接上一轮，按接续文件继续执行

结论：Three.js 程序预览和刀具执行显示已收口，公网 HTTP/IP 下 Save/Restore Session 已支持 memory-fallback 降级并通过 node/browser gate。

web-rtcp-5axis-sim-plan/tests/node/verify_five_axis_session.mjs

@@ -49,6 +49,8 @@ const storage = createMemorySessionStorage();
 const saved = await store.saveSession({ storage });
 assert.equal(saved.snapshot.format, "web-rtcp-5axis-session-snapshot");
 assert.equal(saved.path, "web-rtcp-5axis-sim-plan/sessions/gmoccapy-web-session/web-rtcp-5axis-session.json");
+assert.equal(saved.storageMode, "memory");
+assert.equal(store.getState().sessionPersistence.storageMode, "memory");
 
 store.dispatch({ type: "SET_RTCP", enabled: false });
 store.dispatch({ type: "STOP" });
@@ -60,7 +62,9 @@ assert.notEqual(store.getState().axisPose.x, beforeSave.axisPose.x);
 const restored = await store.restoreSession({ storage });
 const afterRestore = store.getState();
 assert.equal(restored.path, saved.path);
+assert.equal(restored.storageMode, "memory");
 assert.equal(afterRestore.sessionPersistence.status, "restored");
+assert.equal(afterRestore.sessionPersistence.storageMode, "memory");
 assert.equal(afterRestore.rtcpState, beforeSave.rtcpState);
 assert.equal(afterRestore.kinsType, beforeSave.kinsType);
 assert.equal(afterRestore.axisPose.x, beforeSave.axisPose.x);