chore: 纳入项目全部源码进根仓库统一管理

删除 YouleNexus 内嵌 .git，统一由根仓库唯一管理。提交：
- projects/ 旧 H5 模板 Game_Surface_3 与各子游戏源码
- cocoscreator_projects/YouleNexus 工程 + cocos-creator-mcp 扩展源码
- CLAUDE.md、.mcp.json 等配置
library/temp/node_modules/dist 等缓存由 .gitignore 排除。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

cocoscreator_projects/YouleNexus/extensions/cocos-creator-mcp/test/prefab-test.mjs

@@ -0,0 +1,128 @@
+/**
+ * Prefab保存テスト — プロパティがPrefabに保持されるか検証
+ *
+ * 前提: CocosCreatorでcocos-creator-mcpサーバーが起動中、MainScene開いてる
+ */
+
+const PORT = process.argv[2] || 3001;
+const BASE = `http://127.0.0.1:${PORT}`;
+let rpcId = 0;
+
+async function rpc(method, params = {}) {
+    const res = await fetch(`${BASE}/mcp`, {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ jsonrpc: "2.0", id: ++rpcId, method, params }),
+    });
+    return res.json();
+}
+
+async function callTool(name, args = {}) {
+    const res = await rpc("tools/call", { name, arguments: args });
+    if (res.error) return { _rpcError: res.error };
+    const text = res.result?.content?.[0]?.text;
+    return text ? JSON.parse(text) : res.result;
+}
+
+async function sceneScript(method, args) {
+    // Call execute-scene-script through a raw JSON-RPC (not via tool)
+    // Actually we need to go through the MCP server... let's use node_set_property hack
+    // Or better: add a scene_script tool call
+    // For now, use the existing setComponentProperty that IS registered in scene.ts
+
+    // We can't call execute-scene-script directly from outside.
+    // But we CAN call the node_set_property tool which internally calls setNodeProperty scene script.
+    // For component property, we need a dedicated tool.
+
+    // Workaround: Use curl to call the Editor's Messages API if available
+    return null;
+}
+
+async function main() {
+    console.log("\n🧪 Prefab Property Persistence Test\n");
+
+    // Step 1: Create test node with Label
+    console.log("1. Creating test node with Label...");
+    const created = await callTool("node_create", {
+        name: "PrefabPropertyTest",
+        parent: "83A39G7PtBqLLEoVjvUo4h", // Canvas
+        components: ["cc.Label"],
+    });
+    console.log(`   Node UUID: ${created.uuid}`);
+    const nodeUuid = created.uuid;
+
+    // Step 2: Set position (this should persist)
+    console.log("2. Setting position to (100, 200, 0)...");
+    await callTool("node_set_transform", {
+        uuid: nodeUuid,
+        position: { x: 100, y: 200, z: 0 },
+    });
+
+    // Step 3: Verify position was set
+    const info1 = await callTool("node_get_info", { uuid: nodeUuid });
+    console.log(`   Position: (${info1.data?.position?.x}, ${info1.data?.position?.y})`);
+    console.log(`   Components: ${info1.data?.components?.map(c => c.type).join(", ")}`);
+
+    // Step 4: Try to create prefab via Editor API
+    console.log("3. Attempting to create prefab via Editor.Message...");
+
+    // We'll try the create-prefab scene message
+    // This requires calling: Editor.Message.request("scene", "create-prefab", nodeUuid, url)
+    // Since we don't have a tool for this, let's try different approaches:
+
+    // Approach A: Try "create-prefab" message (3 args: nodeUuid, url, ?)
+    const prefabUrl = "db://assets/test/PrefabPropertyTest.prefab";
+
+    // We need to add this capability. For now, let's check if we can use
+    // asset-db to create an asset
+    console.log(`   Target: ${prefabUrl}`);
+
+    // Actually, let me just check the scene script createPrefabFromNode
+    // which IS registered in package.json scene methods
+    // But wait - our own MCP's scene.ts doesn't have createPrefabFromNode
+
+    console.log("\n⚠️  Prefab creation tool not yet implemented in our MCP.");
+    console.log("   This is what needs to be built for v0.5.\n");
+
+    // Step 5: Test what the Editor API returns for prefab-related messages
+    console.log("4. Probing available prefab-related Editor Messages...");
+
+    const messages = [
+        ["scene", "create-prefab"],
+        ["scene", "save-prefab"],
+        ["asset-db", "create-asset"],
+    ];
+
+    for (const [target, msg] of messages) {
+        try {
+            const res = await fetch(`${BASE}/mcp`, {
+                method: "POST",
+                headers: { "Content-Type": "application/json" },
+                body: JSON.stringify({
+                    jsonrpc: "2.0", id: ++rpcId, method: "tools/call",
+                    params: { name: "node_get_info", arguments: { uuid: "test" } }
+                }),
+            });
+            console.log(`   ${target}:${msg} — needs testing`);
+        } catch (e) {
+            console.log(`   ${target}:${msg} — error: ${e.message}`);
+        }
+    }
+
+    // Cleanup
+    console.log("\n5. Cleaning up test node...");
+    await callTool("node_delete", { uuid: nodeUuid });
+    console.log("   Deleted.\n");
+
+    console.log("═".repeat(50));
+    console.log("  Summary:");
+    console.log("  - Node creation with components: ✅");
+    console.log("  - Position/transform setting: ✅");
+    console.log("  - Component property setting: ❓ (needs component tool)");
+    console.log("  - Prefab creation: ❓ (needs prefab tool)");
+    console.log("  - Property persistence in prefab: ❓ (blocked by above)");
+    console.log("═".repeat(50));
+    console.log("\n→ v0.5 で component + prefab ツール実装後に再検証");
+}
+
+main().catch(e => { console.error("Fatal:", e); process.exit(1); });