feat(06-06): add whole-series edit confirmation prompt
- Create SeriesEditPrompt.tsx: bottom-sheet (phone) / dialog (desktop) matching
DeleteConfirmationDialog pattern; focus trap, Escape=cancel, role=dialog/aria-modal
- UI-SPEC Surface 6 copy: 'Edit recurring series' heading, 'This will update all
occurrences of this event.' body, 'Update series' accent-filled CTA, 'Cancel' ghost
- Import SeriesEditPrompt + add seriesEditPromptOpen state to EventForm
- handleSubmit gates on occurrence.hasRrule: opens prompt for recurring edits;
executeSubmit() fires the existing whole-series PATCH on confirmation
- Save CTA label becomes 'Update series' for recurring edits (UI-SPEC primary CTAs)
- Non-recurring and create-mode Save behavior unchanged (no prompt)
Lucas Berger
96ef0b45b9