Calendar event custom frequency prefill

[rh12]

refs: MBL-17971
affects: Student, Teacher
release note: Custom calendar frequency screen now reuses the currently selected frequency.

What's changed

CustomFrequency screen is now prefilled with values from the current selection in the previous screen.

Tapping "Custom" when current selection is:

• "Does not repeat", it still shows the default state, where nothing is prefilled
• a predefined option (daily/weekly/monthly/annually/weekdays), it prefills values accordingly
• custom frequencies, it prefills values accordingly, both when:
  • coming from backend (and has it's own backend provided title)
  • set by the user but not Saved to backend yet ("Custom" option)

Chores

• Improved Back button animation
• Renamed EditEventFrequencyScreen to SelectEventFrequencyScreen
• Renamed FrequencyChoice to FrequencyPresetViewModel
• Rearranged helpers, methods (like moving general Date extensions to its dedicated file, etc.)
• Removed some unused code
• Cleaned up DateExtensions.swift
• Added various comments & documentation
• Silenced coverage warnings

Test plan

• Verify prefill works as described above
• Verify selecting, saving, updating frequencies work as before

Checklist

• Follow-up e2e test ticket created
• Tested on phone
• Tested on tablet

[inst-danger]

Release Note:

Custom calendar frequency screen now reuses the currently selected frequency.

Affected Apps: Student, Teacher

MBL-17971

Coverage	New %	Master %	Delta
Canvas iOS	91.7%	91.07%	0.64%

Generated by 🚫 dangerJS against 6dae0ab

[suhaibabsi-inst]

QA + 1

[inst-danger]

Teacher Build QR Code:

[inst-danger]

Student Build QR Code:

[vargaat]

QA+1

[suhaibabsi-inst]

Thanks