Keep empty region previews blank

src/web/public/js/regions/type/html.js

@@ -44,7 +44,7 @@
   function renderPreview(region, value) {
     var html = normalizePreviewValue(value !== undefined ? value : region).trim();
     if (!html) {
-      return '<div class="slide-preview-placeholder">HTML</div>';
+      return '';
     }
     if (/^<!doctype\b/i.test(html) || /^<html\b/i.test(html)) {
       return '<iframe class="slide-preview-html-frame" sandbox="" allowtransparency="true" scrolling="no" srcdoc="' + escapeHtml(buildHtmlDocument(html)) + '" title="HTML preview" loading="eager" style="width:100%;height:100%;border:0;display:block;background:transparent;overflow:hidden;"></iframe>';

src/web/public/js/regions/type/image.js

@@ -21,7 +21,7 @@
     var content = value && typeof value === 'object' && value.value !== undefined ? value : null;
     var src = String(content ? content.value : value || '').trim();
     if (!src) {
-      return '<div class="slide-preview-placeholder">Image</div>';
+      return '';
     }
     return '<img class="slide-preview-image" src="' + escapeHtml(src) + '" alt="" style="width:100%;height:100%;object-fit:contain;display:block;" />';
   }

src/web/public/js/regions/type/qr-code.js

@@ -880,7 +880,7 @@
       src = svgSrc || buildStyledQrSvgMarkup(value);
     }
     if (!src) {
-      return '<div class="slide-preview-placeholder">QR Code</div>';
+      return '';
     }
     if (/^data:image\//i.test(src)) {
       return '<img class="slide-preview-qr-code" src="' + escapeHtml(src) + '" alt="QR code preview" style="' + imageStyle + '" />';

src/web/public/js/regions/type/rss.js

@@ -158,7 +158,7 @@
 
   function getPreviewFallback(item) {
     if (!item || typeof item !== 'object') {
-      return '<div class="slide-preview-placeholder">RSS item</div>';
+      return '';
     }
 
     var title = String(item.title || '').trim();
@@ -171,7 +171,7 @@
       summary.push('<p>' + sanitizePreviewHtml(description) + '</p>');
     }
     if (!summary.length) {
-      return '<div class="slide-preview-placeholder">RSS item</div>';
+      return '';
     }
     return summary.join('');
   }

src/web/public/js/regions/type/rtmp.js

@@ -11,7 +11,10 @@
   function renderPreview(value, disableAudio) {
     var content = value && typeof value === 'object' && value.value !== undefined ? value : null;
     var src = String(content ? content.value : value || '').trim();
-    var label = src ? 'RTMP' : 'RTMP stream';
+    if (!src) {
+      return '';
+    }
+    var label = 'RTMP';
     if (disableAudio) {
       label += ' (muted)';
     }

src/web/public/js/regions/type/text.js

@@ -29,7 +29,7 @@
     var rawValue = value && typeof value === 'object' && value.value !== undefined ? value.value : value;
     var raw = String(rawValue || '');
     if (!raw) {
-      return '<div class="slide-preview-placeholder">Empty text</div>';
+      return '';
     }
 
     var style = styleOrContext && styleOrContext.style ? styleOrContext.style : styleOrContext || {};

src/web/public/js/regions/type/video.js

@@ -26,7 +26,7 @@
     var content = value && typeof value === 'object' && value.value !== undefined ? value : null;
     var src = String(content ? content.value : value || '').trim();
     if (!src) {
-      return '<div class="slide-preview-placeholder">Video</div>';
+      return '';
     }
     return '<video class="slide-preview-video" src="' + escapeHtml(src) + '" autoplay loop muted playsinline preload="metadata" style="width:100%;height:100%;object-fit:contain;display:block;"></video>';
   }

src/web/public/js/regions/type/weather.js

@@ -148,10 +148,11 @@
 
   function renderPreview(region, content, context) {
     var locations = context && context.weatherLocations ? context.weatherLocations : [];
+    var value = String(content && content.value || '');
+    if (!value.trim()) return '';
     var location = getLocationById(content && content.weather_location_id, locations);
     var snapshot = getSnapshot(location);
-    var value = String(content && content.value || '');
-    if (!location || !snapshot) return '<div class="template-region weather"><div class="slide-preview-placeholder">Select a weather location with cached data</div></div>';
+    if (!location || !snapshot) return '';
     var weatherData = withWeatherUnits(snapshot, location);
     if (value) {
       var fontSize = Math.max(8, Number(content && content.font_size || region && (region.font_size || region.fontSize) || 32) || 32);

src/web/public/js/regions/type/webpage.js

@@ -37,7 +37,7 @@
   function renderPreview(region, value) {
     var src = normalizePreviewValue(value !== undefined ? value : region).trim();
     if (!src) {
-      return '<div class="slide-preview-placeholder">Webpage</div>';
+      return '';
     }
     return '<iframe class="slide-preview-webpage-frame" src="' + escapeHtml(src) + '" title="Webpage preview" loading="eager" referrerpolicy="no-referrer" scrolling="no" style="width:100%;height:100%;border:0;display:block;background:#fff;overflow:hidden;"></iframe>';
   }

src/web/public/js/slides/slide-form-preview.js

@@ -187,7 +187,7 @@ export function createSlideFormPreviewHelpers(options) {
     }
     var raw = String(rawValue || '');
     if (!raw) {
-      return '<div class="slide-preview-placeholder">Empty text</div>';
+      return '';
     }
     return sanitizePreviewHtml(raw);
   }

src/web/public/js/slides/slide-form-regions.js

@@ -323,7 +323,7 @@ export function createSlideFormRegionHelpers(options) {
     }
 
     if (!item || typeof item !== 'object') {
-      return '<div class="slide-preview-placeholder">RSS item</div>';
+      return '';
     }
 
     var title = String(item.title || '').trim();
@@ -336,7 +336,7 @@ export function createSlideFormRegionHelpers(options) {
       summary.push('<p>' + sanitizePreviewHtml(description) + '</p>');
     }
     if (!summary.length) {
-      return '<div class="slide-preview-placeholder">RSS item</div>';
+      return '';
     }
     return summary.join('');
   }