feat(cli): improve member design and usability

backend/repositories/schedule.py

@@ -257,8 +257,14 @@ class ScheduleRepository(BaseRepository[ScheduleModel]):
         """
         rows = self.db.fetchall(sql, (service_id, ScheduleStatus.PENDING.value))
         return [ScheduleModel.from_row(r) for r in rows]
-
-    def delete(self, schedule_id: int) -> None:
-        """Hard‑delete a schedule row (use with caution)."""
+    
+    def delete_schedule(self, schedule_id: int) -> bool:
+        """
+        Delete a schedule by ID.
+        
+        Returns:
+            bool: True if a schedule was deleted, False if not found
+        """
         sql = f"DELETE FROM {self._TABLE} WHERE {self._PK} = ?"
-        self.db.execute(sql, (schedule_id,))
+        cursor = self.db.execute(sql, (schedule_id,))
+        return cursor.rowcount > 0