feat: Seiten-Thumbnails mit echter Vorschau + Hell/Dunkel-Toggle

- Jeder Thumb hat jetzt einen mini canvas, der das Bild oder die erste
  PDF-Seite gerendert anzeigt (max 200px)
- Papier-Look: A4 aspect-ratio (1:1.414), weißer Hintergrund per Default
- 🌓-Button im Pages-Header schaltet zwischen paper-light und paper-dark
- Toolbar-Inputs (select/number/checkbox): heller Text auf dunklem
  Hintergrund für Dark-Theme

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
[deploy]

bericht_card.php

@@ -313,11 +313,17 @@ if (!$bericht) {
 
     // RECHTS: Seiten-Thumbnails
     print '<aside class="bericht-pages">';
+    print '<div class="bericht-pages-header">';
     print '<h4>'.$langs->trans("BerichtPages").' (<span id="page-count">'.count($pages).'</span>)</h4>';
-    print '<div id="bericht-page-list" class="page-list">';
+    print '<button type="button" id="btn-toggle-thumb-bg" title="Hell/Dunkel">🌓</button>';
+    print '</div>';
+    print '<div id="bericht-page-list" class="page-list paper-light">';
     foreach ($pages as $idx => $p) {
         print '<div class="page-thumb" data-pageid="'.$p->id.'" data-order="'.$p->page_order.'">';
-        print '<div class="page-thumb-inner"><span class="page-num">'.($idx + 1).'</span></div>';
+        print '<div class="page-thumb-paper">';
+        print '<canvas class="thumb-canvas"></canvas>';
+        print '</div>';
+        print '<div class="page-thumb-label"><span class="page-num">'.($idx + 1).'</span></div>';
         print '<div class="page-thumb-actions">';
         print '<button type="button" class="thumb-del" title="'.$langs->trans("BerichtDeletePage").'">🗑️</button>';
         print '</div>';

css/bericht.css

@@ -102,16 +102,19 @@
 .bericht-toolbar select,
 .bericht-toolbar input[type="number"],
 .bericht-toolbar input[type="text"] {
-    background: var(--inputbackgroundcolor, #fff);
-    color: var(--inputtextcolor, #000);
-    border: 1px solid var(--colorboxbordertitle1, #ccc);
+    background: var(--colorbackbody, #2a2a30);
+    color: var(--colortext, #ddd);
+    border: 1px solid var(--colorboxbordertitle1, #555);
     border-radius: 3px;
     padding: 2px 4px;
     font-size: 12px;
 }
-.bericht-toolbar #zoom-label {
-    color: var(--colortext, inherit);
+.bericht-toolbar select option {
+    background: var(--colorbackbody, #2a2a30);
+    color: var(--colortext, #ddd);
 }
+.bericht-toolbar #zoom-label { color: var(--colortext, inherit); }
+.bericht-toolbar input[type="checkbox"] { accent-color: var(--colorbackhmenu1, #337ab7); }
 
 .bericht-canvas-wrap {
     position: relative;
@@ -139,34 +142,70 @@
     border: 1px solid var(--colorboxbordertitle1, #ccc);
 }
 
-.page-list { display: flex; flex-direction: column; gap: 6px; }
-.page-thumb {
-    background: var(--colorbacktitle1, #fff);
+.bericht-pages-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
+.bericht-pages-header h4 { margin: 0; }
+#btn-toggle-thumb-bg {
+    background: transparent;
+    border: 1px solid var(--colorboxbordertitle1, #555);
     color: var(--colortext, inherit);
-    border: 2px solid var(--colorboxbordertitle1, #ddd);
-    border-radius: 4px;
-    padding: 6px; cursor: pointer; position: relative;
-    transition: border-color 0.15s;
+    border-radius: 3px;
+    cursor: pointer;
+    padding: 2px 6px;
+}
+
+.page-list { display: flex; flex-direction: column; gap: 8px; }
+
+.page-thumb {
+    border: 2px solid var(--colorboxbordertitle1, #444);
+    border-radius: 3px;
+    cursor: pointer;
+    position: relative;
+    transition: border-color 0.15s, box-shadow 0.15s;
+    overflow: hidden;
 }
 .page-thumb:hover { border-color: var(--colortextlink, #888); }
 .page-thumb.active {
     border-color: var(--colortextlink, #337ab7);
-    box-shadow: 0 0 0 2px var(--colorbackhmenu1, rgba(51,122,183,0.3));
+    box-shadow: 0 0 0 2px rgba(51,122,183,0.4);
 }
-.page-thumb-inner {
-    height: 100px;
-    background: var(--colorbackvmenu1, #f0f0f0);
+
+/* "Papier"-Look — heller Default, mit Papier-Schatten */
+.page-list.paper-light .page-thumb-paper { background: #ffffff; }
+.page-list.paper-dark  .page-thumb-paper { background: #1e1e22; }
+
+.page-thumb-paper {
+    width: 100%;
+    aspect-ratio: 1 / 1.414; /* DIN A4 Verhältnis (Hochformat) */
     display: flex; align-items: center; justify-content: center;
-    font-size: 24px; opacity: 0.6;
+    box-shadow: inset 0 0 0 1px rgba(0,0,0,0.1);
+    overflow: hidden;
 }
+.page-thumb-paper canvas.thumb-canvas {
+    max-width: 100%;
+    max-height: 100%;
+    display: block;
+}
+
+.page-thumb-label {
+    text-align: center;
+    font-size: 11px;
+    padding: 3px 0;
+    background: var(--colorbacktitle1, #2a2a30);
+    color: var(--colortext, #ddd);
+    border-top: 1px solid var(--colorboxbordertitle1, #444);
+}
+
 .page-thumb-actions { position: absolute; top: 4px; right: 4px; }
 .thumb-del {
-    background: var(--colorbacktitle1, rgba(255,255,255,0.9));
-    color: var(--colortext, inherit);
-    border: 1px solid var(--colorboxbordertitle1, #ccc);
+    background: rgba(0,0,0,0.6);
+    color: #fff;
+    border: 1px solid rgba(255,255,255,0.3);
     border-radius: 3px;
     cursor: pointer;
+    padding: 2px 6px;
+    font-size: 12px;
 }
+.thumb-del:hover { background: rgba(217,83,79,0.9); }
 
 .bericht-actions {
     margin-top: 16px;

js/editor.js

@@ -55,6 +55,9 @@
         const firstThumb = document.querySelector('#bericht-page-list .page-thumb');
         if (firstThumb) loadPage(firstThumb);
 
+        // Alle Thumbnails parallel rendern
+        renderAllThumbs();
+
         bindThumbs();
         bindToolbar();
         bindAttachments();
@@ -590,6 +593,72 @@
                 location.reload();
             });
         });
+
+        // Hell/Dunkel-Toggle
+        const tg = document.getElementById('btn-toggle-thumb-bg');
+        if (tg) tg.addEventListener('click', () => {
+            const list = document.getElementById('bericht-page-list');
+            list.classList.toggle('paper-light');
+            list.classList.toggle('paper-dark');
+        });
+    }
+
+    /**
+     * Rendert alle Thumbnails in der rechten Seitenleiste.
+     * Holt jedes Bild über page_image.php und zeichnet es klein in das Thumb-Canvas.
+     * PDFs werden mit PDF.js gerendert.
+     */
+    async function renderAllThumbs() {
+        const thumbs = document.querySelectorAll('.page-thumb');
+        for (const t of thumbs) {
+            const pageid = t.dataset.pageid;
+            const canvas = t.querySelector('.thumb-canvas');
+            if (!canvas || !pageid) continue;
+            try {
+                const r = await fetch(cfg.urls.page_image + '?pageid=' + pageid);
+                const ct = r.headers.get('Content-Type') || '';
+                const buf = await r.arrayBuffer();
+                if (ct.includes('pdf')) {
+                    await renderThumbPdf(canvas, buf);
+                } else if (ct.includes('image')) {
+                    await renderThumbImage(canvas, buf, ct);
+                }
+            } catch (e) { /* skip */ }
+        }
+    }
+
+    async function renderThumbImage(canvas, buf, mime) {
+        return new Promise(res => {
+            const blob = new Blob([buf], { type: mime });
+            const url = URL.createObjectURL(blob);
+            const img = new Image();
+            img.onload = () => {
+                const maxSide = 200;
+                const ratio = Math.min(maxSide / img.width, maxSide / img.height);
+                canvas.width  = Math.round(img.width  * ratio);
+                canvas.height = Math.round(img.height * ratio);
+                const ctx = canvas.getContext('2d');
+                ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
+                URL.revokeObjectURL(url);
+                res();
+            };
+            img.onerror = () => { URL.revokeObjectURL(url); res(); };
+            img.src = url;
+        });
+    }
+
+    async function renderThumbPdf(canvas, buf) {
+        if (!window.pdfjsLib) return;
+        try {
+            const doc = await pdfjsLib.getDocument({ data: buf.slice(0) }).promise;
+            const page = await doc.getPage(1);
+            const base = page.getViewport({ scale: 1 });
+            const scale = 200 / base.width;
+            const vp = page.getViewport({ scale: scale });
+            canvas.width  = vp.width;
+            canvas.height = vp.height;
+            await page.render({ canvasContext: canvas.getContext('2d'), viewport: vp }).promise;
+        } catch (e) { /* skip */ }
     }
 
     function bindSortable() {