diff --git a/static/js/thinking.js b/static/js/thinking.js
index 6992129..227a3cf 100644
--- a/static/js/thinking.js
+++ b/static/js/thinking.js
@@ -676,6 +676,10 @@
 
                 if (data.passed) {
                     showNotification('🎉 思路描述通过！进入积木编程阶段', 'success');
+                    // 后端此刻已把会话推进到阶段二。同步一次生命周期，
+                    // 让“服务器观察时间/下一步”在切换时刷新，而不是停在
+                    // 会话创建时的快照（0分0秒、下一步指向阶段一）。
+                    refreshSessionLifecycle({ announce: false }).catch(() => {});
                     setTimeout(() => initStage(2), 1500);
                 } else {
                     // Proactively post AI Companion guidance
diff --git a/tests/test_lifecycle_refresh_stage1_pass.py b/tests/test_lifecycle_refresh_stage1_pass.py
new file mode 100644
index 0000000..77f6d85
--- /dev/null
+++ b/tests/test_lifecycle_refresh_stage1_pass.py
@@ -0,0 +1,50 @@
+"""Regression: the lifecycle lamp must refresh when stage 1 is passed.
+
+During a real guided-learning run the "学习会话状态" strip is populated once
+at ``start_session`` and otherwise only by the manual 同步状态 button or a
+tab-visibility change. After stage 1 is submitted and passed, the backend has
+already moved the session to stage 2, but the strip keeps the session-start
+snapshot: 服务器观察时间 frozen at 0分0秒 and 下一步 still pointing at the
+stage-1 description. A student entering stage 2 is shown a backward state.
+
+The existing read-only endpoint ``/thinking/api/session/<id>/status`` already
+returns a fresh lifecycle, and ``refreshSessionLifecycle()`` already renders
+it without reloads/redirects. The missing piece is one call at the stage-1
+pass branch -- wiring an existing lamp, not a new mechanism.
+
+Stdlib only (mirrors tests/test_session_lifecycle_ui.py): no Flask,
+database/Redis, or application startup.
+"""
+from pathlib import Path
+
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+THINKING_JS = (PROJECT_ROOT / "static" / "js" / "thinking.js").read_text(
+    encoding="utf-8"
+)
+
+
+def _stage1_submit_handler():
+    start = THINKING_JS.index("fetchAIStream('/thinking/api/stage1/submit'")
+    end = THINKING_JS.index("function showScoreResult", start)
+    return THINKING_JS[start:end]
+
+
+def test_stage1_pass_refreshes_lifecycle_without_page_reload():
+    handler = _stage1_submit_handler()
+    pass_block = handler[handler.index("if (data.passed)"):]
+
+    # The pass branch must pull the server-side stage-2 lifecycle so the
+    # elapsed time and next action update at the transition.
+    assert "refreshSessionLifecycle" in pass_block
+    # The signal arrives in place: no reload, no navigation away from inputs.
+    assert "location.reload" not in pass_block
+    assert "window.location" not in pass_block
+
+
+def test_stage1_lifecycle_refresh_uses_existing_status_endpoint():
+    # The refreshed signal is read from the existing read-only status route;
+    # the stage-1 submit response contract stays unchanged.
+    start = THINKING_JS.index("function refreshSessionLifecycle")
+    end = THINKING_JS.index("function init()", start)
+    sync_block = THINKING_JS[start:end]
+    assert "/thinking/api/session/${state.sessionId}/status" in sync_block