The presenter view now doubles as a rehearsal clock that measures without
coaching: a countdown against a target time, the time spent on the current
slide, and an end-of-run summary (total vs. target and per-slide times, with
copy-to-clipboard). Timing lives in a plain, unit-tested RehearsalController fed
via an idempotent observe() on every build, so it captures every navigation
path. The default target is stored in AppSettings; live adjustment is the K key
(typed as MMSS). All rehearsal state is session-only -- nothing is written to
disk or into the .md file.
- New: models/rehearsal.dart, services/rehearsal_controller.dart,
widgets/presentation/rehearsal_summary.dart, plus a controller unit test.
- Presenter: countdown + per-slide timer in the clock bar, K to set the target,
R resets the run, end-of-run summary dialog, and help/cheatsheet entries.
- Settings: presentationTargetSeconds (default target) with a dropdown in the
General tab, threaded into FullscreenPresenter.present().
- l10n: new Dutch source strings translated in all seven languages.
- Docs: README, CHANGELOG, USER_GUIDE, SHORTCUTS, ARCHITECTURE.
Also bundles a pre-existing in-progress change already in the working tree: wire
the existing ThemeProfile.tableHeaderBackgroundColor into table rendering
(preview, HTML export, file_service) and the settings dialog, plus its
translations.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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