fix(breadcrumbs): close result dropdown when no hidden items (#DS-4578)

[NikGurev]

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[Copilot]

Pull request overview

This PR updates the KbqBreadcrumbs overflow behavior so that when all breadcrumb items become visible again (e.g., after a resize), the overflow “result” dropdown panel is closed instead of staying open.

Changes:

• Close the breadcrumbs overflow dropdown trigger when there are no hidden items.
• Extend breadcrumbs E2E fixture to include a [max]="null" container for width-overflow scenarios.
• Add a Playwright test that resizes the host and asserts the dropdown panel disappears.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/components/breadcrumbs/breadcrumbs.ts	Programmatically closes the overflow dropdown when all items are visible.
packages/components/breadcrumbs/e2e.ts	Adds an additional breadcrumbs container for width overflow testing.
packages/components/breadcrumbs/e2e.playwright-spec.ts	Adds a regression test covering dropdown auto-close when items fit.

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