fix(prefab): 修复预制体编辑模式的保存与退出，使用原生 scene://edit-mode 接口替代无效的 IPC 广播，更新相关使用文档与安全规定

memory/constitution.md

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+# Project Constitution
+
+## Article I: The Artifact Mandate
+**Agents shall not perform work without a visible Artifact.**
+- Every planning step must produce a Markdown Artifact (Plan, Spec, or Checklist).
+- Never rely on "chat memory" alone. If it's important, write it to a file.
+
+## Article II: Vision Verification
+**Trust but Verify (Visually).**
+- When implementing UI, the Agent MUST take a screenshot using the integrated Browser.
+- Compare the screenshot to the original requirement/mockup.
+- If pixels don't match, the task is incomplete.
+
+## Article III: Agent Independence
+**Build for Parallelism.**
+- Tasks must be atomic.
+- Frontend agents should mock API responses if the Backend agent isn't finished.
+- Never block a thread waiting for another agent.
+
+## Article IV: Code Health
+- **No Legacy Patterns**: Use modern syntax (e.g., React Hooks, ES6+, Python 3.12+).
+- **Self-Correction**: If a test fails, attempt to fix it *once* before asking the user.