fix(telegram): keep info callbacks nonfatal

apps/api/tests/test_telegram_message_templates.py

@@ -195,6 +195,35 @@ async def test_send_html_line_message_attaches_awooop_markup_to_first_chunk(monk
     assert all("reply_markup" not in payload for _, payload in sent_requests[1:])
 
 
+@pytest.mark.asyncio
+async def test_info_callback_sends_history_when_answer_callback_is_stale(monkeypatch):
+    """Telegram answerCallbackQuery 400 不得阻斷詳情/歷史 DB truth-chain reply。"""
+    gateway = TelegramGateway()
+    sent_history = []
+
+    monkeypatch.setattr(gateway._security, "is_whitelisted", lambda _user_id: True)
+
+    async def stale_answer(*_args, **_kwargs):
+        raise telegram_gateway_module.TelegramGatewayError("HTTP error: 400")
+
+    async def fake_history(incident_id: str):
+        sent_history.append(incident_id)
+
+    monkeypatch.setattr(gateway, "_answer_callback", stale_answer)
+    monkeypatch.setattr(gateway, "_send_incident_history", fake_history)
+
+    result = await gateway.handle_callback(
+        callback_query_id="stale-callback",
+        callback_data="history:INC-20260513-79ED5E",
+        user_id=123456,
+        message_id=789,
+    )
+
+    assert result["success"] is True
+    assert result["info_action"] is True
+    assert sent_history == ["INC-20260513-79ED5E"]
+
+
 class TestTelegramMessageFormat:
     """測試現有 TelegramMessage 格式化"""