Add persistent gallery zoom and proportional card layout

website/public/data/site.json

@@ -2046,6 +2046,9 @@
         "galleryTitle": "Galerie d'images",
         "galleryImageAriaLabel": "Afficher en grand",
         "returnGalleryTitle": "Revenir à la galerie",
+        "galleryZoomLabel": "Taille des aperçus",
+        "galleryZoomOutTitle": "Réduire les aperçus",
+        "galleryZoomInTitle": "Agrandir les aperçus",
         "previousImageTitle": "Image précédente",
         "nextImageTitle": "Image suivante",
         "positionLabel": "Image {current} sur {total}",

website/src/components/ImageGallery.jsx

@@ -1,7 +1,7 @@
 // Rôle : affiche la collection d'un outil Images dans la galerie de la visionneuse.
 import { useEffect, useRef } from "react";
 
-export function ImageGallery({ images, activeIndex, focusIndex = -1, onSelect, textContent = {} }) {
+export function ImageGallery({ images, activeIndex, focusIndex = -1, thumbnailWidth = 260, onSelect, textContent = {} }) {
   const galleryRef = useRef(null);
 
   useEffect(() => {
@@ -13,7 +13,7 @@ export function ImageGallery({ images, activeIndex, focusIndex = -1, onSelect, t
   }, [focusIndex]);
 
   return (
-    <div ref={galleryRef} className="image-viewer-gallery themed-scrollbar">
+    <div ref={galleryRef} className="image-viewer-gallery themed-scrollbar" style={{ "--image-gallery-thumbnail-width": `${thumbnailWidth}px` }}>
       {images.map((image, index) => {
         const position = `${index + 1} / ${images.length}`;
         const label = image.label || `${textContent.imageAlt || "Image"} ${index + 1}`;

website/src/components/ImageViewer.jsx

@@ -8,6 +8,28 @@ import { Icon } from "./Icon.jsx";
 import { ImageGallery } from "./ImageGallery.jsx";
 import { Tooltip } from "./Tooltip.jsx";
 
+const IMAGE_GALLERY_SIZE_STORAGE_KEY = "sokkog:image-gallery-thumbnail-width";
+const IMAGE_GALLERY_SIZE_MIN = 180;
+const IMAGE_GALLERY_SIZE_MAX = 420;
+const IMAGE_GALLERY_SIZE_STEP = 40;
+const IMAGE_GALLERY_SIZE_DEFAULT = 260;
+
+function normalizeGalleryThumbnailWidth(value) {
+  const parsed = Number(value);
+  if (!Number.isFinite(parsed)) return IMAGE_GALLERY_SIZE_DEFAULT;
+  const clamped = Math.min(IMAGE_GALLERY_SIZE_MAX, Math.max(IMAGE_GALLERY_SIZE_MIN, parsed));
+  return IMAGE_GALLERY_SIZE_MIN + Math.round((clamped - IMAGE_GALLERY_SIZE_MIN) / IMAGE_GALLERY_SIZE_STEP) * IMAGE_GALLERY_SIZE_STEP;
+}
+
+function readGalleryThumbnailWidth() {
+  try {
+    const stored = localStorage.getItem(IMAGE_GALLERY_SIZE_STORAGE_KEY);
+    return stored == null || stored === "" ? IMAGE_GALLERY_SIZE_DEFAULT : normalizeGalleryThumbnailWidth(stored);
+  } catch {
+    return IMAGE_GALLERY_SIZE_DEFAULT;
+  }
+}
+
 function clampPercent(value) {
   const parsed = Number(value);
   if (!Number.isFinite(parsed)) return 0;
@@ -48,6 +70,7 @@ export function ImageViewer({ image, onClose, createMarkerId = () => globalThis.
   const [activeIndex, setActiveIndex] = useState(initialIndex);
   const [view, setView] = useState(initialView);
   const [galleryFocusIndex, setGalleryFocusIndex] = useState(-1);
+  const [galleryThumbnailWidth, setGalleryThumbnailWidth] = useState(readGalleryThumbnailWidth);
   const [previousRequest, setPreviousRequest] = useState(image);
   if (previousRequest !== image) {
     setPreviousRequest(image);
@@ -172,6 +195,14 @@ export function ImageViewer({ image, onClose, createMarkerId = () => globalThis.
     setView("detail");
   }
 
+  function resizeGalleryThumbnail(direction) {
+    const next = normalizeGalleryThumbnailWidth(galleryThumbnailWidth + direction * IMAGE_GALLERY_SIZE_STEP);
+    setGalleryThumbnailWidth(next);
+    try {
+      localStorage.setItem(IMAGE_GALLERY_SIZE_STORAGE_KEY, String(next));
+    } catch { /* La préférence reste active pour la modale courante si le stockage est indisponible. */ }
+  }
+
   const positionLabel = formatPositionLabel(textContent.positionLabel, activeIndex + 1, collection.length);
 
   function updateViewerMarker(markerId, updater) {
@@ -194,6 +225,12 @@ export function ImageViewer({ image, onClose, createMarkerId = () => globalThis.
             {isCollection && view === "detail" && <span className="image-viewer-position" aria-label={positionLabel} title={positionLabel} aria-live="polite">{activeIndex + 1} / {collection.length}</span>}
           </div>
           <div className="image-viewer-actions">
+            {view === "gallery" && (
+              <div className="image-viewer-gallery-zoom" role="group" aria-label={textContent.galleryZoomLabel || "Taille des aperçus"}>
+                <button className="image-viewer-gallery-zoom-button nds-icon-button" data-size="sm" type="button" disabled={galleryThumbnailWidth <= IMAGE_GALLERY_SIZE_MIN} onClick={() => resizeGalleryThumbnail(-1)} aria-label={textContent.galleryZoomOutTitle || "Réduire les aperçus"} title={textContent.galleryZoomOutTitle || "Réduire les aperçus"}><span aria-hidden="true">−</span></button>
+                <button className="image-viewer-gallery-zoom-button nds-icon-button" data-size="sm" type="button" disabled={galleryThumbnailWidth >= IMAGE_GALLERY_SIZE_MAX} onClick={() => resizeGalleryThumbnail(1)} aria-label={textContent.galleryZoomInTitle || "Agrandir les aperçus"} title={textContent.galleryZoomInTitle || "Agrandir les aperçus"}><span aria-hidden="true">+</span></button>
+              </div>
+            )}
             {isCollection && view === "detail" && (
               <button className="image-viewer-button nds-icon-button" data-size="sm" onClick={openGallery} aria-label={textContent.returnGalleryTitle || "Revenir à la galerie"} title={textContent.returnGalleryTitle || "Revenir à la galerie"}><Icon name="picture" /></button>
             )}
@@ -204,7 +241,7 @@ export function ImageViewer({ image, onClose, createMarkerId = () => globalThis.
           </div>
         </header>
         {view === "gallery" ? (
-          <ImageGallery images={collection} activeIndex={activeIndex} focusIndex={galleryFocusIndex} onSelect={openGalleryImage} textContent={textContent} />
+          <ImageGallery images={collection} activeIndex={activeIndex} focusIndex={galleryFocusIndex} thumbnailWidth={galleryThumbnailWidth} onSelect={openGalleryImage} textContent={textContent} />
         ) : <div className={`image-viewer-body ${canAnnotate ? "has-annotation-side" : ""} ${isCollection && collection.length > 1 ? "has-navigation" : ""}`}>
           {isCollection && collection.length > 1 && (
             <button className="image-viewer-nav image-viewer-nav-previous nds-icon-button" data-size="md" type="button" disabled={activeIndex === 0} onClick={() => setActiveIndex((index) => index - 1)} aria-label={textContent.previousImageTitle || "Image précédente"} title={textContent.previousImageTitle || "Image précédente"}>

website/src/styles/_responsive.scss

@@ -265,13 +265,8 @@
   }
 
   .image-viewer-gallery {
-    grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
     gap: var(--space-3);
-  }
-
-  .image-viewer-gallery-frame {
-    min-height: 180px;
-    height: min(42vh, 260px);
+    padding: var(--space-3);
   }
 
   .module-column {

website/src/styles/overlays/_image-viewer.scss

@@ -70,6 +70,17 @@
   gap: var(--space-2);
 }
 
+.image-viewer-gallery-zoom {
+  display: inline-flex;
+  gap: 4px;
+}
+
+.image-viewer-gallery-zoom-button > span {
+  font-size: 20px;
+  font-weight: 800;
+  line-height: 1;
+}
+
 .image-viewer-button {
   flex: 0 0 40px;
 }
@@ -196,25 +207,39 @@
 }
 
 .image-viewer.is-gallery {
+  min-width: 0;
+  overflow: hidden;
   height: min(860px, calc(100vh - 48px));
   grid-template-rows: auto minmax(0, 1fr);
 }
 
 .image-viewer-gallery {
-  display: grid;
+  --image-gallery-thumbnail-width: 260px;
+  display: flex;
+  width: 100%;
+  max-width: 100%;
   min-height: 0;
-  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
+  min-width: 0;
+  flex-wrap: wrap;
   align-content: start;
-  gap: var(--space-4);
+  justify-content: center;
+  gap: 12px;
+  overflow-x: hidden;
   overflow-y: auto;
   overscroll-behavior: contain;
-  padding: 2px 6px 2px 2px;
+  padding: 20px 28px 28px;
 }
 
 .image-viewer-gallery-item {
   display: grid;
+  width: min(100%, var(--image-gallery-thumbnail-width));
+  max-width: 100%;
   min-width: 0;
-  gap: 10px;
+  aspect-ratio: 4 / 3;
+  flex: 0 1 var(--image-gallery-thumbnail-width);
+  grid-template-rows: minmax(0, 1fr) auto;
+  align-self: flex-start;
+  gap: 8px;
   padding: 10px;
   color: var(--color-text);
   text-align: left;
@@ -228,8 +253,9 @@
 
 .image-viewer-gallery-frame {
   display: grid;
-  min-height: 200px;
-  height: clamp(200px, 24vh, 280px);
+  width: 100%;
+  height: 100%;
+  min-height: 0;
   place-items: center;
   overflow: hidden;
   border-radius: var(--radius-md);
@@ -245,6 +271,7 @@
 
 .image-viewer-gallery-caption {
   display: grid;
+  width: 100%;
   min-width: 0;
   grid-template-columns: minmax(0, 1fr) auto;
   align-items: center;