Feat: improve exception handling

src/aura_engine/scheduling/timetable.py

@@ -125,12 +125,25 @@ class TimetableService:
         """
         Stores the current timetable to the local JSON file used for caching.
         """
+        if self.timetable_file is None:
+            self.logger.error(SU.red("No timetable file specified."))
+            return
+
+        # Ensure the directory exists
+        os.makedirs(os.path.dirname(self.timetable_file), exist_ok=True)
+
         try:
             with open(self.timetable_file, "w") as file:
                 file.write(jsonpickle.encode(self.timetable, unpicklable=self.restorable))
                 self.logger.info(SU.green("timetable.json stored"))
+        except FileNotFoundError as fnf_error:
+            self.logger.error(SU.red(f"File not found: {self.timetable_file}. {fnf_error}"))
+        except PermissionError as perm_error:
+            self.logger.error(
+                SU.red(f"Permission denied for file: {self.timetable_file}. {perm_error}")
+            )
         except Exception as e:
-            self.logger.error(SU.red(f"Error while storing {self.timetable_file}"), e)
+            self.logger.error(SU.red(f"Unexpected error while storing {self.timetable_file}: {e}"))
 
     def get_current_item(self) -> PlaylistItem | None:
         """