🎨 Palette: Improve drilldown navigation accessibility and keyboard focus

[aarjava]

💡 What: Converted the generic breadcrumb div to a semantic <nav aria-label="Breadcrumb">, marked active steps with aria-current="step", added dynamic progression announcements via aria-live="polite", added high-contrast keyboard focus outlines to interactive elements, and hid decorative chevron icons from screen readers.

🎯 Why: The drilldown navigation previously lacked sufficient semantic context for screen readers to understand the relationship between steps. Deeply embedded navigational components also lacked standard visual focus indicators during keyboard traversal, and dynamic progress text wasn't being announced.

📸 Before/After: Visual focus rings now visible during Tab navigation, and screen reader testing simulated.

♿ Accessibility:

• Changed breadcrumb container to <nav aria-label="Breadcrumb">
• Added aria-current="step" to the active level button
• Added focus-visible:ring-2 focus-visible:ring-neutral-400 to breadcrumb and control buttons
• Added aria-live="polite" to the dynamic Level counter ("Level X of Y")
• Added aria-hidden="true" to purely decorative ChevronLeft and ChevronRight icons
• Documented learnings in .Jules/palette.md

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PR created automatically by Jules for task 7703703286919734016 started by @aarjava

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Project	Deployment	Actions	Updated (UTC)
fluxlens-ai	Ready	Preview, Comment	Jul 7, 2026 10:36pm

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