Replace moment.js with native Date/Intl APIs

[lkostrowski]

Scope of the change

Replace moment.js with native JavaScript Date and Intl APIs in 4 trivially replaceable cases. This reduces dependency on a deprecated library while maintaining equivalent functionality.

Changes:

• TaxAppLabel: use Intl.DateTimeFormat with user locale for date display

• useNewUserCheck: use native Date for validation and comparison

• handlers (preorder): use native Date for past-date check

• GiftCard utils: use native Date for expiry comparison

• Add TaxAppLabel unit tests for date formatting

• I confirm I added ripples for changes (see src/ripples) or my feature doesn't contain any user-facing changes

• I used analytics "trackEvent" for important events

Note: Other moment.js usages in the codebase remain unchanged (12+ files still depend on moment).

[changeset-bot]

🦋 Changeset detected

Latest commit: d16a500

The changes in this PR will be included in the next version bump.

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Click here if you're a maintainer who wants to add another changeset to this PR

[Copilot]

Pull request overview

This PR removes a few moment.js usages and replaces them with native Date/Intl APIs to reduce reliance on a deprecated dependency, plus adds a unit test around TaxAppLabel date formatting.

Changes:

• Replace moment with native Date comparisons in useNewUserCheck, preorder handlers, and gift card expiry logic.
• Update TaxAppLabel to format dates via Intl.DateTimeFormat using the user locale.
• Add TaxAppLabel unit tests and a changeset entry.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/welcomePage/WelcomePageOnboarding/hooks/useNewUserCheck.ts	Swaps moment parsing/comparison for native Date parsing and > comparison.
src/taxes/components/TaxAppLabel.tsx	Replaces moment(created).format(...) with Intl.DateTimeFormat(locale).format(...).
src/taxes/components/TaxAppLabel.test.tsx	Adds unit coverage for localized date rendering and conditional sections.
src/products/utils/handlers.ts	Replaces moment-based preorder end-date validation with native Date comparison.
src/giftCards/GiftCardUpdate/providers/GiftCardDetailsProvider/utils.ts	Replaces moment-based expiry check with native Date comparison.
.changeset/plenty-peaches-agree.md	Adds a changeset entry for the moment removal.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 43.14%. Comparing base (e640f8c) to head (d16a500).

Files with missing lines	Patch %	Lines
src/taxes/components/TaxAppLabel.stories.tsx	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6404      +/-   ##
==========================================
+ Coverage   43.13%   43.14%   +0.01%     
==========================================
  Files        2524     2525       +1     
  Lines       44009    44021      +12     
  Branches    10011    10011              
==========================================
+ Hits        18983    18993      +10     
- Misses      24985    24987       +2     
  Partials       41       41              

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