fix(telegram): keep info callbacks nonfatal

apps/api/src/services/telegram_gateway.py

@@ -4017,17 +4017,17 @@ class TelegramGateway:
                 if action == "detail":
                     # ADR-050 P2: 取得事件詳情，傳送新訊息 (保留原始簽核卡片+按鈕)
                     # 2026-04-01 Claude Code (ADR-050 P2)
-                    await self._answer_callback(callback_query_id, action, text="📋 詳情傳送中...")
+                    await self._answer_callback_nonfatal(callback_query_id, action, text="📋 詳情傳送中...")
                     await self._send_incident_detail(incident_id)
                 elif action == "history":
                     # ADR-050 P2: 取得頻率統計
                     # 2026-04-01 Claude Code (ADR-050 P2)
-                    await self._answer_callback(callback_query_id, action, text="📊 歷史統計傳送中...")
+                    await self._answer_callback_nonfatal(callback_query_id, action, text="📊 歷史統計傳送中...")
                     await self._send_incident_history(incident_id)
                 elif action == "reanalyze":
                     # ADR-050 P2: 觸發重診
                     # 2026-04-01 Claude Code (ADR-050 P2): reanalyze button handler
-                    await self._answer_callback(callback_query_id, action, text="🔄 重診排程中...")
+                    await self._answer_callback_nonfatal(callback_query_id, action, text="🔄 重診排程中...")
                     await self._send_reanalyze_result(incident_id)
                 elif action == "drift_view_page":
                     # 2026-04-20 P0.1 ogt + Claude Opus 4.7: drift_view 分頁切頁
@@ -4037,7 +4037,7 @@ class TelegramGateway:
                         _page_num = int(_page_str)
                     except ValueError:
                         _rid, _page_num = incident_id, 0
-                    await self._answer_callback(
+                    await self._answer_callback_nonfatal(
                         callback_query_id, action, text=f"📄 切換至第 {_page_num + 1} 頁..."
                     )
                     await self._send_drift_diff_detail(_rid or incident_id, page=_page_num)
@@ -4408,7 +4408,7 @@ class TelegramGateway:
 
         except UserNotWhitelistedError as e:
             logger.warning("telegram_callback_denied", error=str(e), user_id=user_id)
-            await self._answer_callback(
+            await self._answer_callback_nonfatal(
                 callback_query_id,
                 "denied",
                 text="⛔ 您沒有簽核權限",
@@ -4417,7 +4417,7 @@ class TelegramGateway:
 
         except NonceReplayError as e:
             logger.warning("telegram_callback_replay", error=str(e))
-            await self._answer_callback(
+            await self._answer_callback_nonfatal(
                 callback_query_id,
                 "replay",
                 text="⚠️ 此操作已處理過",
@@ -4426,7 +4426,7 @@ class TelegramGateway:
 
         except Exception as e:
             logger.error("telegram_callback_error", error=str(e))
-            await self._answer_callback(
+            await self._answer_callback_nonfatal(
                 callback_query_id,
                 "error",
                 text="❌ 處理失敗",
@@ -5017,6 +5017,22 @@ class TelegramGateway:
             "show_alert": False,
         })
 
+    async def _answer_callback_nonfatal(
+        self,
+        callback_query_id: str,
+        action: str,
+        text: str | None = None,
+    ) -> None:
+        """Best-effort callback toast; never block the actual DB-backed reply."""
+        try:
+            await self._answer_callback(callback_query_id, action, text=text)
+        except Exception as exc:
+            logger.warning(
+                "telegram_answer_callback_nonfatal_failed",
+                action=action,
+                error=str(exc),
+            )
+
     async def _update_message_after_action(
         self,
         message_id: int,

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"""