fix(DateDetails): use resolved timezone after fallback

[fallintoplace]

Summary

• keep track of the timezone that DateDetails actually resolves
• use the New York fallback for both date and timezone formatting
• cover invalid system timezones with a regression test

Why

DateDetails catches an invalid systemTimeZone and creates a New York time, but then passes the original invalid timezone back into the render-time formatters. Opening the popover therefore still throws a RangeError instead of displaying the fallback.

Validation

• yarn vitest run src/components/DateDetails/DateDetails.test.tsx
• yarn typecheck
• focused ESLint check for the changed DateDetails files
• yarn format

[changeset-bot]

🦋 Changeset detected

Latest commit: 96e4d50

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

This PR includes changesets to release 1 package

Name	Type
@clickhouse/click-ui	Patch

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