format issue

Start with remembrance/browser/main_window.py at get_repeat_label and trace the repeat_frequency value from reminder.py's set_repeat_label. Reproduce with the reminders.csv line shown and verify that launching the application no longer raises the TypeError and the reminder is displayed with its repeat label.

reminders.csv line:
VE97u5zI,important note,,1780704000,1780718820,False,False,2,3,0,0,-1,0,1779206915,1779206915,local

result:
flatpak run io.github.dgsasha.Remembrance
2026-05-23 21:11:53,841 - remembrance - INFO - application:connect_to_service - Connected to service
Traceback (most recent call last):
File "/app/lib/python3.12/site-packages/remembrance/browser/application.py", line 86, in do_command_line
self.do_activate()
File "/app/lib/python3.12/site-packages/remembrance/browser/application.py", line 144, in do_activate
self.win = MainWindow(self.page, self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/lib/python3.12/site-packages/remembrance/browser/main_window.py", line 147, in init
self.unpack_reminders(reminders)
File "/app/lib/python3.12/site-packages/remembrance/browser/main_window.py", line 601, in unpack_reminders
self.display_reminder(**reminder)
File "/app/lib/python3.12/site-packages/remembrance/browser/main_window.py", line 640, in display_reminder
reminder = Reminder(
^^^^^^^^^
File "/app/lib/python3.12/site-packages/remembrance/browser/reminder.py", line 76, in init
self.set_labels()
File "/app/lib/python3.12/site-packages/remembrance/browser/reminder.py", line 268, in set_labels
self.set_repeat_label()
File "/app/lib/python3.12/site-packages/remembrance/browser/reminder.py", line 254, in set_repeat_label
self.win.get_repeat_label(
File "/app/lib/python3.12/site-packages/remembrance/browser/main_window.py", line 277, in get_repeat_label
type_name = repeat_frequency + ' ' + _('hours')
~~~~~~~~~~~~~~~~~^~~~~
TypeError: unsupported operand type(s) for +: 'int' and 'str'