fix(calendar): Prevent date range header from flickering

[shubham-021]

What does this PR do?

The issue was caused by incorrect handling of columnViewExtraDays.current value in packages/features/bookings/Booker/Booker.tsx.

Problem:

• nonEmptyScheduleDays array changes frequently as schedule data updates
• addonDays oscillates based on the array length
• The calculation ran for all layouts, not just column view
• This caused columnViewExtraDays.current to jump between values 5 and 11

Solution:

• Wrapped the calculation in useMemo with stable dependencies to prevent unnecessary recalculations.
• With memo , it only recalculates when dependencies actually change
• dependency uses nonEmptyScheduleDays.length instead of the array itself

• Fixes Date range header blinks repeatedly when navigating calendar views #25350
• Fixes CAL-6804

Visual Demo (For contributors especially)

A visual demonstration is strongly recommended, for both the original and new change (video / image - any one).

Video Demo (if applicable):

Reproducing the issue:

problem.mov

After fixing the issue:

solved_2.mov

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. If N/A, write N/A here and check the checkbox.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

The existing Booker component tests cover the logic.This fix is just an optimization (when the calculation runs), not a logic change.

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[github-actions]

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[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (all 1 issues)

Understand the root cause of the following 1 issues and fix them.


<file name="packages/features/bookings/Booker/Booker.tsx">

<violation number="1" location="packages/features/bookings/Booker/Booker.tsx:164">
The memoized column-view extra day calculation only depends on `nonEmptyScheduleDays.length` even though it uses the array’s contents, so updates that change availability without changing the length leave `columnViewExtraDays.current` stale and the header can show wrong day offsets.</violation>
</file>

_{Reply to cubic to teach it or ask questions. Re-run a review with @cubic-dev-ai review this PR}

[Udit-takkar]

Unit tests are failing.

[Pallava-Joshi]

marking this draft until then

[shubham-021]

@Udit-takkar @Pallava-Joshi
My changes only affects:

• packages/features/bookings/Booker/Booker.tsx
• packages/features/bookings/Booker/__mocks__/config.ts
• packages/features/bookings/Booker/__tests__/Booker.test.tsx

All Booker-specific tests pass successfully

[cubic-dev-ai]

No issues found across 3 files