Update cwa_service.py

cwa_service.py

@@ -82,8 +82,10 @@ def _parse_significant_earthquakes(obj: dict) -> pd.DataFrame:
             "URL": q.get("Web"),
         })
     df = pd.DataFrame(rows)
-    if not df.empty:
-        df["Time"] = pd.to_datetime(df["Time"], errors="coerce").dt.tz_convert(TAIPEI_TZ)
+    if not df.empty and "Time" in df.columns:
+        time_series = pd.to_datetime(df["Time"], errors="coerce")
+        # [修正] 先用 tz_localize('UTC') 賦予 UTC 時區，再用 tz_convert 轉換為台北時區
+        df["Time"] = time_series.dt.tz_localize("UTC").dt.tz_convert(TAIPEI_TZ)
     return df
 
 def fetch_significant_earthquakes(days: int = 7, limit: int = 5) -> str:
@@ -122,3 +124,4 @@ def fetch_significant_earthquakes(days: int = 7, limit: int = 5) -> str:
         
     except Exception as e:
         return f"❌ 顯著地震查詢失敗：{e}"
+