refactor(slideshow): watermark look lives only in global settings (+ size)

The watermark look (logo / position / opacity / style) was configurable in three
places — the global Settings tab, the per-event-type preset, and the per-event
card. Consolidate it to ONE: the global Settings -> Slideshow tab. Per-event and
per-event-type now carry only the watermark MODE (inherit / on / off) — the
override structure — and render with the global look.

- New global "Size (% of screen)" control (slideshow_watermark_size, vmin-based)
  so the logo can be scaled; resolved server-side into the watermark payload and
  applied to the kiosk <img>.
- Backend slideshowSettings resolves the whole look from app_settings always;
  per-event show_watermark only toggles enabled. adminEvents PATCH + type-preset
  seeding no longer accept/seed per-event look fields; unused enums removed.
- Frontend SlideshowStyle drops the look fields (mode only); SlideshowStyleFields
  watermark section is a single mode select with a "configured under Settings"
  hint; SlideshowSettingsCard + Event type cleaned up.
- en/de: watermarkSizeLabel + watermarkModeHint.

(events.show_watermark_{source,position,opacity,style} columns from migration
138 are left in place but inert — the look is global now.)

backend/src/routes/adminEvents.js

@@ -697,10 +697,6 @@ router.post('/', adminAuth, requirePermission('events.create'), [
             show_transition: oneOf(preset.transition, SLIDESHOW_TRANSITIONS),
             show_transition_ms: intP(preset.transition_ms, 100, 5000),
             show_watermark: watermarkSeed,
-            show_watermark_source: oneOf(preset.watermark_source, SLIDESHOW_WATERMARK_SOURCES),
-            show_watermark_position: oneOf(preset.watermark_position, SLIDESHOW_WATERMARK_POSITIONS),
-            show_watermark_opacity: intP(preset.watermark_opacity, 0, 100),
-            show_watermark_style: oneOf(preset.watermark_style, SLIDESHOW_WATERMARK_STYLES),
             show_colorfilter: oneOf(preset.colorfilter, SLIDESHOW_COLORFILTERS),
           };
           // Only carry through fields the preset actually set.
@@ -1908,12 +1904,9 @@ router.post('/:id/toggle-status', adminAuth, requirePermission('events.edit'), r
 const SLIDESHOW_TRANSITIONS = ['crossfade', 'cut', 'slide', 'kenburns', 'dipwhite', 'dipblack'];
 // Allowed per-slide color filters.
 const SLIDESHOW_COLORFILTERS = ['none', 'bw', 'sepia', 'warm', 'cool', 'vignette'];
-// Allowed watermark logo sources + corners.
-const SLIDESHOW_WATERMARK_SOURCES = ['logo', 'logo_dark', 'favicon', 'event'];
-const SLIDESHOW_WATERMARK_POSITIONS = ['top-left', 'top-right', 'bottom-left', 'bottom-right'];
-// 'white' recolors the logo white; 'original' keeps its own colors (for boxed
-// / colored logos that would otherwise whiten into a solid blob).
-const SLIDESHOW_WATERMARK_STYLES = ['white', 'original'];
+// The watermark LOOK (source/position/opacity/style/size) is global-only
+// (app_settings, Settings → Slideshow); events only carry the show_watermark
+// mode (NULL=inherit / true / false), so no per-event look enums live here.
 
 // Build the public slideshow URL for a freshly-minted/existing token.
 async function buildSlideshowUrl(slug, token) {
@@ -2000,10 +1993,6 @@ router.patch('/:id/slideshow', adminAuth, requirePermission('events.edit'), requ
   body('show_transition').optional().isIn(SLIDESHOW_TRANSITIONS),
   body('show_transition_ms').optional().isInt({ min: 100, max: 5000 }),
   body('show_watermark').optional({ nullable: true }),
-  body('show_watermark_source').optional().isIn(SLIDESHOW_WATERMARK_SOURCES),
-  body('show_watermark_position').optional().isIn(SLIDESHOW_WATERMARK_POSITIONS),
-  body('show_watermark_opacity').optional().isInt({ min: 0, max: 100 }),
-  body('show_watermark_style').optional().isIn(SLIDESHOW_WATERMARK_STYLES),
   body('show_colorfilter').optional().isIn(SLIDESHOW_COLORFILTERS)
 ], async (req, res) => {
   try {
@@ -2028,10 +2017,6 @@ router.patch('/:id/slideshow', adminAuth, requirePermission('events.edit'), requ
         ? null
         : formatBoolean(parseBooleanInput(req.body.show_watermark, false));
     }
-    if (req.body.show_watermark_source !== undefined) updates.show_watermark_source = req.body.show_watermark_source;
-    if (req.body.show_watermark_position !== undefined) updates.show_watermark_position = req.body.show_watermark_position;
-    if (req.body.show_watermark_opacity !== undefined) updates.show_watermark_opacity = parseInt(req.body.show_watermark_opacity, 10);
-    if (req.body.show_watermark_style !== undefined) updates.show_watermark_style = req.body.show_watermark_style;
     if (req.body.show_colorfilter !== undefined) updates.show_colorfilter = req.body.show_colorfilter;
 
     // Knex throws on an empty update; only write if something changed.
@@ -2043,11 +2028,7 @@ router.patch('/:id/slideshow', adminAuth, requirePermission('events.edit'), requ
       show_interval_ms: updates.show_interval_ms ?? event.show_interval_ms ?? 5000,
       show_transition: updates.show_transition ?? event.show_transition ?? 'crossfade',
       show_transition_ms: updates.show_transition_ms ?? event.show_transition_ms ?? 800,
-      show_watermark: updates.show_watermark ?? event.show_watermark ?? false,
-      show_watermark_source: updates.show_watermark_source ?? event.show_watermark_source ?? 'logo',
-      show_watermark_position: updates.show_watermark_position ?? event.show_watermark_position ?? 'bottom-right',
-      show_watermark_opacity: updates.show_watermark_opacity ?? event.show_watermark_opacity ?? 60,
-      show_watermark_style: updates.show_watermark_style ?? event.show_watermark_style ?? 'white',
+      show_watermark: updates.show_watermark ?? event.show_watermark ?? null,
       show_colorfilter: updates.show_colorfilter ?? event.show_colorfilter ?? 'none'
     });
   } catch (error) {

backend/src/routes/adminSettings.js

@@ -317,6 +317,10 @@ router.put('/slideshow', adminAuth, requirePermission('settings.edit'), async (r
       const v = ['white', 'original'].includes(req.body.slideshow_watermark_style) ? req.body.slideshow_watermark_style : 'white';
       push('slideshow_watermark_style', v);
     }
+    if (has('slideshow_watermark_size')) {
+      const n = Math.min(40, Math.max(3, Math.round(Number(req.body.slideshow_watermark_size) || 12)));
+      push('slideshow_watermark_size', n);
+    }
 
     for (const u of updates) {
       await upsertAppSetting(u.setting_key, u.setting_value, u.setting_type);

backend/src/routes/gallery.js

@@ -264,9 +264,10 @@ async function resolveSlideshow(slug, token) {
 // from the chosen source so the kiosk renders it without knowing about
 // branding/event internals; null url = nothing to overlay.
 async function slideshowSettings(event) {
-  // Watermark cascade: per-event `show_watermark` overrides the global default,
-  // NULL inherits it. When inheriting, the source/position/opacity also come
-  // from the global settings; when overriding, from the event's own columns.
+  // Watermark: the LOOK (logo/position/opacity/style/size) is configured ONCE
+  // globally (Settings → Slideshow); it is NOT duplicated per event. The only
+  // per-event control is whether the watermark shows: `show_watermark` NULL
+  // inherits the global enabled flag, true/false force it on/off.
   const wm = event.show_watermark;
   const inherit = (wm === null || wm === undefined);
   const enabled = inherit
@@ -274,18 +275,11 @@ async function slideshowSettings(event) {
     : (wm === true || wm === 1 || wm === '1');
   let watermark = null;
   if (enabled) {
-    const source = inherit
-      ? (await getAppSetting('slideshow_watermark_source', 'logo'))
-      : (event.show_watermark_source || 'logo');
-    const position = inherit
-      ? (await getAppSetting('slideshow_watermark_position', 'bottom-right'))
-      : (event.show_watermark_position || 'bottom-right');
-    const opacity = inherit
-      ? (await getAppSetting('slideshow_watermark_opacity', 60))
-      : (event.show_watermark_opacity ?? 60);
-    const style = inherit
-      ? (await getAppSetting('slideshow_watermark_style', 'white'))
-      : (event.show_watermark_style || 'white');
+    const source = await getAppSetting('slideshow_watermark_source', 'logo');
+    const position = await getAppSetting('slideshow_watermark_position', 'bottom-right');
+    const opacity = await getAppSetting('slideshow_watermark_opacity', 60);
+    const style = await getAppSetting('slideshow_watermark_style', 'white');
+    const size = await getAppSetting('slideshow_watermark_size', 12);
     // Resolve the chosen logo to a URL. Branding assets come from settings;
     // the event source uses the event's own hero logo.
     let url;
@@ -299,7 +293,7 @@ async function slideshowSettings(event) {
       url = await getAppSetting('branding_logo_url', null);
     }
     if (url) {
-      watermark = { url, position: position || 'bottom-right', opacity: opacity ?? 60, style: style || 'white' };
+      watermark = { url, position: position || 'bottom-right', opacity: opacity ?? 60, style: style || 'white', size: size ?? 12 };
     }
   }
   return {

frontend/src/components/admin/SlideshowGlobalDefaultsCard.tsx

@@ -26,6 +26,7 @@ const DEFAULTS: SlideshowGlobalDefaults = {
   slideshow_watermark_position: 'bottom-right',
   slideshow_watermark_opacity: 60,
   slideshow_watermark_style: 'white',
+  slideshow_watermark_size: 12,
 };
 
 const inputClass =
@@ -47,6 +48,7 @@ export const SlideshowGlobalDefaultsCard: React.FC = () => {
         slideshow_watermark_position: s.slideshow_watermark_position ?? DEFAULTS.slideshow_watermark_position,
         slideshow_watermark_opacity: s.slideshow_watermark_opacity ?? DEFAULTS.slideshow_watermark_opacity,
         slideshow_watermark_style: s.slideshow_watermark_style ?? DEFAULTS.slideshow_watermark_style,
+        slideshow_watermark_size: s.slideshow_watermark_size ?? DEFAULTS.slideshow_watermark_size,
       });
     }).catch(() => { /* keep defaults */ });
     return () => { cancelled = true; };
@@ -142,6 +144,18 @@ export const SlideshowGlobalDefaultsCard: React.FC = () => {
                 ))}
               </select>
             </div>
+            <div>
+              <label className={labelClass}>{t('slideshow.watermarkSizeLabel', 'Size (% of screen)')}</label>
+              <input
+                type="number"
+                min={3}
+                max={40}
+                step={1}
+                value={val.slideshow_watermark_size}
+                onChange={(e) => setVal({ ...val, slideshow_watermark_size: Math.min(40, Math.max(3, parseInt(e.target.value, 10) || 12)) })}
+                className={inputClass}
+              />
+            </div>
             </div>
           </div>
         )}

frontend/src/components/admin/SlideshowSettingsCard.tsx

@@ -28,18 +28,12 @@ export interface SlideshowSettingsCardProps {
   eventId: number;
   slug: string;
   isArchived?: boolean;
-  /** The event's own hero logo, previewed for the 'event' watermark source. */
-  eventLogoUrl?: string | null;
   initial: {
     show_share_token?: string | null;
     show_interval_ms?: number;
     show_transition?: string;
     show_transition_ms?: number;
     show_watermark?: boolean | null;
-    show_watermark_source?: string;
-    show_watermark_position?: string;
-    show_watermark_opacity?: number;
-    show_watermark_style?: string;
     show_colorfilter?: string;
   };
   onChanged?: () => void;
@@ -57,16 +51,12 @@ function styleFromInitial(initial: SlideshowSettingsCardProps['initial']): Slide
     transition: (initial.show_transition as SlideshowStyle['transition']) ?? DEFAULT_SLIDESHOW_STYLE.transition,
     transition_ms: initial.show_transition_ms ?? DEFAULT_SLIDESHOW_STYLE.transition_ms,
     watermark: watermarkMode(initial.show_watermark),
-    watermark_source: (initial.show_watermark_source as SlideshowStyle['watermark_source']) ?? DEFAULT_SLIDESHOW_STYLE.watermark_source,
-    watermark_position: (initial.show_watermark_position as SlideshowStyle['watermark_position']) ?? DEFAULT_SLIDESHOW_STYLE.watermark_position,
-    watermark_opacity: initial.show_watermark_opacity ?? DEFAULT_SLIDESHOW_STYLE.watermark_opacity,
-    watermark_style: (initial.show_watermark_style as SlideshowStyle['watermark_style']) ?? DEFAULT_SLIDESHOW_STYLE.watermark_style,
     colorfilter: (initial.show_colorfilter as SlideshowStyle['colorfilter']) ?? DEFAULT_SLIDESHOW_STYLE.colorfilter,
   };
 }
 
 export const SlideshowSettingsCard: React.FC<SlideshowSettingsCardProps> = ({
-  eventId, slug, isArchived, eventLogoUrl, initial, onChanged,
+  eventId, slug, isArchived, initial, onChanged,
 }) => {
   const { t } = useTranslation();
 
@@ -135,12 +125,9 @@ export const SlideshowSettingsCard: React.FC<SlideshowSettingsCardProps> = ({
         show_interval_ms: style.interval_ms,
         show_transition: style.transition,
         show_transition_ms: style.transition_ms,
-        // Tri-state → null (inherit global) / true / false.
+        // Tri-state → null (inherit global) / true / false. The watermark LOOK
+        // is global-only (Settings → Slideshow); we only send the mode here.
         show_watermark: style.watermark === 'inherit' ? null : style.watermark === 'on',
-        show_watermark_source: style.watermark_source,
-        show_watermark_position: style.watermark_position,
-        show_watermark_opacity: style.watermark_opacity,
-        show_watermark_style: style.watermark_style,
         show_colorfilter: style.colorfilter,
       });
       toast.success(t('slideshow.settingsSaved', 'Slideshow settings saved'));
@@ -221,7 +208,7 @@ export const SlideshowSettingsCard: React.FC<SlideshowSettingsCardProps> = ({
 
             {/* Live style settings */}
             <div className="pt-2 border-t border-neutral-200 dark:border-neutral-700">
-              <SlideshowStyleFields value={style} onChange={setStyle} eventLogoUrl={eventLogoUrl} />
+              <SlideshowStyleFields value={style} onChange={setStyle} />
             </div>
             <p className="text-xs text-neutral-500 dark:text-neutral-400">
               {t('slideshow.liveHint', 'Changes apply to a running slideshow within a few seconds — no need to regenerate the link.')}

frontend/src/components/admin/SlideshowStyleFields.tsx

@@ -14,18 +14,13 @@ import { useTranslation } from 'react-i18next';
 import {
   SLIDESHOW_TRANSITIONS,
   SLIDESHOW_COLORFILTERS,
-  SLIDESHOW_WATERMARK_POSITIONS,
   SLIDESHOW_WATERMARK_MODES,
-  SLIDESHOW_WATERMARK_STYLES,
   type SlideshowStyle,
 } from '../../services/slideshow.service';
-import { WatermarkSourcePicker } from './WatermarkSourcePicker';
 
 export interface SlideshowStyleFieldsProps {
   value: SlideshowStyle;
   onChange: (next: SlideshowStyle) => void;
-  /** Per-event hero logo, previewed for the 'event' watermark source. */
-  eventLogoUrl?: string | null;
 }
 
 const inputClass =
@@ -34,7 +29,7 @@ const labelClass = 'block text-sm font-medium text-neutral-700 dark:text-neutral
 
 const titleCase = (s: string) => s.charAt(0).toUpperCase() + s.slice(1);
 
-export const SlideshowStyleFields: React.FC<SlideshowStyleFieldsProps> = ({ value, onChange, eventLogoUrl }) => {
+export const SlideshowStyleFields: React.FC<SlideshowStyleFieldsProps> = ({ value, onChange }) => {
   const { t } = useTranslation();
   const set = (patch: Partial<SlideshowStyle>) => onChange({ ...value, ...patch });
 
@@ -97,7 +92,8 @@ export const SlideshowStyleFields: React.FC<SlideshowStyleFieldsProps> = ({ valu
         </select>
       </div>
 
-      {/* Watermark */}
+      {/* Watermark — MODE only. The look (logo/position/opacity/style/size)
+          lives in Settings → Slideshow, so it isn't duplicated here. */}
       <div className="pt-2 border-t border-neutral-200 dark:border-neutral-700">
         <label className={labelClass}>{t('slideshow.watermarkToggle', 'Logo watermark')}</label>
         <select
@@ -112,63 +108,8 @@ export const SlideshowStyleFields: React.FC<SlideshowStyleFieldsProps> = ({ valu
           ))}
         </select>
         <p className="text-xs text-neutral-500 dark:text-neutral-400 mt-1">
-          {t('slideshow.watermarkDescription', 'Overlay a white, semi-transparent logo in a corner (like a TV station ident).')}
+          {t('slideshow.watermarkModeHint', 'The logo, position, opacity, style and size are configured under Settings → Slideshow.')}
         </p>
-
-        {value.watermark === 'on' && (
-          <div className="mt-3 space-y-3">
-            <div>
-              <label className={labelClass}>{t('slideshow.watermarkSourceLabel', 'Logo')}</label>
-              <WatermarkSourcePicker
-                value={value.watermark_source}
-                onChange={(s) => set({ watermark_source: s })}
-                eventLogoUrl={eventLogoUrl}
-              />
-            </div>
-            <div className="grid grid-cols-1 sm:grid-cols-3 gap-3">
-            <div>
-              <label className={labelClass}>{t('slideshow.watermarkPositionLabel', 'Position')}</label>
-              <select
-                value={value.watermark_position}
-                onChange={(e) => set({ watermark_position: e.target.value as SlideshowStyle['watermark_position'] })}
-                className={inputClass}
-              >
-                {SLIDESHOW_WATERMARK_POSITIONS.map((pos) => (
-                  <option key={pos} value={pos}>
-                    {t(`slideshow.watermarkPosition.${pos}`, pos)}
-                  </option>
-                ))}
-              </select>
-            </div>
-            <div>
-              <label className={labelClass}>{t('slideshow.watermarkOpacityLabel', 'Opacity (%)')}</label>
-              <input
-                type="number"
-                min={0}
-                max={100}
-                step={5}
-                value={value.watermark_opacity}
-                onChange={(e) => set({ watermark_opacity: Math.min(100, Math.max(0, parseInt(e.target.value, 10) || 0)) })}
-                className={inputClass}
-              />
-            </div>
-            <div>
-              <label className={labelClass}>{t('slideshow.watermarkStyleLabel', 'Logo style')}</label>
-              <select
-                value={value.watermark_style}
-                onChange={(e) => set({ watermark_style: e.target.value as SlideshowStyle['watermark_style'] })}
-                className={inputClass}
-              >
-                {SLIDESHOW_WATERMARK_STYLES.map((st) => (
-                  <option key={st} value={st}>
-                    {t(`slideshow.watermarkStyle.${st}`, st === 'original' ? 'Original colors' : 'White')}
-                  </option>
-                ))}
-              </select>
-            </div>
-            </div>
-          </div>
-        )}
       </div>
     </div>
   );

frontend/src/i18n/locales/de.json

@@ -3195,6 +3195,8 @@
     },
     "watermarkOpacityLabel": "Deckkraft (%)",
     "watermarkStyleLabel": "Logo-Darstellung",
+    "watermarkSizeLabel": "Größe (% des Bildschirms)",
+    "watermarkModeHint": "Logo, Position, Deckkraft, Darstellung und Größe werden unter Einstellungen → Diashow konfiguriert.",
     "watermarkStyle": {
       "white": "Weiß (einfärben)",
       "original": "Originalfarben"

frontend/src/i18n/locales/en.json

@@ -3219,6 +3219,8 @@
     },
     "watermarkOpacityLabel": "Opacity (%)",
     "watermarkStyleLabel": "Logo style",
+    "watermarkSizeLabel": "Size (% of screen)",
+    "watermarkModeHint": "The logo, position, opacity, style and size are configured under Settings → Slideshow.",
     "watermarkStyle": {
       "white": "White (recolor)",
       "original": "Original colors"

frontend/src/pages/admin/EventDetailsPage.tsx

@@ -2166,17 +2166,12 @@ export const EventDetailsPage: React.FC = () => {
             eventId={event.id}
             slug={event.slug}
             isArchived={event.is_archived}
-            eventLogoUrl={event.hero_logo_url}
             initial={{
               show_share_token: event.show_share_token,
               show_interval_ms: event.show_interval_ms,
               show_transition: event.show_transition,
               show_transition_ms: event.show_transition_ms,
               show_watermark: event.show_watermark,
-              show_watermark_source: event.show_watermark_source,
-              show_watermark_position: event.show_watermark_position,
-              show_watermark_opacity: event.show_watermark_opacity,
-              show_watermark_style: event.show_watermark_style,
               show_colorfilter: event.show_colorfilter,
             }}
             onChanged={() => refetchEvent()}

frontend/src/pages/gallery/SlideshowPage.tsx

@@ -423,8 +423,10 @@ export function SlideshowPage() {
                 ...watermarkCorner(settings.watermark!.position),
                 width: 'auto',
                 height: 'auto',
-                maxWidth: '16vw',
-                maxHeight: '14vh',
+                // Size = % of the viewport's shorter side (vmin), so the logo
+                // scales the same on any screen. Configured globally.
+                maxWidth: `${settings.watermark!.size ?? 12}vmin`,
+                maxHeight: `${settings.watermark!.size ?? 12}vmin`,
                 opacity: Math.min(1, Math.max(0, (settings.watermark!.opacity ?? 60) / 100)),
                 // 'white' recolors the logo white (dark/transparent marks); 'original'
                 // leaves a boxed/colored logo as-is so it doesn't become a white blob.

frontend/src/services/events.service.ts

@@ -157,10 +157,6 @@ export const eventsService = {
       show_transition?: string;
       show_transition_ms?: number;
       show_watermark?: boolean | null;
-      show_watermark_source?: string;
-      show_watermark_position?: string;
-      show_watermark_opacity?: number;
-      show_watermark_style?: string;
       show_colorfilter?: string;
     }
   ): Promise<Record<string, unknown>> {

frontend/src/services/slideshow.service.ts

@@ -23,15 +23,15 @@ export const SLIDESHOW_WATERMARK_POSITIONS: SlideshowWatermarkPosition[] = ['top
 // Canonical editable style shape, shared by the per-event card and the
 // per-event-type preset editor. The per-event-type `slideshow_preset` JSON
 // uses exactly these keys; the per-event API maps them to `show_*` columns.
+//
+// NOTE: the watermark LOOK (logo/position/opacity/style/size) lives ONLY in the
+// global Settings → Slideshow tab — it is not duplicated here. Per-event/type
+// carry just the `watermark` MODE (inherit/on/off), i.e. the override structure.
 export interface SlideshowStyle {
   interval_ms: number;
   transition: SlideshowTransition;
   transition_ms: number;
   watermark: SlideshowWatermarkMode;
-  watermark_source: SlideshowWatermarkSource;
-  watermark_position: SlideshowWatermarkPosition;
-  watermark_opacity: number;
-  watermark_style: SlideshowWatermarkStyle;
   colorfilter: SlideshowColorFilter;
 }
 
@@ -40,21 +40,20 @@ export const DEFAULT_SLIDESHOW_STYLE: SlideshowStyle = {
   transition: 'crossfade',
   transition_ms: 800,
   watermark: 'inherit',
-  watermark_source: 'logo',
-  watermark_position: 'bottom-right',
-  watermark_opacity: 60,
-  watermark_style: 'white',
   colorfilter: 'none',
 };
 
-// Global slideshow defaults (admin Settings → Slideshow). The per-event
-// watermark mode 'inherit' falls back to these.
+// Global slideshow defaults (admin Settings → Slideshow). The single source of
+// truth for the watermark look; the per-event watermark mode 'inherit'/'on'
+// renders with exactly these.
 export interface SlideshowGlobalDefaults {
   slideshow_watermark_enabled: boolean;
   slideshow_watermark_source: SlideshowWatermarkSource;
   slideshow_watermark_position: SlideshowWatermarkPosition;
   slideshow_watermark_opacity: number;
   slideshow_watermark_style: SlideshowWatermarkStyle;
+  // Logo size as a % of the viewport's shorter side.
+  slideshow_watermark_size: number;
 }
 
 // Resolved watermark the kiosk renders (logo URL already resolved server-side).
@@ -63,6 +62,7 @@ export interface SlideshowWatermark {
   position: SlideshowWatermarkPosition;
   opacity: number;
   style: SlideshowWatermarkStyle;
+  size: number;
 }
 
 export interface SlideshowSettings {

frontend/src/types/index.ts

@@ -74,11 +74,9 @@ export interface Event {
   show_interval_ms?: number;
   show_transition?: 'crossfade' | 'cut' | 'slide' | 'kenburns' | 'dipwhite' | 'dipblack';
   show_transition_ms?: number;
-  show_watermark?: boolean;
-  show_watermark_source?: 'branding' | 'event';
-  show_watermark_position?: 'top-left' | 'top-right' | 'bottom-left' | 'bottom-right';
-  show_watermark_opacity?: number;
-  show_watermark_style?: 'white' | 'original';
+  // Watermark MODE only (null=inherit global / true / false). The look lives
+  // globally in Settings → Slideshow, not per event.
+  show_watermark?: boolean | null;
   show_colorfilter?: 'none' | 'bw' | 'sepia' | 'warm' | 'cool' | 'vignette';
   // Default photo sort order
   default_photo_sort?: string;