Structure the menu for a 7-day period (Monday to Sunday).

[kenako1]

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[kenako1]

🔹 Definition of Done:
✔️ Managers can manually enter start and end dates within the allowed scheduling range.
✔️ The system enforces a 7-day period rule (Monday to Sunday).
✔️ Manual date inputs trigger dynamic menu updates for the corresponding week.
✔️ Backend properly processes and stores the manually selected dates.
✔️ Form validation ensures only valid date ranges are accepted.
✔️ Error messages guide users when entering invalid dates.
✔️ Feature is tested against different date formats and time zones.
✔️ Feature demo successfully completed.