chore(spec): 综合清理 + legacy-layer 迁移 spec/plan/data

主要改动:
- 切到 funplay-cocos-mcp v0.5.1 (用户级配置, 项目级 .mcp.json 删除)
- 仓库文档/CLAUDE.md/.gitignore 等清理过时 cocos-mcp-server 引用
- memory 文件同步: cocos-mcp-setup/path/blocker/spriteframe-uuid/prefab-persist 等加 funplay 实测警告
- memory 新建 funplay-cocos-mcp-pending-verification.md (后已被实测覆盖)
- spec/plan/data:
  - docs/superpowers/specs/2026-09-02-legacy-layer-migration-design.md
  - docs/superpowers/plans/2026-09-02-legacy-layer-migration.md
  - docs/superpowers/data/layer-spirit-summary.json
- YouleNexus: profiles.ts / defaults.ts / PlayerInfoView.prefab / scene 改动

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

cocoscreator_projects/scripts/ui-migration/convert.mjs

@@ -1,5 +1,5 @@
 import {
-  DESIGN_WIDTH, DESIGN_HEIGHT,
+  DESIGN_WIDTH, DESIGN_HEIGHT, CANVAS_WIDTH, CANVAS_HEIGHT,
   toCocosPosition, inferWidget, stretchWidget, isFullScreen, isOffscreen,
 } from './coords.mjs';
 import { frameFileName, padWidth } from './frames.mjs';
@@ -146,8 +146,12 @@ export function convertAll(source) {
 
   const manifest = {
     generatedBy: 'scripts/convert-ui.mjs',
+    // 内容区基准（旧数据事实），坐标/三区据此判定，不随设计分辨率改变。
     designWidth: DESIGN_WIDTH,
     designHeight: DESIGN_HEIGHT,
+    // 设计分辨率画布（20:9），落地 Layer/Group 根节点尺寸据此设定。
+    canvasWidth: CANVAS_WIDTH,
+    canvasHeight: CANVAS_HEIGHT,
     layers: layers.map((d) => ({
       layerId: d.layerId,
       name: d.name,