This PR ensures time fields are required when dates are set, using Oqtane validation and dynamically toggles the required attribute on time inputs when their corresponding date fields have values. Benefits:
- Uses Oqtane's validation for a polished UX.
- Reduces custom validation code.
- Aligns with our internal form logic.
- Tested across all date/time scenarios—works flawlessly!
**Testing Confirmed:**
- Date + Time Provided → Saves successfully.
- No Date + No Time → Optional (no validation).
- Date + No Time → Browser blocks submission with icon error.
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