feat: visionneuse d'images - navigation fluide, image ajustee au cadre, fleches laterales et pellicule persistante #111

frontend/style.css

@@ -9640,10 +9640,17 @@ body.desktop-mode .editor-container {
 }
 
 /* #108-D — dedicated image viewer: zoom, pan, filmstrip, metadata, lightbox */
+/* #111 — the viewer owns the whole content box (no page scrolling): the image
+   is always resized to the available frame and the toolbar/filmstrip stay put. */
+.content-area:has(> .image-viewer-container) {
+  padding: 0;
+  overflow: hidden;
+}
 .image-viewer-container {
   display: flex;
   flex-direction: column;
   height: 100%;
+  min-height: 0;
   outline: none;
 }
 .image-toolbar {
@@ -9673,10 +9680,25 @@ body.desktop-mode .editor-container {
   min-width: 46px;
   text-align: center;
 }
+.image-counter {
+  font-variant-numeric: tabular-nums;
+  font-size: 0.75rem;
+  color: var(--text-secondary);
+  padding: 0 6px;
+  white-space: nowrap;
+}
+.image-counter[hidden] {
+  display: none;
+}
 .image-viewer-body {
   flex: 1;
   display: flex;
+  /* #111 — stretch (not center) so .image-stage is capped to the body height and
+     the image can actually resolve max-height:100% against a definite frame. */
+  align-items: stretch;
+  padding: 0;
   min-height: 0;
+  overflow: hidden;
 }
 .image-stage {
   flex: 1;
@@ -9686,6 +9708,9 @@ body.desktop-mode .editor-container {
   align-items: center;
   justify-content: center;
   min-width: 0;
+  min-height: 0;
+  padding: 16px;
+  box-sizing: border-box;
   background: var(--surface2);
   cursor: grab;
   touch-action: none;
@@ -9694,6 +9719,8 @@ body.desktop-mode .editor-container {
   cursor: grabbing;
 }
 .image-main {
+  width: auto;
+  height: auto;
   max-width: 100%;
   max-height: 100%;
   object-fit: contain;
@@ -9706,6 +9733,58 @@ body.desktop-mode .editor-container {
   color: var(--text-secondary);
   font-size: 0.9rem;
 }
+
+/* #111 — translucent overlay arrows along the frame edges (revealed on hover) */
+.image-nav-arrow {
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  width: clamp(44px, 6vw, 84px);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0;
+  border: none;
+  background: transparent;
+  color: #fff;
+  opacity: 0;
+  cursor: pointer;
+  z-index: 6;
+  transition: opacity 160ms ease, background 160ms ease;
+}
+.image-nav-arrow[hidden] {
+  display: none;
+}
+.image-nav-arrow-prev {
+  left: 0;
+}
+.image-nav-arrow-next {
+  right: 0;
+}
+.image-nav-arrow-prev:hover,
+.image-nav-arrow-prev:focus-visible {
+  background: linear-gradient(to right, rgba(0, 0, 0, 0.42), transparent);
+}
+.image-nav-arrow-next:hover,
+.image-nav-arrow-next:focus-visible {
+  background: linear-gradient(to left, rgba(0, 0, 0, 0.42), transparent);
+}
+.image-stage:hover .image-nav-arrow {
+  opacity: 0.4;
+}
+.image-stage .image-nav-arrow:hover,
+.image-stage .image-nav-arrow:focus-visible {
+  opacity: 1;
+  outline: none;
+}
+.image-nav-arrow .icon {
+  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.85));
+}
+@media (hover: none) {
+  .image-nav-arrow {
+    opacity: 0.55;
+  }
+}
 .image-nav-strip {
   display: flex;
   gap: 6px;