feat: en-tete allege, compte utilisateur en sidebar et pellicule d'images defilable (molette + fleches) #112

frontend/js/viewer.js

@@ -700,8 +700,26 @@ export function renderImageViewer(area, data) {
   container.appendChild(body);
 
   // ── Thumbnail filmstrip (navigation) ───────────────────────────────────
-  const strip = el("div", { class: "image-nav-strip", hidden: true });
-  container.appendChild(strip);
+  // #112 — the film scrolls with the mouse wheel and two translucent edge
+  // arrows; the scrollable strip is wrapped so the arrows stay fixed.
+  const navWrap = el("div", { class: "image-nav", hidden: true });
+  const strip = el("div", { class: "image-nav-strip" });
+  const stripPrev = el("button", {
+    class: "image-strip-arrow image-strip-arrow-prev",
+    type: "button",
+    title: t("viewer.image_strip_prev"),
+    "aria-label": t("viewer.image_strip_prev"),
+  }, [icon("chevron-left", 20)]);
+  const stripNext = el("button", {
+    class: "image-strip-arrow image-strip-arrow-next",
+    type: "button",
+    title: t("viewer.image_strip_next"),
+    "aria-label": t("viewer.image_strip_next"),
+  }, [icon("chevron-right", 20)]);
+  navWrap.appendChild(strip);
+  navWrap.appendChild(stripPrev);
+  navWrap.appendChild(stripNext);
+  container.appendChild(navWrap);
 
   let scale = 1;
   let tx = 0;
@@ -807,8 +825,8 @@ export function renderImageViewer(area, data) {
   };
 
   const renderStrip = () => {
-    if (siblings.length < 2) { strip.hidden = true; return; }
-    strip.hidden = false;
+    if (siblings.length < 2) { navWrap.hidden = true; return; }
+    navWrap.hidden = false;
     strip.innerHTML = "";
     thumbs = siblings.map((s, i) => {
       const thumb = el("img", {
@@ -826,6 +844,20 @@ export function renderImageViewer(area, data) {
     updateStripActive();
   };
 
+  // #112 — scroll the film with the wheel (vertical → horizontal) and the
+  // two overlay arrows; the active image never changes, only the strip view.
+  const scrollStrip = (dir) => {
+    strip.scrollBy({ left: dir * Math.max(140, strip.clientWidth * 0.8), behavior: "smooth" });
+  };
+  stripPrev.addEventListener("click", () => scrollStrip(-1));
+  stripNext.addEventListener("click", () => scrollStrip(1));
+  strip.addEventListener("wheel", (e) => {
+    if (strip.scrollWidth <= strip.clientWidth) return;
+    const delta = Math.abs(e.deltaY) > Math.abs(e.deltaX) ? e.deltaY : e.deltaX;
+    strip.scrollLeft += delta;
+    e.preventDefault();
+  }, { passive: false });
+
   (async () => {
     try {
       const dir = currentPath.includes("/") ? currentPath.slice(0, currentPath.lastIndexOf("/")) : "";