Add presentation timer / rehearsal mode to the presenter

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>

CHANGELOG.md

@@ -8,6 +8,15 @@ and the project aims to follow [Semantic Versioning](https://semver.org/).
 ## [Unreleased]
 
 ### Added
+- **Presentation timer / rehearsal mode** — the presenter view now doubles as a
+  rehearsal clock that measures without coaching. A **countdown** runs against a
+  target time (default under *Settings → General → Presentation*, or set live with
+  `K` as `MMSS`; `0` turns it off) and turns red when you go over. The clock bar
+  also shows the time spent on the **current slide**, accumulated per slide across
+  the run. `R` resets the run (elapsed and per-slide timings, keeping the target).
+  Leaving the presenter after a run shows a **summary** (total vs. target, time per
+  slide) with copy-to-clipboard. Session-only: nothing is persisted to disk or the
+  `.md` file.
 - **Duplicate clean-up in the image library** — a footer button finds
   byte-identical images by md5 checksum, keeps one file per group (preferring
   the one used in slides, then the oldest), merges the tags/descriptions and

README.md

@@ -14,6 +14,7 @@ Built with Flutter for macOS, Windows, and Linux.
 - **Live preview** — see each slide rendered as you edit, with inline Markdown, footers, and TLP (Traffic Light Protocol) marking. Free-Markdown slides render fenced code with syntax highlighting and `$…$` / `$$…$$` LaTeX math.
 - **Traffic Light Protocol** — a deck-wide classification plus an optional **per-slide TLP level**; slides classified stricter than the level the deck is shown at are automatically withheld, both when presenting and exporting. An optional **export release ceiling** can block exporting any deck classified above a chosen level — enforced for every format, off by default.
 - **Fullscreen presenter** — keyboard-driven navigation, presenter view, blank screen, auto-advance, and a slide-grid overview.
+- **Presentation timer / rehearsal mode** — the presenter view doubles as a rehearsal clock: a countdown against a target time (set in Settings or live with `K`), the time spent on the current slide, and an end-of-run summary (total vs. target and per-slide times, copyable). It measures only — no pacing coaching — and is session-only, never written to disk.
 - **Dual-screen presenter** — when a second display is connected, the beamer shows the slide while the laptop shows the presenter view (current/next slide, notes, timer), kept in sync.
 - **Annotation layer** — draw on slides while presenting (pen, highlighter, eraser, laser pointer). Kept as a separate layer that never touches the Marp Markdown, mirrored live to the beamer, and saved in a `.ink.json` sidecar.
 - **Media handling** — drag-and-drop images, an image carousel picker, captions, and descriptions stored as sidecar metadata. The library can filter images without tags and clean up md5-identical duplicates (merging their tags/captions and repointing every deck — open or on disk — to the kept file).

docs/ARCHITECTURE.md

@@ -18,7 +18,7 @@ lib/
   services/   # markdown, file, export, classification_policy, image, caption,
               # description, image_dedup (md5 duplicates),
               # image_reference (.md rewrites), recovery, rasterizer,
-              # marp_html, annotation_codec
+              # marp_html, annotation_codec, rehearsal_controller
   state/      # Riverpod providers: deck, editor, settings, tabs, clipboard
   widgets/    # app shell, panels, dialogs, per-type editors, slides, presenter
   l10n/       # AppLocalizations (8 languages)
@@ -84,6 +84,13 @@ before any work starts.
   and the **annotation tools** (pen/highlighter/eraser/laser).
 - Neighbour slide images are **precached** and `gaplessPlayback` is on, so slide
   changes never flash black (important for screen recording).
+- **Rehearsal timing** lives in `services/rehearsal_controller.dart` — a plain,
+  unit-testable controller (injectable clock) that the presenter feeds via a
+  cheap, idempotent `observe(id, index)` on every build, so it captures every
+  navigation path. It measures only: elapsed, remaining against a target, and
+  per-slide time — no pacing logic. State is **session-only** (no prefs, no `.md`);
+  `_exit` shows a summary (`rehearsal_summary.dart`) and discards it. The default
+  target lives in `AppSettings.presentationTargetSeconds`.
 
 ### Dual-screen mode
 

docs/SHORTCUTS.md

@@ -35,10 +35,11 @@ View & timing:
 
 | Shortcut | Action |
 | --- | --- |
-| `P` | Toggle presenter view (notes, clock, next slide) |
+| `P` | Toggle presenter view (notes, clock, countdown, per-slide timer, next slide) |
 | `S` | Move the presentation to another screen |
 | `B` · `W` | Black · white screen |
-| `R` | Reset the elapsed-time counter |
+| `K` | Set the target time / countdown (type `MMSS`, `Enter` to confirm, `0` = off) |
+| `R` | Reset the time & rehearsal run (elapsed and per-slide timings; the target stays) |
 | `A` | Auto-advance on/off |
 | `L` | Loop (restart after the last slide) on/off |
 | `M` | Advance automatically after a slide's audio finishes |

docs/USER_GUIDE.md

@@ -122,8 +122,30 @@ set a **release ceiling** — a maximum level that may leave the machine; see
 
 Start the fullscreen presenter from the toolbar. See
 [`SHORTCUTS.md`](SHORTCUTS.md) for the full key list; highlights: arrows to move,
-`G` for the grid overview, `B`/`W` to blank, `P` for presenter view, `H` for the
+`G` for the grid overview, `B`/`W` to blank, `P` for presenter view, `K` for the
-in-app cheatsheet.
+countdown, `R` to reset the timing, `H` for the in-app cheatsheet.
+
+### Rehearsing and timing
+
+The presenter view (`P`) is also a rehearsal clock — it measures, it does not
+nag. The clock bar shows four things:
+
+- **Elapsed** — time since the run started (or since the last `R`).
+- **Remaining** — a countdown against a **target time**. It turns red and shows a
+  minus sign once you go over; there is no "speed up" coaching, just the number.
+- **This slide** — how long you have spent on the current slide. Time accumulates
+  per slide across the whole run, even if you jump back and forth.
+- **Clock** — the wall-clock time.
+
+Set the target time up front under *Settings → General → Presentation*, or change
+it live while presenting with **`K`** (type the minutes and seconds as `MMSS`,
+`Enter` to confirm, `0` to switch the countdown off). **`R`** resets the run —
+elapsed time and per-slide timings — while keeping the target.
+
+When you leave the presenter after a run of at least ten seconds, a **summary**
+shows the total time against the target and the time spent per slide, with a
+button to copy the times to the clipboard. This is **session-only**: nothing is
+written to disk or into the `.md` file.
 
 ### Two screens (beamer + laptop)
 

lib/l10n/app_localizations.dart

@@ -2429,6 +2429,28 @@ const _dutchSourceStrings = {
 const _dutchSourceStringAdditions = {
   'en': {
     'Toegankelijkheid': 'Accessibility',
+    'Presentatie': 'Presentation',
+    'Tabel kopachtergrond': 'Table header background',
+    'Doeltijd': 'Target time',
+    'Doeltijd (aftellen)': 'Target time (countdown)',
+    'Geen aftelling': 'No countdown',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Default target time for the presenter countdown. Fine-tune it while presenting with the K key.',
+    'uit': 'off',
+    'Doeltijd / aftellen (K)': 'Target / countdown (K)',
+    'Doeltijd / aftellen instellen (MMSS)': 'Set target / countdown (MMSS)',
+    'Tijd & oefenrun resetten': 'Reset time & rehearsal',
+    'Resterend': 'Remaining',
+    'Over de tijd': 'Over time',
+    'Binnen de tijd': 'Within time',
+    'Deze slide': 'This slide',
+    'Oefenrun': 'Rehearsal',
+    'Totaal': 'Total',
+    'Totale tijd': 'Total time',
+    'Geen slides gemeten.': 'No slides measured.',
+    'Tijden gekopieerd naar klembord.': 'Times copied to clipboard.',
+    'Kopieer': 'Copy',
+    'Sluiten': 'Close',
     'Tekstgrootte van de interface': 'Interface text size',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Enlarges all editor text up to 200%. The slides themselves are not affected.',
@@ -2586,6 +2608,29 @@ const _dutchSourceStringAdditions = {
   },
   'it': {
     'Toegankelijkheid': 'Accessibilità',
+    'Presentatie': 'Presentazione',
+    'Tabel kopachtergrond': 'Sfondo intestazione tabella',
+    'Doeltijd': 'Tempo obiettivo',
+    'Doeltijd (aftellen)': 'Tempo obiettivo (conto alla rovescia)',
+    'Geen aftelling': 'Nessun conto alla rovescia',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Tempo obiettivo predefinito per il conto alla rovescia del presentatore. Regolalo durante la presentazione con il tasto K.',
+    'uit': 'off',
+    'Doeltijd / aftellen (K)': 'Obiettivo / conto alla rovescia (K)',
+    'Doeltijd / aftellen instellen (MMSS)':
+        'Imposta obiettivo / conto alla rovescia (MMSS)',
+    'Tijd & oefenrun resetten': 'Azzera tempo e prova',
+    'Resterend': 'Rimanente',
+    'Over de tijd': 'Tempo superato',
+    'Binnen de tijd': 'Entro il tempo',
+    'Deze slide': 'Questa slide',
+    'Oefenrun': 'Prova',
+    'Totaal': 'Totale',
+    'Totale tijd': 'Tempo totale',
+    'Geen slides gemeten.': 'Nessuna slide misurata.',
+    'Tijden gekopieerd naar klembord.': 'Tempi copiati negli appunti.',
+    'Kopieer': 'Copia',
+    'Sluiten': 'Chiudi',
     'Tekstgrootte van de interface': 'Dimensione del testo dell\'interfaccia',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Ingrandisce tutto il testo dell\'editor fino al 200%. Le slide non cambiano.',
@@ -2890,6 +2935,30 @@ const _dutchSourceStringAdditions = {
   },
   'de': {
     'Toegankelijkheid': 'Barrierefreiheit',
+    'Presentatie': 'Präsentation',
+    'Tabel kopachtergrond': 'Tabellenkopf-Hintergrund',
+    'Doeltijd': 'Zielzeit',
+    'Doeltijd (aftellen)': 'Zielzeit (Countdown)',
+    'Geen aftelling': 'Kein Countdown',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Standard-Zielzeit für den Countdown im Präsentationsmodus. Während der Präsentation mit der Taste K feinjustierbar.',
+    'uit': 'aus',
+    'Doeltijd / aftellen (K)': 'Zielzeit / Countdown (K)',
+    'Doeltijd / aftellen instellen (MMSS)':
+        'Zielzeit / Countdown einstellen (MMSS)',
+    'Tijd & oefenrun resetten': 'Zeit & Probelauf zurücksetzen',
+    'Resterend': 'Verbleibend',
+    'Over de tijd': 'Zeit überschritten',
+    'Binnen de tijd': 'Innerhalb der Zeit',
+    'Deze slide': 'Diese Folie',
+    'Oefenrun': 'Probelauf',
+    'Totaal': 'Gesamt',
+    'Totale tijd': 'Gesamtzeit',
+    'Geen slides gemeten.': 'Keine Folien gemessen.',
+    'Tijden gekopieerd naar klembord.':
+        'Zeiten in die Zwischenablage kopiert.',
+    'Kopieer': 'Kopieren',
+    'Sluiten': 'Schließen',
     'Tekstgrootte van de interface': 'Textgröße der Oberfläche',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Vergrößert sämtlichen Text der Bearbeitungsumgebung auf bis zu 200 %. Die Folien selbst ändern sich nicht.',
@@ -3193,6 +3262,30 @@ const _dutchSourceStringAdditions = {
   },
   'fr': {
     'Toegankelijkheid': 'Accessibilité',
+    'Presentatie': 'Présentation',
+    'Tabel kopachtergrond': 'Fond d\'en-tête de tableau',
+    'Doeltijd': 'Temps cible',
+    'Doeltijd (aftellen)': 'Temps cible (compte à rebours)',
+    'Geen aftelling': 'Pas de compte à rebours',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Temps cible par défaut pour le compte à rebours du présentateur. Ajustez-le pendant la présentation avec la touche K.',
+    'uit': 'off',
+    'Doeltijd / aftellen (K)': 'Cible / compte à rebours (K)',
+    'Doeltijd / aftellen instellen (MMSS)':
+        'Définir cible / compte à rebours (MMSS)',
+    'Tijd & oefenrun resetten': 'Réinitialiser temps et répétition',
+    'Resterend': 'Restant',
+    'Over de tijd': 'Temps dépassé',
+    'Binnen de tijd': 'Dans les temps',
+    'Deze slide': 'Cette diapo',
+    'Oefenrun': 'Répétition',
+    'Totaal': 'Total',
+    'Totale tijd': 'Temps total',
+    'Geen slides gemeten.': 'Aucune diapo mesurée.',
+    'Tijden gekopieerd naar klembord.':
+        'Temps copiés dans le presse-papiers.',
+    'Kopieer': 'Copier',
+    'Sluiten': 'Fermer',
     'Tekstgrootte van de interface': 'Taille du texte de l\'interface',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Agrandit tout le texte de l\'éditeur jusqu\'à 200 %. Les diapositives ne changent pas.',
@@ -3500,6 +3593,29 @@ const _dutchSourceStringAdditions = {
   },
   'es': {
     'Toegankelijkheid': 'Accesibilidad',
+    'Presentatie': 'Presentación',
+    'Tabel kopachtergrond': 'Fondo de encabezado de tabla',
+    'Doeltijd': 'Tiempo objetivo',
+    'Doeltijd (aftellen)': 'Tiempo objetivo (cuenta atrás)',
+    'Geen aftelling': 'Sin cuenta atrás',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Tiempo objetivo predeterminado para la cuenta atrás del presentador. Ajústalo durante la presentación con la tecla K.',
+    'uit': 'off',
+    'Doeltijd / aftellen (K)': 'Objetivo / cuenta atrás (K)',
+    'Doeltijd / aftellen instellen (MMSS)':
+        'Definir objetivo / cuenta atrás (MMSS)',
+    'Tijd & oefenrun resetten': 'Restablecer tiempo y ensayo',
+    'Resterend': 'Restante',
+    'Over de tijd': 'Tiempo excedido',
+    'Binnen de tijd': 'Dentro del tiempo',
+    'Deze slide': 'Esta diapositiva',
+    'Oefenrun': 'Ensayo',
+    'Totaal': 'Total',
+    'Totale tijd': 'Tiempo total',
+    'Geen slides gemeten.': 'No se midieron diapositivas.',
+    'Tijden gekopieerd naar klembord.': 'Tiempos copiados al portapapeles.',
+    'Kopieer': 'Copiar',
+    'Sluiten': 'Cerrar',
     'Tekstgrootte van de interface': 'Tamaño del texto de la interfaz',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Amplía todo el texto del editor hasta un 200 %. Las diapositivas no cambian.',
@@ -3804,6 +3920,29 @@ const _dutchSourceStringAdditions = {
   },
   'fy': {
     'Toegankelijkheid': 'Tagonklikens',
+    'Presentatie': 'Presintaasje',
+    'Tabel kopachtergrond': 'Tabelkop-eftergrûn',
+    'Doeltijd': 'Doeltiid',
+    'Doeltijd (aftellen)': 'Doeltiid (ôftelle)',
+    'Geen aftelling': 'Gjin ôftelling',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Standert doeltiid foar it ôftellen yn de presinter. Under it presintearjen fyn ôf te stellen mei de toets K.',
+    'uit': 'út',
+    'Doeltijd / aftellen (K)': 'Doeltiid / ôftelle (K)',
+    'Doeltijd / aftellen instellen (MMSS)':
+        'Doeltiid / ôftelle ynstelle (MMSS)',
+    'Tijd & oefenrun resetten': 'Tiid & oefenrin weromsette',
+    'Resterend': 'Oerbleaun',
+    'Over de tijd': 'Oer de tiid',
+    'Binnen de tijd': 'Binnen de tiid',
+    'Deze slide': 'Dizze slide',
+    'Oefenrun': 'Oefenrin',
+    'Totaal': 'Totaal',
+    'Totale tijd': 'Totale tiid',
+    'Geen slides gemeten.': 'Gjin slides metten.',
+    'Tijden gekopieerd naar klembord.': 'Tiden nei it klamboerd kopiearre.',
+    'Kopieer': 'Kopiearje',
+    'Sluiten': 'Slute',
     'Tekstgrootte van de interface': 'Tekstgrutte fan de ynterface',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Fergruttet alle tekst fan de bewurkomjouwing oant maksimaal 200%. De slides sels feroarje net.',
@@ -4101,6 +4240,29 @@ const _dutchSourceStringAdditions = {
   },
   'pap': {
     'Toegankelijkheid': 'Aksesibilidat',
+    'Presentatie': 'Presentashon',
+    'Tabel kopachtergrond': 'Fondo di kabes di tabel',
+    'Doeltijd': 'Tempo meta',
+    'Doeltijd (aftellen)': 'Tempo meta (kuenta atras)',
+    'Geen aftelling': 'Sin kuenta atras',
+    'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.':
+        'Tempo meta default pa e kuenta atras di e presentadó. Ahustá durante presentashon ku e tekla K.',
+    'uit': 'pagá',
+    'Doeltijd / aftellen (K)': 'Meta / kuenta atras (K)',
+    'Doeltijd / aftellen instellen (MMSS)':
+        'Konfigurá meta / kuenta atras (MMSS)',
+    'Tijd & oefenrun resetten': 'Reset tempo i ensayo',
+    'Resterend': 'Restante',
+    'Over de tijd': 'Pasá di tempo',
+    'Binnen de tijd': 'Den tempo',
+    'Deze slide': 'E slide aki',
+    'Oefenrun': 'Ensayo',
+    'Totaal': 'Total',
+    'Totale tijd': 'Tempo total',
+    'Geen slides gemeten.': 'No a midi slide.',
+    'Tijden gekopieerd naar klembord.': 'Tempo kopiá na klipbord.',
+    'Kopieer': 'Kopia',
+    'Sluiten': 'Sera',
     'Tekstgrootte van de interface': 'Tamaño di teksto di e interfaz',
     'Vergroot alle tekst van de bewerkomgeving tot maximaal 200%. De slides zelf veranderen niet mee.':
         'Ta hasi tur teksto di e editor mas grandi te 200%. E slidenan mes no ta kambia.',

lib/models/rehearsal.dart

@@ -0,0 +1,46 @@
+import 'package:flutter/foundation.dart';
+
+/// Tijd die tijdens een oefenrun aan één slide is besteed.
+///
+/// Sessie-only: niets hiervan wordt op schijf bewaard (geen prefs, geen `.md`).
+/// Het bestand blijft inhoud; oefentijden leven alleen in het draaiende
+/// presenter-venster.
+@immutable
+class SlideTiming {
+  /// Stabiele slide-id binnen de sessie ([Slide.id]).
+  final String slideId;
+
+  /// 0-gebaseerde positie waarop de slide voor het eerst werd getoond. Dient
+  /// alleen voor een stabiele weergavevolgorde in de samenvatting.
+  final int index;
+
+  /// Opgetelde wandkloktijd op deze slide over de hele run (een slide kan
+  /// meerdere keren bezocht zijn).
+  final Duration spent;
+
+  const SlideTiming({
+    required this.slideId,
+    required this.index,
+    required this.spent,
+  });
+}
+
+/// Samenvatting van één oefenrun in de huidige sessie: totale tijd, de
+/// (optionele) doeltijd en de tijd per slide. Puur beschrijvend — er zit
+/// geen pacing-advies in, alleen gemeten tijd.
+@immutable
+class RehearsalRun {
+  final Duration total;
+  final Duration? target;
+  final List<SlideTiming> perSlide;
+
+  const RehearsalRun({
+    required this.total,
+    required this.target,
+    required this.perSlide,
+  });
+
+  /// Verschil t.o.v. de doeltijd: positief = over de tijd, negatief = ruim
+  /// binnen. Null wanneer er geen doeltijd was.
+  Duration? get delta => target == null ? null : total - target!;
+}

lib/models/settings.dart

@@ -8,6 +8,7 @@ class ThemeProfile {
   final bool checklistStrikeThrough;
   final String tableTextColor;
   final String tableHeaderTextColor;
+  final String tableHeaderBackgroundColor;
   final String titleBackgroundColor;
   final String titleTextColor;
   final String sectionBackgroundColor;
@@ -58,6 +59,7 @@ class ThemeProfile {
     this.checklistStrikeThrough = true,
     String? tableTextColor,
     this.tableHeaderTextColor = '#FFFFFF',
+    String? tableHeaderBackgroundColor,
     this.titleBackgroundColor = '#1C2B47',
     this.titleTextColor = '#FFFFFF',
     this.sectionBackgroundColor = '#2E7D64',
@@ -74,7 +76,9 @@ class ThemeProfile {
     this.footerPosition = 'right',
     this.closingSlideEnabled = false,
     this.closingSlideMarkdown = '# Bedankt\n\nVragen?',
-  }) : tableTextColor = tableTextColor ?? textColor;
+  }) : tableTextColor = tableTextColor ?? textColor,
+       tableHeaderBackgroundColor =
+           tableHeaderBackgroundColor ?? accentColor;
 
   static const logoPositions = [
     'top-left',
@@ -95,6 +99,7 @@ class ThemeProfile {
     bool? checklistStrikeThrough,
     String? tableTextColor,
     String? tableHeaderTextColor,
+    String? tableHeaderBackgroundColor,
     String? titleBackgroundColor,
     String? titleTextColor,
     String? sectionBackgroundColor,
@@ -126,6 +131,8 @@ class ThemeProfile {
           checklistStrikeThrough ?? this.checklistStrikeThrough,
       tableTextColor: tableTextColor ?? this.tableTextColor,
       tableHeaderTextColor: tableHeaderTextColor ?? this.tableHeaderTextColor,
+      tableHeaderBackgroundColor:
+          tableHeaderBackgroundColor ?? this.tableHeaderBackgroundColor,
       titleBackgroundColor: titleBackgroundColor ?? this.titleBackgroundColor,
       titleTextColor: titleTextColor ?? this.titleTextColor,
       sectionBackgroundColor:
@@ -158,6 +165,7 @@ class ThemeProfile {
       'checklistStrikeThrough': checklistStrikeThrough,
       'tableTextColor': tableTextColor,
       'tableHeaderTextColor': tableHeaderTextColor,
+      'tableHeaderBackgroundColor': tableHeaderBackgroundColor,
       'titleBackgroundColor': titleBackgroundColor,
       'titleTextColor': titleTextColor,
       'sectionBackgroundColor': sectionBackgroundColor,
@@ -197,6 +205,10 @@ class ThemeProfile {
           '#222222',
       tableHeaderTextColor:
           json['tableHeaderTextColor'] as String? ?? '#FFFFFF',
+      tableHeaderBackgroundColor:
+          json['tableHeaderBackgroundColor'] as String? ??
+          json['accentColor'] as String? ??
+          '#2E7D64',
       titleBackgroundColor:
           json['titleBackgroundColor'] as String? ?? '#1C2B47',
       titleTextColor: json['titleTextColor'] as String? ?? '#FFFFFF',
@@ -375,6 +387,10 @@ class AppSettings {
   /// fixed 16:9 design surface. WCAG 1.4.4 asks for text resizing up to 200%.
   final double uiTextScale;
 
+  /// Standaard doeltijd (in seconden) voor de aftelling/oefenklok in de
+  /// presenter. 0 = geen aftelling. Live aanpasbaar tijdens presenteren (K).
+  final int presentationTargetSeconds;
+
   const AppSettings({
     this.languageCode = 'nl',
     this.homeDirectory,
@@ -386,6 +402,7 @@ class AppSettings {
     this.recentFiles = const [],
     this.maxReleaseExportTlpKey,
     this.uiTextScale = 1.0,
+    this.presentationTargetSeconds = 0,
   });
 
   ThemeProfile get themeProfile {
@@ -439,6 +456,7 @@ class AppSettings {
     List<String>? recentFiles,
     String? maxReleaseExportTlpKey,
     double? uiTextScale,
+    int? presentationTargetSeconds,
     bool clearHomeDirectory = false,
     bool clearExportDirectory = false,
     bool clearMaxReleaseExportTlp = false,
@@ -477,6 +495,8 @@ class AppSettings {
           ? null
           : (maxReleaseExportTlpKey ?? this.maxReleaseExportTlpKey),
       uiTextScale: uiTextScale ?? this.uiTextScale,
+      presentationTargetSeconds:
+          presentationTargetSeconds ?? this.presentationTargetSeconds,
     );
   }
 }

lib/services/file_service.dart

@@ -883,7 +883,7 @@ th, td {
 }
 
 thead th, tr:first-child th {
-  background: ${profile.accentColor};
+  background: ${profile.tableHeaderBackgroundColor};
   color: ${profile.tableHeaderTextColor};
 }
 $logoCss

lib/services/marp_html_service.dart

@@ -626,7 +626,7 @@ class MarpHtmlService {
         '.slide blockquote{border-left:4px solid ${t.accentColor};margin:.5em 0;'
         'padding-left:16px;opacity:.85}'
         '.slide table{border-collapse:collapse}'
-        '.slide th{background:${t.sectionBackgroundColor};color:${t.tableHeaderTextColor};'
+        '.slide th{background:${t.tableHeaderBackgroundColor};color:${t.tableHeaderTextColor};'
         'border:1px solid #ccc;padding:6px 12px;font-size:20px}'
         '.slide td{color:${t.tableTextColor};border:1px solid #ccc;padding:6px 12px;font-size:20px}'
         '@media print{body{background:#fff}.slide{margin:0;box-shadow:none;'

lib/services/rehearsal_controller.dart

@@ -0,0 +1,115 @@
+import '../models/rehearsal.dart';
+
+/// Meet verstreken tijd, resterende tijd t.o.v. een doeltijd, en de tijd per
+/// slide tijdens het presenteren/oefenen.
+///
+/// Bewust *alleen een klok*: het registreert wandkloktijd en rekent geen
+/// pacing-advies uit ("ga sneller/langzamer"). Alles is sessie-only; er wordt
+/// niets gepersisteerd.
+///
+/// De klokbron is injecteerbaar ([now]) zodat de timing in tests deterministisch
+/// is — productie gebruikt [DateTime.now].
+class RehearsalController {
+  RehearsalController({DateTime Function()? now, Duration? target})
+    : _now = now ?? DateTime.now,
+      _target = (target != null && target > Duration.zero) ? target : null {
+    final t = _now();
+    _runStart = t;
+    _slideEntered = t;
+  }
+
+  final DateTime Function() _now;
+
+  Duration? _target;
+  late DateTime _runStart;
+  late DateTime _slideEntered;
+  String? _currentId;
+
+  /// Opgetelde tijd per slide-id over de hele run.
+  final Map<String, Duration> _spent = {};
+
+  /// Eerste positie waarop een slide werd gezien (voor stabiele volgorde).
+  final Map<String, int> _firstIndex = {};
+
+  /// Volgorde van eerste verschijning, voor een leesbare samenvatting.
+  final List<String> _order = [];
+
+  /// Huidige doeltijd, of null als er geen aftelling loopt.
+  Duration? get target => _target;
+
+  /// Zet de doeltijd. Een waarde van nul of minder zet de aftelling uit.
+  set target(Duration? value) =>
+      _target = (value != null && value > Duration.zero) ? value : null;
+
+  /// Verstreken tijd sinds de (her)start van de run.
+  Duration get elapsed => _now().difference(_runStart);
+
+  /// Resterende tijd t.o.v. de doeltijd; null zonder doeltijd. Kan negatief
+  /// worden wanneer je over de tijd gaat.
+  Duration? get remaining {
+    final t = _target;
+    return t == null ? null : t - elapsed;
+  }
+
+  /// Tijd op de huidige slide sinds binnenkomst.
+  Duration get currentSlideElapsed => _now().difference(_slideEntered);
+
+  /// Heeft de run genoeg gegevens om een zinvolle samenvatting te tonen?
+  /// Voorkomt een dialoog bij het meteen weer sluiten van de presentatie.
+  bool get hasMeaningfulData => _order.isNotEmpty && elapsed.inSeconds >= 10;
+
+  /// Registreer dat slide [id] op positie [index] nu zichtbaar is.
+  ///
+  /// Idempotent: alleen een échte wissel sluit de vorige slide af. Wordt elke
+  /// build aangeroepen, dus moet goedkoop blijven.
+  void observe(String id, int index) {
+    if (_currentId == id) return;
+    final t = _now();
+    final prev = _currentId;
+    if (prev != null) {
+      _spent[prev] = (_spent[prev] ?? Duration.zero) + t.difference(_slideEntered);
+    }
+    _currentId = id;
+    _slideEntered = t;
+    if (!_firstIndex.containsKey(id)) {
+      _firstIndex[id] = index;
+      _order.add(id);
+    }
+  }
+
+  /// Reset de hele run (verstreken tijd én per-slide-tijden). De doeltijd blijft
+  /// staan. De eerstvolgende [observe] registreert de huidige slide opnieuw.
+  void reset() {
+    final t = _now();
+    _runStart = t;
+    _slideEntered = t;
+    _spent.clear();
+    _firstIndex.clear();
+    _order.clear();
+    _currentId = null;
+  }
+
+  /// Sluit de lopende slide af en geef de samenvatting van deze run terug.
+  /// Niet-destructief: je kunt erna gewoon doorpresenteren.
+  RehearsalRun finish() {
+    final t = _now();
+    final spent = Map<String, Duration>.from(_spent);
+    final cur = _currentId;
+    if (cur != null) {
+      spent[cur] = (spent[cur] ?? Duration.zero) + t.difference(_slideEntered);
+    }
+    final perSlide = [
+      for (final id in _order)
+        SlideTiming(
+          slideId: id,
+          index: _firstIndex[id] ?? 0,
+          spent: spent[id] ?? Duration.zero,
+        ),
+    ];
+    return RehearsalRun(
+      total: t.difference(_runStart),
+      target: _target,
+      perSlide: perSlide,
+    );
+  }
+}

lib/state/settings_provider.dart

@@ -56,6 +56,8 @@ class SettingsNotifier extends StateNotifier<AppSettings> {
       recentFiles: prefs.getStringList('recentFiles') ?? [],
       maxReleaseExportTlpKey: prefs.getString('maxReleaseExportTlp'),
       uiTextScale: (prefs.getDouble('uiTextScale') ?? 1.0).clamp(1.0, 2.0),
+      presentationTargetSeconds: (prefs.getInt('presentationTargetSeconds') ?? 0)
+          .clamp(0, 86400),
     );
   }
 
@@ -80,6 +82,15 @@ class SettingsNotifier extends StateNotifier<AppSettings> {
     await prefs.setDouble('uiTextScale', clamped);
   }
 
+  /// Stel de standaard doeltijd (in seconden) voor de presenter-aftelling in.
+  /// 0 = geen aftelling. Begrensd tot een etmaal tegen onzin-invoer.
+  Future<void> setPresentationTargetSeconds(int seconds) async {
+    final clamped = seconds.clamp(0, 86400);
+    state = state.copyWith(presentationTargetSeconds: clamped);
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setInt('presentationTargetSeconds', clamped);
+  }
+
   Future<void> addRecentFile(String path) async {
     final updated = [
       path,

lib/widgets/app_shell.dart

@@ -528,6 +528,10 @@ class _MainLayoutState extends ConsumerState<_MainLayout> {
         themeProfile: deck.themeProfile,
         initialIndex: initial,
         tlp: deck.tlp,
+        targetDuration: () {
+          final secs = ref.read(settingsProvider).presentationTargetSeconds;
+          return secs > 0 ? Duration(seconds: secs) : null;
+        }(),
         annotations: deck.annotations,
         onAnnotationsChanged: deckNotifier.setAnnotations,
         onSlideChanged: (updated) {

lib/widgets/dialogs/settings_dialog.dart

@@ -450,6 +450,18 @@ class _SettingsDialogState extends ConsumerState<SettingsDialog> {
           ),
         ),
         const SizedBox(height: 16),
+        _sectionTitle(l10n.d('Presentatie')),
+        _presentationTargetField(),
+        Padding(
+          padding: const EdgeInsets.only(top: 6),
+          child: Text(
+            l10n.d(
+              'Standaard doeltijd voor de aftelling in de presenter. Tijdens presenteren fijn af te stellen met de toets K.',
+            ),
+            style: const TextStyle(fontSize: 11, color: Color(0xFF94A3B8)),
+          ),
+        ),
+        const SizedBox(height: 16),
         _sectionTitle(l10n.t('presentationFolder')),
         Row(
           children: [
@@ -544,6 +556,49 @@ class _SettingsDialogState extends ConsumerState<SettingsDialog> {
     );
   }
 
+  /// Dropdown met veelgebruikte doeltijden voor de presenter-aftelling. De
+  /// opgeslagen waarde snapt naar de dichtstbijzijnde optie; fijnregelen kan
+  /// live met toets K tijdens het presenteren.
+  Widget _presentationTargetField() {
+    final l10n = context.l10n;
+    const steps = [0, 300, 600, 900, 1200, 1500, 1800, 2700, 3600, 5400];
+    final current = ref.watch(
+      settingsProvider.select((s) => s.presentationTargetSeconds),
+    );
+    final value = steps.reduce(
+      (a, b) => (a - current).abs() <= (b - current).abs() ? a : b,
+    );
+    return InputDecorator(
+      decoration: InputDecoration(
+        labelText: l10n.d('Doeltijd (aftellen)'),
+        isDense: true,
+        prefixIcon: const Icon(Icons.timer_outlined, size: 18),
+      ),
+      child: DropdownButtonHideUnderline(
+        child: DropdownButton<int>(
+          value: value,
+          isExpanded: true,
+          isDense: true,
+          items: [
+            for (final step in steps)
+              DropdownMenuItem(
+                value: step,
+                child: Text(
+                  step == 0 ? l10n.d('Geen aftelling') : '${step ~/ 60} min',
+                ),
+              ),
+          ],
+          onChanged: (seconds) {
+            if (seconds == null) return;
+            ref
+                .read(settingsProvider.notifier)
+                .setPresentationTargetSeconds(seconds);
+          },
+        ),
+      ),
+    );
+  }
+
   Widget _appearanceTab() {
     final l10n = context.l10n;
     final profiles = ref.watch(settingsProvider).appAppearanceProfiles;
@@ -1047,6 +1102,14 @@ class _SettingsDialogState extends ConsumerState<SettingsDialog> {
               _themeProfile = _themeProfile.copyWith(tableHeaderTextColor: v),
         ),
         const SizedBox(height: 12),
+        _colorSetting(
+          l10n.d('Tabel kopachtergrond'),
+          _themeProfile.tableHeaderBackgroundColor,
+          (v) => _themeProfile = _themeProfile.copyWith(
+            tableHeaderBackgroundColor: v,
+          ),
+        ),
+        const SizedBox(height: 12),
         _colorSetting(
           l10n.d('Titelachtergrond'),
           _themeProfile.titleBackgroundColor,

lib/widgets/presentation/fullscreen_presenter.dart

@@ -13,6 +13,7 @@ import '../../models/deck.dart';
 import '../../models/settings.dart';
 import '../../models/slide.dart';
 import '../../services/markdown_service.dart';
+import '../../services/rehearsal_controller.dart';
 import '../../utils/log.dart';
 import '../../utils/url_launcher_util.dart';
 import '../../l10n/app_localizations.dart';
@@ -20,6 +21,7 @@ import '../slides/inline_markdown.dart';
 import '../slides/slide_preview.dart';
 import 'annotation_overlay.dart';
 import 'audience_window.dart';
+import 'rehearsal_summary.dart';
 
 /// Blanco-schermstand tijdens het presenteren (zoals B/W in PowerPoint).
 enum _Blank { none, black, white }
@@ -31,6 +33,10 @@ class FullscreenPresenter extends StatefulWidget {
   final int initialIndex;
   final TlpLevel tlp;
 
+  /// Optionele doeltijd voor de aftelling/oefenklok. Null = geen aftelling.
+  /// Sessie-only; live aanpasbaar in de presenter (toets K).
+  final Duration? targetDuration;
+
   /// When set, this presenter drives a separate audience (beamer) window: the
   /// laptop shows the presenter view, the slide goes to [audienceWindow]. Null
   /// for the classic single-screen mode.
@@ -49,6 +55,7 @@ class FullscreenPresenter extends StatefulWidget {
     required this.themeProfile,
     required this.initialIndex,
     this.tlp = TlpLevel.none,
+    this.targetDuration,
     this.audienceWindow,
     this.initialAnnotations = const {},
     this.onAnnotationsChanged,
@@ -65,6 +72,7 @@ class FullscreenPresenter extends StatefulWidget {
     required ThemeProfile themeProfile,
     required int initialIndex,
     TlpLevel tlp = TlpLevel.none,
+    Duration? targetDuration,
     Map<String, List<InkStroke>> annotations = const {},
     void Function(Map<String, List<InkStroke>>)? onAnnotationsChanged,
     ValueChanged<Slide>? onSlideChanged,
@@ -94,6 +102,7 @@ class FullscreenPresenter extends StatefulWidget {
         themeProfile: themeProfile,
         initialIndex: initialIndex,
         tlp: tlp,
+        targetDuration: targetDuration,
         annotations: annotations,
         onAnnotationsChanged: onAnnotationsChanged,
         onSlideChanged: onSlideChanged,
@@ -106,6 +115,7 @@ class FullscreenPresenter extends StatefulWidget {
         themeProfile: themeProfile,
         initialIndex: initialIndex,
         tlp: tlp,
+        targetDuration: targetDuration,
         annotations: annotations,
         onAnnotationsChanged: onAnnotationsChanged,
         onSlideChanged: onSlideChanged,
@@ -120,6 +130,7 @@ class FullscreenPresenter extends StatefulWidget {
     required ThemeProfile themeProfile,
     required int initialIndex,
     TlpLevel tlp = TlpLevel.none,
+    Duration? targetDuration,
     Map<String, List<InkStroke>> annotations = const {},
     void Function(Map<String, List<InkStroke>>)? onAnnotationsChanged,
     ValueChanged<Slide>? onSlideChanged,
@@ -139,6 +150,7 @@ class FullscreenPresenter extends StatefulWidget {
               themeProfile: themeProfile,
               initialIndex: initialIndex,
               tlp: tlp,
+              targetDuration: targetDuration,
               initialAnnotations: annotations,
               onAnnotationsChanged: onAnnotationsChanged,
               onSlideChanged: onSlideChanged,
@@ -165,6 +177,7 @@ class FullscreenPresenter extends StatefulWidget {
     required ThemeProfile themeProfile,
     required int initialIndex,
     TlpLevel tlp = TlpLevel.none,
+    Duration? targetDuration,
     Map<String, List<InkStroke>> annotations = const {},
     void Function(Map<String, List<InkStroke>>)? onAnnotationsChanged,
     ValueChanged<Slide>? onSlideChanged,
@@ -341,13 +354,19 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
   double _gridRowExtent = 220;
   final ScrollController _gridScroll = ScrollController();
 
-  /// Starttijd voor de verstreken-tijd-teller (resetbaar met R).
+  /// Oefenklok: verstreken tijd, aftelling en per-slide-tijd. Sessie-only,
-  late DateTime _startTime;
+  /// puur meten (geen pacing). Resetbaar met R.
+  late RehearsalController _rehearsal;
 
   /// Getypte cijfers om naar een slidenummer te springen (leeg = niet actief).
   String _typed = '';
   Timer? _typedTimer;
 
+  /// Doeltijd-invoermodus (toets K): cijfers worden als MMSS gelezen i.p.v. als
+  /// slidenummer. [_targetTyped] houdt de invoer tot Enter/Esc.
+  bool _targetInput = false;
+  String _targetTyped = '';
+
   /// Sneltoets-overzicht (cheatsheet) zichtbaar.
   bool _helpOpen = false;
 
@@ -400,7 +419,7 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
   void initState() {
     super.initState();
     _index = widget.initialIndex;
-    _startTime = DateTime.now();
+    _rehearsal = RehearsalController(target: widget.targetDuration);
     _focusNode = FocusNode();
     _ink = {
       for (final e in widget.initialAnnotations.entries)
@@ -757,6 +776,7 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
 
   Future<void> _exit() async {
     _advanceTimer?.cancel();
+    await _maybeShowRehearsalSummary();
     final aw = widget.audienceWindow;
     if (aw != null) {
       // Dual mode: the main window was never put in full screen; just tear down
@@ -769,6 +789,14 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
     if (mounted) Navigator.pop(context);
   }
 
+  /// Toon na afloop de oefenrun-samenvatting, mits er genoeg gemeten is.
+  /// Sessie-only: niets wordt opgeslagen.
+  Future<void> _maybeShowRehearsalSummary() async {
+    if (!mounted || !_rehearsal.hasMeaningfulData) return;
+    final run = _rehearsal.finish();
+    await showRehearsalSummary(context, run: run, slides: widget.slides);
+  }
+
   /// Meld de slidewissel aan schermlezers (WCAG 4.1.3, statusberichten):
   /// visueel verandert de hele slide, maar zonder aankondiging merkt een
   /// schermlezer-gebruiker de wissel niet op.
@@ -815,7 +843,40 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
   }
 
   void _resetTimer() {
-    setState(() => _startTime = DateTime.now());
+    setState(() => _rehearsal.reset());
+  }
+
+  /// Open de doeltijd-invoer (toets K): cijfers worden voortaan als MMSS
+  /// gelezen. Een lege invoer laat de huidige doeltijd ongemoeid.
+  void _beginTargetInput() {
+    _clearTyped();
+    setState(() {
+      _targetInput = true;
+      _targetTyped = '';
+    });
+  }
+
+  void _cancelTargetInput() {
+    setState(() {
+      _targetInput = false;
+      _targetTyped = '';
+    });
+  }
+
+  /// Lees [_targetTyped] als MMSS en zet de doeltijd. Leeg = ongewijzigd,
+  /// nul = aftelling uit.
+  void _commitTarget() {
+    final raw = _targetTyped;
+    setState(() {
+      _targetInput = false;
+      _targetTyped = '';
+    });
+    if (raw.isEmpty) return;
+    final n = int.tryParse(raw) ?? 0;
+    final secs = (n ~/ 100) * 60 + (n % 100);
+    setState(
+      () => _rehearsal.target = secs <= 0 ? null : Duration(seconds: secs),
+    );
   }
 
   void _toggleHelp() {
@@ -957,6 +1018,9 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
       return KeyEventResult.handled;
     }
 
+    // Doeltijd-invoer vangt cijfers/Enter/Esc tot de invoer klaar is.
+    if (_targetInput) return _handleTargetKey(key);
+
     // Terwijl het raster open is, sturen de pijltjes een aparte cursor aan.
     if (_gridOpen) return _handleGridKey(key);
 
@@ -1008,6 +1072,9 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
       case LogicalKeyboardKey.keyR:
         _resetTimer();
         return KeyEventResult.handled;
+      case LogicalKeyboardKey.keyK:
+        _beginTargetInput();
+        return KeyEventResult.handled;
       case LogicalKeyboardKey.keyB:
         _toggleBlank(_Blank.black);
         return KeyEventResult.handled;
@@ -1062,6 +1129,41 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
     }
   }
 
+  /// Toetsen terwijl de doeltijd wordt ingevoerd (MMSS). Alles wordt
+  /// opgeslokt zodat losse cijfers niet als slidesprong gelden.
+  KeyEventResult _handleTargetKey(LogicalKeyboardKey key) {
+    final digit = _digits[key];
+    if (digit != null) {
+      setState(() {
+        _targetTyped += digit;
+        if (_targetTyped.length > 4) {
+          _targetTyped = _targetTyped.substring(_targetTyped.length - 4);
+        }
+      });
+      return KeyEventResult.handled;
+    }
+    switch (key) {
+      case LogicalKeyboardKey.enter:
+      case LogicalKeyboardKey.numpadEnter:
+      case LogicalKeyboardKey.keyK:
+        _commitTarget();
+      case LogicalKeyboardKey.backspace:
+        if (_targetTyped.isNotEmpty) {
+          setState(
+            () => _targetTyped = _targetTyped.substring(
+              0,
+              _targetTyped.length - 1,
+            ),
+          );
+        }
+      case LogicalKeyboardKey.escape:
+        _cancelTargetInput();
+      default:
+        break;
+    }
+    return KeyEventResult.handled;
+  }
+
   /// Toetsen terwijl het rasteroverzicht open is.
   KeyEventResult _handleGridKey(LogicalKeyboardKey key) {
     final last = widget.slides.length - 1;
@@ -1105,6 +1207,12 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
     return d.inHours > 0 ? '${d.inHours}:$mm:$ss' : '$mm:$ss';
   }
 
+  /// Resterende tijd, met minteken zodra je over de doeltijd gaat.
+  String _fmtRemaining(Duration d) {
+    final body = _fmtElapsed(d.abs());
+    return d.isNegative ? '-$body' : body;
+  }
+
   @override
   Widget build(BuildContext context) {
     final total = widget.slides.length;
@@ -1116,6 +1224,11 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
     // Keep the beamer window in step with whatever index/blank we now show.
     _syncAudience();
 
+    // Per-slide-timing: registreer de huidige slide. Idempotent en goedkoop,
+    // dus veilig om elke build aan te roepen — vangt álle navigatiepaden.
+    final clampedIndex = _index.clamp(0, total - 1);
+    _rehearsal.observe(widget.slides[clampedIndex].id, clampedIndex);
+
     return Focus(
       focusNode: _focusNode,
       autofocus: true,
@@ -1142,6 +1255,13 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
                 bottom: 60,
                 child: Center(child: _buildTypedBadge(total)),
               ),
+            if (_targetInput)
+              Positioned(
+                left: 0,
+                right: 0,
+                bottom: 60,
+                child: Center(child: _buildTargetBadge()),
+              ),
             if (_helpOpen) Positioned.fill(child: _buildHelpOverlay()),
           ],
         ),
@@ -1270,6 +1390,42 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
     );
   }
 
+  /// Badge tijdens het invoeren van de doeltijd ("Doeltijd 20:00 · Enter").
+  /// Cijfers schuiven van rechts in als MM:SS (zoals een magnetron).
+  Widget _buildTargetBadge() {
+    final padded = _targetTyped.padLeft(4, '0');
+    final preview = '${padded.substring(0, 2)}:${padded.substring(2)}';
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
+      decoration: BoxDecoration(
+        color: Colors.black.withValues(alpha: 0.82),
+        borderRadius: BorderRadius.circular(12),
+        border: Border.all(color: const Color(0xFFF59E0B), width: 1.5),
+      ),
+      child: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          const Icon(Icons.timer_outlined, color: Color(0xFFF59E0B), size: 20),
+          const SizedBox(width: 10),
+          Text(
+            preview,
+            style: const TextStyle(
+              color: Colors.white,
+              fontSize: 26,
+              fontWeight: FontWeight.w700,
+              fontFeatures: [FontFeature.tabularFigures()],
+            ),
+          ),
+          const SizedBox(width: 12),
+          Text(
+            '${context.l10n.d('Doeltijd')} · Enter · 0 = ${context.l10n.d('uit')}',
+            style: const TextStyle(color: Colors.white38, fontSize: 13),
+          ),
+        ],
+      ),
+    );
+  }
+
   /// Sneltoets-overzicht (cheatsheet).
   Widget _buildHelpOverlay() {
     final l10n = context.l10n;
@@ -1284,7 +1440,8 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
       ('B · W', l10n.d('Zwart · wit scherm')),
       ('D · T · E', l10n.d('Pen · markeerstift · gum')),
       ('X · C', l10n.d('Laser · annotaties wissen')),
-      ('R', l10n.d('Verstreken tijd resetten')),
+      ('K', l10n.d('Doeltijd / aftellen instellen (MMSS)')),
+      ('R', l10n.d('Tijd & oefenrun resetten')),
       ('A', l10n.d('Automatische modus aan/uit')),
       ('L', l10n.d('Herhalen (loop) aan/uit')),
       ('M', l10n.d('Na media automatisch doorgaan')),
@@ -1584,9 +1741,41 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
     );
   }
 
+  /// Eén tijdwaarde met bijschrift voor de klokbalk.
+  Widget _metric(
+    String label,
+    String value, {
+    Color? color,
+    CrossAxisAlignment align = CrossAxisAlignment.start,
+    double size = 24,
+  }) {
+    return Column(
+      crossAxisAlignment: align,
+      children: [
+        Text(
+          label,
+          style: const TextStyle(color: Colors.white38, fontSize: 10),
+        ),
+        const SizedBox(height: 2),
+        Text(
+          value,
+          style: TextStyle(
+            color: color ?? Colors.white,
+            fontSize: size,
+            fontWeight: FontWeight.w600,
+            fontFeatures: const [FontFeature.tabularFigures()],
+          ),
+        ),
+      ],
+    );
+  }
+
   Widget _buildClockBar() {
     final l10n = context.l10n;
-    final elapsed = DateTime.now().difference(_startTime);
+    final elapsed = _rehearsal.elapsed;
+    final remaining = _rehearsal.remaining;
+    final slideElapsed = _rehearsal.currentSlideElapsed;
+    final overtime = remaining != null && remaining.isNegative;
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
       decoration: BoxDecoration(
@@ -1594,59 +1783,64 @@ class _FullscreenPresenterState extends State<FullscreenPresenter> {
         borderRadius: BorderRadius.circular(8),
         border: Border.all(color: const Color(0xFF262626)),
       ),
-      child: Row(
+      child: Column(
         children: [
-          // Verstreken tijd
+          // Bovenrij: verstreken tijd, knoppen, wandklok.
-          Expanded(
+          Row(
-            child: Column(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Text(
-                  l10n.d('Verstreken'),
-                  style: const TextStyle(color: Colors.white38, fontSize: 10),
-                ),
-                const SizedBox(height: 2),
-                Text(
-                  _fmtElapsed(elapsed),
-                  style: const TextStyle(
-                    color: Colors.white,
-                    fontSize: 24,
-                    fontWeight: FontWeight.w600,
-                    fontFeatures: [FontFeature.tabularFigures()],
-                  ),
-                ),
-              ],
-            ),
-          ),
-          // Reset-knop
-          Tooltip(
-            message: l10n.d('Tijd resetten (R)'),
-            child: IconButton(
-              onPressed: _resetTimer,
-              icon: const Icon(Icons.restart_alt, size: 18),
-              color: Colors.white38,
-              visualDensity: VisualDensity.compact,
-            ),
-          ),
-          const SizedBox(width: 4),
-          // Wandklok
-          Column(
-            crossAxisAlignment: CrossAxisAlignment.end,
             children: [
-              Text(
+              Expanded(
-                l10n.d('Klok'),
+                child: _metric(l10n.d('Verstreken'), _fmtElapsed(elapsed)),
-                style: const TextStyle(color: Colors.white38, fontSize: 10),
               ),
-              const SizedBox(height: 2),
+              Tooltip(
-              Text(
+                message: l10n.d('Doeltijd / aftellen (K)'),
-                _fmtClock(DateTime.now()),
+                child: IconButton(
-                style: const TextStyle(
+                  onPressed: _beginTargetInput,
-                  color: Colors.white70,
+                  icon: const Icon(Icons.timer_outlined, size: 18),
-                  fontSize: 24,
+                  color: Colors.white38,
-                  fontWeight: FontWeight.w600,
+                  visualDensity: VisualDensity.compact,
-                  fontFeatures: [FontFeature.tabularFigures()],
                 ),
               ),
+              Tooltip(
+                message: l10n.d('Tijd resetten (R)'),
+                child: IconButton(
+                  onPressed: _resetTimer,
+                  icon: const Icon(Icons.restart_alt, size: 18),
+                  color: Colors.white38,
+                  visualDensity: VisualDensity.compact,
+                ),
+              ),
+              const SizedBox(width: 4),
+              _metric(
+                l10n.d('Klok'),
+                _fmtClock(DateTime.now()),
+                color: Colors.white70,
+                align: CrossAxisAlignment.end,
+              ),
+            ],
+          ),
+          const Divider(height: 18, color: Color(0xFF262626)),
+          // Onderrij: aftelling (resterend/over) en tijd op huidige slide.
+          Row(
+            children: [
+              Expanded(
+                child: _metric(
+                  overtime ? l10n.d('Over de tijd') : l10n.d('Resterend'),
+                  remaining == null ? '–:––' : _fmtRemaining(remaining),
+                  color: remaining == null
+                      ? Colors.white24
+                      : (overtime
+                            ? const Color(0xFFEF4444)
+                            : const Color(0xFF22C55E)),
+                  size: 20,
+                ),
+              ),
+              _metric(
+                l10n.d('Deze slide'),
+                _fmtElapsed(slideElapsed),
+                color: Colors.white70,
+                align: CrossAxisAlignment.end,
+                size: 20,
+              ),
             ],
           ),
         ],

lib/widgets/presentation/rehearsal_summary.dart

@@ -0,0 +1,178 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import '../../l10n/app_localizations.dart';
+import '../../models/rehearsal.dart';
+import '../../models/slide.dart';
+
+/// Toon de samenvatting van een oefenrun (sessie-only). Beschrijvend: totale
+/// tijd, doeltijd en de tijd per slide — geen pacing-oordeel.
+Future<void> showRehearsalSummary(
+  BuildContext context, {
+  required RehearsalRun run,
+  required List<Slide> slides,
+}) {
+  return showDialog<void>(
+    context: context,
+    builder: (_) => _RehearsalSummaryDialog(run: run, slides: slides),
+  );
+}
+
+String _fmt(Duration d) {
+  final neg = d.isNegative;
+  final a = d.abs();
+  final mm = (a.inMinutes % 60).toString().padLeft(2, '0');
+  final ss = (a.inSeconds % 60).toString().padLeft(2, '0');
+  final body = a.inHours > 0 ? '${a.inHours}:$mm:$ss' : '$mm:$ss';
+  return neg ? '-$body' : body;
+}
+
+class _RehearsalSummaryDialog extends StatelessWidget {
+  final RehearsalRun run;
+  final List<Slide> slides;
+
+  const _RehearsalSummaryDialog({required this.run, required this.slides});
+
+  String _label(SlideTiming t) {
+    final slide = slides.firstWhere(
+      (s) => s.id == t.slideId,
+      orElse: () => slides.isNotEmpty ? slides.first : (throw StateError('')),
+    );
+    final title = slide.title.trim();
+    return title.isEmpty ? '${t.index + 1}.' : '${t.index + 1}. $title';
+  }
+
+  Future<void> _copy(BuildContext context) async {
+    final l10n = context.l10n;
+    final buf = StringBuffer()
+      ..writeln('${l10n.d('Totaal')}: ${_fmt(run.total)}');
+    if (run.target != null) {
+      buf.writeln('${l10n.d('Doeltijd')}: ${_fmt(run.target!)}');
+    }
+    buf.writeln('');
+    for (final t in run.perSlide) {
+      buf.writeln('${_label(t)}\t${_fmt(t.spent)}');
+    }
+    await Clipboard.setData(ClipboardData(text: buf.toString()));
+    if (context.mounted) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text(l10n.d('Tijden gekopieerd naar klembord.'))),
+      );
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = context.l10n;
+    final delta = run.delta;
+    return AlertDialog(
+      title: Text(l10n.d('Oefenrun')),
+      content: SizedBox(
+        width: 420,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            // Totaal vs. doeltijd.
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                Text(
+                  l10n.d('Totale tijd'),
+                  style: const TextStyle(fontWeight: FontWeight.w600),
+                ),
+                Text(
+                  _fmt(run.total),
+                  style: const TextStyle(
+                    fontWeight: FontWeight.w700,
+                    fontFeatures: [FontFeature.tabularFigures()],
+                  ),
+                ),
+              ],
+            ),
+            if (run.target != null) ...[
+              const SizedBox(height: 4),
+              Row(
+                mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                children: [
+                  Text(l10n.d('Doeltijd')),
+                  Text(
+                    _fmt(run.target!),
+                    style: const TextStyle(
+                      fontFeatures: [FontFeature.tabularFigures()],
+                    ),
+                  ),
+                ],
+              ),
+              if (delta != null) ...[
+                const SizedBox(height: 4),
+                Row(
+                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                  children: [
+                    Text(
+                      delta.isNegative
+                          ? l10n.d('Binnen de tijd')
+                          : l10n.d('Over de tijd'),
+                    ),
+                    Text(
+                      _fmt(delta),
+                      style: TextStyle(
+                        fontWeight: FontWeight.w600,
+                        color: delta.isNegative
+                            ? Colors.green.shade700
+                            : Colors.red.shade700,
+                        fontFeatures: const [FontFeature.tabularFigures()],
+                      ),
+                    ),
+                  ],
+                ),
+              ],
+            ],
+            const Divider(height: 24),
+            Flexible(
+              child: run.perSlide.isEmpty
+                  ? Text(l10n.d('Geen slides gemeten.'))
+                  : ListView.builder(
+                      shrinkWrap: true,
+                      itemCount: run.perSlide.length,
+                      itemBuilder: (_, i) {
+                        final t = run.perSlide[i];
+                        return Padding(
+                          padding: const EdgeInsets.symmetric(vertical: 3),
+                          child: Row(
+                            children: [
+                              Expanded(
+                                child: Text(
+                                  _label(t),
+                                  maxLines: 1,
+                                  overflow: TextOverflow.ellipsis,
+                                ),
+                              ),
+                              const SizedBox(width: 12),
+                              Text(
+                                _fmt(t.spent),
+                                style: const TextStyle(
+                                  fontFeatures: [FontFeature.tabularFigures()],
+                                ),
+                              ),
+                            ],
+                          ),
+                        );
+                      },
+                    ),
+            ),
+          ],
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: () => _copy(context),
+          child: Text(l10n.d('Kopieer')),
+        ),
+        FilledButton(
+          onPressed: () => Navigator.of(context).pop(),
+          child: Text(l10n.d('Sluiten')),
+        ),
+      ],
+    );
+  }
+}

lib/widgets/slides/previews/table_preview.dart

@@ -35,6 +35,7 @@ class _TablePreview extends StatelessWidget {
     final accent = _hexColor(profile.accentColor);
     final textColor = _hexColor(profile.tableTextColor);
     final headerTextColor = _hexColor(profile.tableHeaderTextColor);
+    final headerBackground = _hexColor(profile.tableHeaderBackgroundColor);
     final borderColor = accent.withValues(alpha: 0.35);
 
     Widget cell(String value, {required bool header}) {
@@ -61,7 +62,7 @@ class _TablePreview extends StatelessWidget {
 
     TableRow buildRow(List<String> row, {required bool header}) {
       return TableRow(
-        decoration: BoxDecoration(color: header ? accent : null),
+        decoration: BoxDecoration(color: header ? headerBackground : null),
         children: List.generate(colCount, (c) {
           final value = c < row.length ? row[c] : '';
           return TableCell(

test/rehearsal_controller_test.dart

@@ -0,0 +1,90 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ocideck/services/rehearsal_controller.dart';
+
+void main() {
+  // Bestuurbare klok zodat de timing deterministisch is.
+  late DateTime now;
+  DateTime clock() => now;
+
+  setUp(() => now = DateTime(2026, 1, 1, 10, 0, 0));
+  void advance(Duration d) => now = now.add(d);
+
+  test('elapsed loopt met de klok mee', () {
+    final c = RehearsalController(now: clock);
+    expect(c.elapsed, Duration.zero);
+    advance(const Duration(seconds: 90));
+    expect(c.elapsed, const Duration(seconds: 90));
+  });
+
+  test('per-slide-tijd telt op per slide en houdt volgorde aan', () {
+    final c = RehearsalController(now: clock);
+    c.observe('a', 0);
+    advance(const Duration(seconds: 30));
+    c.observe('b', 1);
+    advance(const Duration(seconds: 20));
+    c.observe('a', 0); // terug naar a
+    advance(const Duration(seconds: 10));
+
+    final run = c.finish();
+    expect(run.total, const Duration(seconds: 60));
+    expect(run.perSlide.map((t) => t.slideId).toList(), ['a', 'b']);
+    expect(run.perSlide[0].spent, const Duration(seconds: 40)); // 30 + 10
+    expect(run.perSlide[1].spent, const Duration(seconds: 20));
+  });
+
+  test('observe is idempotent: dezelfde slide sluit niet af', () {
+    final c = RehearsalController(now: clock);
+    c.observe('a', 0);
+    advance(const Duration(seconds: 5));
+    c.observe('a', 0); // geen wissel
+    advance(const Duration(seconds: 5));
+    expect(c.currentSlideElapsed, const Duration(seconds: 10));
+  });
+
+  test('aftelling: resterend wordt negatief na de doeltijd', () {
+    final c = RehearsalController(now: clock, target: const Duration(minutes: 1));
+    advance(const Duration(seconds: 40));
+    expect(c.remaining, const Duration(seconds: 20));
+    advance(const Duration(seconds: 30));
+    expect(c.remaining, const Duration(seconds: -10));
+  });
+
+  test('geen doeltijd → geen resterende tijd; nul-target zet aftelling uit', () {
+    final c = RehearsalController(now: clock);
+    expect(c.remaining, isNull);
+    c.target = Duration.zero;
+    expect(c.target, isNull);
+    c.target = const Duration(minutes: 5);
+    expect(c.target, const Duration(minutes: 5));
+  });
+
+  test('reset wist run en per-slide-tijden, behoudt doeltijd', () {
+    final c = RehearsalController(now: clock, target: const Duration(minutes: 1));
+    c.observe('a', 0);
+    advance(const Duration(seconds: 30));
+    c.reset();
+    expect(c.elapsed, Duration.zero);
+    expect(c.target, const Duration(minutes: 1));
+    // Na reset is er nog geen geregistreerde slide.
+    advance(const Duration(seconds: 5));
+    expect(c.finish().perSlide, isEmpty);
+  });
+
+  test('hasMeaningfulData vereist een slide én ≥10s', () {
+    final c = RehearsalController(now: clock);
+    expect(c.hasMeaningfulData, isFalse);
+    c.observe('a', 0);
+    advance(const Duration(seconds: 9));
+    expect(c.hasMeaningfulData, isFalse);
+    advance(const Duration(seconds: 1));
+    expect(c.hasMeaningfulData, isTrue);
+  });
+
+  test('delta beschrijft over/onder de doeltijd', () {
+    final c = RehearsalController(now: clock, target: const Duration(minutes: 1));
+    c.observe('a', 0);
+    advance(const Duration(seconds: 70));
+    final run = c.finish();
+    expect(run.delta, const Duration(seconds: 10)); // over de tijd
+  });
+}