diff --git a/backend/src/timeflow/business/calendar/service.py b/backend/src/timeflow/business/calendar/service.py
index 60d94e14..c38dea3d 100644
--- a/backend/src/timeflow/business/calendar/service.py
+++ b/backend/src/timeflow/business/calendar/service.py
@@ -203,8 +203,10 @@ def create_schedule(
                 )
             except Exception as exc:
                 logger.warning(
-                    "schedule category task could not be submitted; leaving category null",
-                    extra={"error_type": type(exc).__name__},
+                    "schedule category task could not be submitted (error_type=%s): %s; "
+                    "leaving category null",
+                    type(exc).__name__,
+                    exc,
                 )
         return ScheduleMutationResult(schedules=(persisted,))
 
@@ -233,13 +235,17 @@ def _classify_and_persist_category(
                             self._category_event_publisher(account_id, schedule_id, category)
                         except Exception as exc:
                             logger.warning(
-                                "schedule category event could not be published",
-                                extra={"error_type": type(exc).__name__},
+                                "schedule category event could not be published "
+                                "(error_type=%s): %s",
+                                type(exc).__name__,
+                                exc,
                             )
         except Exception as exc:
             logger.warning(
-                "schedule category result could not be persisted; leaving category null",
-                extra={"error_type": type(exc).__name__},
+                "schedule category result could not be persisted (error_type=%s): %s; "
+                "leaving category null",
+                type(exc).__name__,
+                exc,
             )
 
     def _classify_category(self, command: CreateScheduleCommand) -> ScheduleCategory | None:
@@ -249,8 +255,10 @@ def _classify_category(self, command: CreateScheduleCommand) -> ScheduleCategory
             category = self._category_classifier.classify(command)
         except Exception as exc:
             logger.warning(
-                "schedule category classifier raised unexpectedly; leaving category null",
-                extra={"error_type": type(exc).__name__},
+                "schedule category classifier raised unexpectedly (error_type=%s): %s; "
+                "leaving category null",
+                type(exc).__name__,
+                exc,
             )
             return None
         if category is None:
diff --git a/backend/src/timeflow/infrastructure/settings.py b/backend/src/timeflow/infrastructure/settings.py
index be555524..f034b0e5 100644
--- a/backend/src/timeflow/infrastructure/settings.py
+++ b/backend/src/timeflow/infrastructure/settings.py
@@ -47,7 +47,7 @@ class Settings:
     openai_api_key: str = ""
     openai_model: str = "qwen-flash"
     openai_timeout_seconds: float = 30.0
-    schedule_category_timeout_seconds: float = 5.0
+    schedule_category_timeout_seconds: float = 10.0
     agent_max_tool_rounds: int = 4
     aliyun_tts_ws_url: str = ""
     aliyun_tts_api_key: str = ""
@@ -96,7 +96,7 @@ def from_environment(cls, env_file: Path | str = ".env") -> "Settings":
 
         openai_timeout_seconds = float(environ.get("TIMEFLOW_OPENAI_TIMEOUT_SECONDS", "30.0"))
         schedule_category_timeout_seconds = float(
-            environ.get("TIMEFLOW_SCHEDULE_CATEGORY_TIMEOUT_SECONDS", "5.0")
+            environ.get("TIMEFLOW_SCHEDULE_CATEGORY_TIMEOUT_SECONDS", "10.0")
         )
         agent_max_tool_rounds = int(environ.get("TIMEFLOW_AGENT_MAX_TOOL_ROUNDS", "4"))
         tencent_map_timeout_seconds = float(
diff --git a/backend/src/timeflow/intelligence/schedule_category.py b/backend/src/timeflow/intelligence/schedule_category.py
index d460e8ff..ac5d86db 100644
--- a/backend/src/timeflow/intelligence/schedule_category.py
+++ b/backend/src/timeflow/intelligence/schedule_category.py
@@ -44,8 +44,10 @@ def classify(self, command: CreateScheduleCommand) -> ScheduleCategory | None:
             return ScheduleCategory(category)
         except Exception as exc:
             logger.warning(
-                "schedule category classification failed; leaving category null",
-                extra={"error_type": type(exc).__name__},
+                "schedule category classification failed (error_type=%s): %s; "
+                "leaving category null",
+                type(exc).__name__,
+                exc,
             )
             return None
 
diff --git a/backend/tests/test_settings.py b/backend/tests/test_settings.py
index ea356d01..ee3b4c8d 100644
--- a/backend/tests/test_settings.py
+++ b/backend/tests/test_settings.py
@@ -173,7 +173,7 @@ def test_settings_use_qwen_llm_defaults(
     assert settings.openai_api_key == ""
     assert settings.openai_model == "qwen-flash"
     assert settings.openai_timeout_seconds == 30.0
-    assert settings.schedule_category_timeout_seconds == 5.0
+    assert settings.schedule_category_timeout_seconds == 10.0
     assert settings.openai_is_configured() is False
     assert settings.agent_max_tool_rounds == 4
     assert settings.voice_agent_mode == "1"