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/MotionStreak.ts

@@ -0,0 +1,63 @@
+'use strict';
+import { getBlendFactor2DTo3D } from "../common/utlis";
+import { ImporterBase } from "../common/base";
+
+export const MOTIONSTREAK = {
+    "__type__": "cc.MotionStreak",
+    "_name": "",
+    "_objFlags": 0,
+    "node": null,
+    "_enabled": true,
+    "__prefab": null,
+    "_materials": [],
+    "_visFlags": 0,
+    "_srcBlendFactor": 2,
+    "_dstBlendFactor": 4,
+    "_color": {
+        "__type__": "cc.Color",
+        "r": 255,
+        "g": 255,
+        "b": 255,
+        "a": 255,
+    },
+    "_preview": false,
+    "_fadeTime": 1,
+    "_minSeg": 1,
+    "_stroke": 64,
+    "_texture": null,
+    "_fastMode": false,
+};
+
+export class MotionStreak {
+
+    static create() {
+        return JSON.parse(JSON.stringify(MOTIONSTREAK));
+    }
+
+    static async migrate(json2D: any) {
+        const source = JSON.parse(JSON.stringify(MOTIONSTREAK));
+        for (const key in json2D) {
+            const value = json2D[key];
+            if (key === '__type__' || value === undefined || value === null) { continue; }
+            if (key === '_srcBlendFactor') {
+                source._srcBlendFactor = getBlendFactor2DTo3D(value);
+            } else if (key === '_dstBlendFactor') {
+                source._dstBlendFactor = getBlendFactor2DTo3D(value);
+            } else if (key === '_texture') {
+                source._texture = {
+                    __uuid__: await ImporterBase.getUuid(value.__uuid__, 'texture'),
+                };
+            }
+            else {
+                source[key] = value;
+            }
+        }
+        return source;
+    }
+
+    static async apply(index: number, json2D: any, json3D: any) {
+        const source = await MotionStreak.migrate(json2D[index]);
+        json3D.splice(index, 1, source);
+        return source;
+    }
+}