feat: chat — boutons discrets sous l'image, image en onglet d'app, point de non-lus, notification OS, suppression annulable BUG-110

frontend/js/viewer.js

@@ -727,7 +727,7 @@ export function renderImageViewer(area, data) {
   // of re-rendering the whole viewer (which used to refetch the file + listing).
   let currentPath = data.path;
   let currentTitle = data.title || (currentPath || "").split("/").pop();
-  let imgUrl = buildImageUrl(vault, currentPath);
+  let imgUrl = data.url || buildImageUrl(vault, currentPath);
   let currentMeta = {
     image_mime: data.image_mime || imageMimeFor(currentPath),
     size_bytes: data.size_bytes,
@@ -959,6 +959,7 @@ export function renderImageViewer(area, data) {
   }, { passive: false });
 
   (async () => {
+    if (!vault) return; // #110 — pièce jointe de chat : pas de listing voisin
     try {
       const dir = currentPath.includes("/") ? currentPath.slice(0, currentPath.lastIndexOf("/")) : "";
       siblings = await listImageSiblings(vault, dir);
@@ -1023,7 +1024,8 @@ export function renderImageViewer(area, data) {
   nextBtn.addEventListener("click", () => go(1));
   originalBtn.addEventListener("click", () => window.open(imgUrl, "_blank"));
   downloadBtn.addEventListener("click", () => {
-    const dlUrl = `/api/file/${encodeURIComponent(vault)}/download?path=${encodeURIComponent(currentPath)}`;
+    // #110 — une pièce jointe de chat n'est pas dans un vault : URL directe.
+    const dlUrl = data.url || `/api/file/${encodeURIComponent(vault)}/download?path=${encodeURIComponent(currentPath)}`;
     window.open(dlUrl, "_blank");
   });
   metaBtn.setAttribute("aria-pressed", _imageViewerState.meta ? "true" : "false");