spine连接器和导出修改

scripts/verify-loop-seam.mjs

@@ -0,0 +1,35 @@
+import { build } from 'esbuild'
+
+const bundled = await build({
+  bundle: true,
+  entryPoints: ['src/core/loopFrameBaker.ts'],
+  format: 'esm',
+  platform: 'node',
+  treeShaking: true,
+  write: false,
+})
+const source = bundled.outputFiles[0].text
+const moduleUrl = `data:text/javascript;base64,${Buffer.from(source).toString('base64')}`
+const { closeLoopFrameSeam } = await import(moduleUrl)
+
+const first = [{
+  boneName: 'p_0', spawnId: 7, x: 12, y: -4, rotation: 30,
+  scaleX: 1.2, scaleY: 0.8, alpha: 0.75, colorHex: 0xffcc00,
+  resourceId: 1, imageFrameIndex: 2, imageVisible: true, active: true,
+  trailState: {
+    bones: [{ boneName: 'trail_0', x: 1, y: 2, rotation: 3 }],
+    activeBoneCount: 1, width: 5, alpha: 0.5, colorHex: 0xffffff, resourceId: 1,
+  },
+}]
+const frames = [first, [{ ...first[0], spawnId: 99, x: 200, y: 300 }]]
+
+closeLoopFrameSeam(frames)
+
+if (JSON.stringify(frames[0]) !== JSON.stringify(frames[1])) {
+  throw new Error('循环尾帧没有与首帧保持完全一致')
+}
+if (frames[0] === frames[1] || frames[0][0] === frames[1][0] || frames[0][0].trailState === frames[1][0].trailState) {
+  throw new Error('循环闭合帧必须是深拷贝，不能共享可变状态')
+}
+
+console.log('循环持续：首尾粒子身份、变换、生命周期表现及拖尾状态完全一致')