+        return JSON.parse(JSON.stringify(LAYOUT));
+    }
+
+    static async migrate(json2D: any) {
+        const source = JSON.parse(JSON.stringify(LAYOUT));
+        for (let key in json2D) {
+            const value = json2D[key];
+            if (key === '__type__' || value === undefined || value === null) { continue; }
+            if (key.startsWith('_N$')) {
+                key = key.replace(/N\$/, '');
+            }
+            if (key === '_padding') {
+                source._paddingLeft = source._paddingRight = source._paddingTop = source._paddingBottom = value;
+            } else if (key === '_resize') {
+                source._resizeMode = value;
+            } else {
+                source[key] = value;
+            }
+        }
+        return source;
+    }
+
+    static async apply(index: number, json2D: any, json3D: any) {
+        const source = await Layout.migrate(json2D[index]);
+        json3D.splice(index, 1, source);
+        return source;
+    }
+}