fix(ui5-breadcrumbs): acc findings fixed

[PetyaMarkovaBogdanova]

7) Breadcrumbs (10 failing)

• Landmark uniqueness failures (duplicate navigation labeling patterns).
• Interaction issues in overflow/popover flows in interactive tests.
• Includes failures in scenarios like selecting overflow item and focus/closure flow.

Breadcrumbs	Duplicate navigation landmark labels	landmark uniqueness failures	Multiple nav regions share same accessible name or unnamed duplicates	Likely real	High	Make each nav landmark uniquely named or reduce redundant landmark exposure	Multiple breadcrumb/nav instances are distinguishable by accessible name
Breadcrumbs	Overflow/popover interaction failures	focus and closure flow issues	Trigger-popover relationship, focus return, or menuitem semantics inconsistent	Mixed, flow-dependent	Medium	Tighten trigger controls linkage and deterministic focus return on close/select	Keyboard path open-select-close-return focus works in all overflow states

[ui5-webcomponents-bot]

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