04/29 Updated Time attendance export by building time frame

routes/time_attendance_export.py

@@ -137,10 +137,15 @@ def _resolve_date_range(start_date_filter, end_date_filter, records, export_labe
         )
         end_date = capped_end_date
 
-    # Preserve one extra calendar day so early-morning check-out records
-    # stored on Day N+1 remain available for overnight pairing detection.
-    # Display range is still controlled by dates_with_records (capped to end_date).
-    filtered_records = [r for r in records if r.attendance_date <= end_date + timedelta(days=1)]
+    # Apply both bounds:
+    # - Lower bound: exclude records before start_date (prevents historical data leaking in).
+    # - Upper bound (+1 day buffer): early-morning check-out records stored on Day N+1
+    #   must remain available for overnight pairing detection; the display range is
+    #   still controlled by each export's sorted_dates (capped to end_date).
+    filtered_records = [
+        r for r in records
+        if start_date <= r.attendance_date <= end_date + timedelta(days=1)
+    ]
 
     return start_date, end_date, filtered_records