PAB-54: improve palette feedback workflow

[pablopunk]

This PR improves the feedback workflow for command palette actions by replacing ad‑hoc error and status views with a consistent, accessible list‑based feedback pattern. The changes deliver clearer user messaging, better accessibility, and richer toast notifications while protecting users from internal error details.

What changed

• Standardized feedback views
  Errors, warnings, and success states in the palette now use a structured list view (feedbackView) instead of raw markdown previews. Each feedback view shows:

  • A clear title and message, color‑coded and icon‑annotated by tone (error, success, info).
  • Optional contextual detail items (e.g., which files failed to uninstall).
  • A default “Back” action or custom recovery actions, making it easy to navigate away or retry.

• Richer toast notifications
  Toast messages now support info and success tones in addition to default and error, allowing more precise feedback for completed tasks (e.g., “1 item moved to Trash” shown as a success toast). Error toasts use role="alert" for screen readers.

• Safer user‑facing error messages
  System‑returned errors (such as app uninstall failures) are now replaced with concise, user‑friendly messages that never expose internal paths or raw system output.

• Accessibility enhancements

  • The new disabled item property prevents non‑selectable items from receiving keyboard focus, keeping navigation streamlined.
  • Form fields now include aria-invalid and aria-describedby to associate error messages with their controls.
  • The loading indicator gains an accessible status role.

• Extension API updates
  Extensions can now set disabled: true on palette items and use info/success toast tones. The ui.error() helper returns a feedback view instead of a plain markdown preview, aligning with the new pattern.

These changes make the overall palette feedback more predictable, visually scannable, and accessible while reducing the risk of leaking sensitive information through error messages.

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Project	Deployment	Actions	Updated (UTC)
nvm	Ready	Preview, Comment	Jul 17, 2026 3:48pm

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