c85a9c9bc4
- IX-2: Add confirm() dialogs before all destructive actions (10 history clear buttons, scheduler reset, background decode reset) - IX-6: Add Select All / Deselect All buttons for background decode bookmark checklist - IX-1: Add dirty-state indicator (pulsing dot) on Save buttons when unsaved changes exist in scheduler and background decode panels - A-4: Add role="alert" and aria-live="polite" to toast notification elements for screen reader accessibility - A-3: Add Unicode symbol prefixes to background decode state labels (checkmark/triangle/cross) so state is distinguishable without color https://claude.ai/code/session_01ShfPMW9hPLD3czp9YovkbJ Signed-off-by: Claude <noreply@anthropic.com>