website: download on site instead of opening new tab

frontend/apps/artcraft-website/src/components/generation-gallery/GalleryCard.tsx

@@ -11,9 +11,10 @@ import {
   faSpinnerThird,
   faVideo,
 } from "@fortawesome/pro-solid-svg-icons";
-import { addCorsParam, PLACEHOLDER_IMAGES } from "@storyteller/common";
+import { PLACEHOLDER_IMAGES } from "@storyteller/common";
 import { Tooltip } from "@storyteller/ui-tooltip";
 import { toast } from "@storyteller/ui-toaster";
+import { downloadMediaFile } from "../../lib/download-media";
 import {
   getModelCreatorIconPath,
   getModelDisplayName,
@@ -119,6 +120,7 @@ export const GalleryCard = memo(function GalleryCard({
   const [ratio, setRatio] = useState<number | undefined>(cached);
   const [shareCopied, setShareCopied] = useState(false);
   const [isRecreating, setIsRecreating] = useState(false);
+  const [isDownloading, setIsDownloading] = useState(false);
   const isVideo = item.mediaClass === "video";
   const is3D = item.mediaClass === "dimensional";
   const recreateMediaClass: RecreateMediaClass | null = isVideo
@@ -277,9 +279,23 @@ export const GalleryCard = memo(function GalleryCard({
     [item, onClick],
   );
 
-  const downloadHref = item.fullImage
-    ? addCorsParam(item.fullImage) || item.fullImage
-    : undefined;
+  const handleDownload = useCallback(
+    async (e: React.MouseEvent) => {
+      e.stopPropagation();
+      if (!item.fullImage || isDownloading) return;
+      setIsDownloading(true);
+      try {
+        await downloadMediaFile({
+          url: item.fullImage,
+          filename: `artcraft-${item.id}`,
+          mediaClass: item.mediaClass,
+        });
+      } finally {
+        setIsDownloading(false);
+      }
+    },
+    [item.fullImage, item.id, item.mediaClass, isDownloading],
+  );
 
   return (
     <div
@@ -385,19 +401,20 @@ export const GalleryCard = memo(function GalleryCard({
               />
             </button>
           </Tooltip>
-          {downloadHref && (
+          {item.fullImage && (
             <Tooltip content="Download" position="top">
-              <a
-                href={downloadHref}
-                download={`artcraft-${item.id}`}
-                target="_blank"
-                rel="noopener noreferrer"
-                onClick={(e) => e.stopPropagation()}
-                className="flex h-7 w-7 items-center justify-center rounded-md text-white/85 transition-colors hover:bg-white/15 hover:text-white"
+              <button
+                type="button"
+                onClick={handleDownload}
+                disabled={isDownloading}
+                className="flex h-7 w-7 items-center justify-center rounded-md text-white/85 transition-colors hover:bg-white/15 hover:text-white disabled:opacity-60"
                 aria-label="Download"
               >
-                <FontAwesomeIcon icon={faArrowDownToLine} className="text-sm" />
-              </a>
+                <FontAwesomeIcon
+                  icon={isDownloading ? faSpinnerThird : faArrowDownToLine}
+                  className={`text-sm ${isDownloading ? "animate-spin" : ""}`}
+                />
+              </button>
             </Tooltip>
           )}
         </div>

frontend/apps/artcraft-website/src/components/lightbox/LightboxDetails.tsx

@@ -14,12 +14,12 @@ import {
   faImage,
   faLink,
   faPencil,
+  faSpinnerThird,
   faTrashCan,
   faUser,
   faXmark,
 } from "@fortawesome/pro-solid-svg-icons";
 import {
-  addCorsParam,
   getContextImageThumbnail,
   THUMBNAIL_SIZES,
 } from "@storyteller/common";
@@ -29,6 +29,7 @@ import {
   getProviderDisplayName,
   getProviderIconByName,
 } from "@storyteller/model-list";
+import { downloadMediaFile } from "../../lib/download-media";
 import {
   formatAspectRatio,
   formatDuration,
@@ -88,6 +89,7 @@ export function LightboxDetails({
 }: LightboxDetailsProps) {
   const promptCopy = useCopyFeedback();
   const shareCopy = useCopyFeedback();
+  const [isDownloading, setIsDownloading] = useState(false);
 
   const [isPromptExpanded, setIsPromptExpanded] = useState(false);
   const [isPromptClamped, setIsPromptClamped] = useState(false);
@@ -95,6 +97,7 @@ export function LightboxDetails({
 
   useEffect(() => {
     setIsPromptExpanded(false);
+    setIsDownloading(false);
   }, [mediaToken]);
 
   useEffect(() => {
@@ -368,23 +371,33 @@ export function LightboxDetails({
           >
             {shareCopy.copied ? "Copied" : "Share"}
           </Button>
-          <a
+          <button
+            type="button"
+            disabled={!mediaUrl || isDownloading}
+            onClick={async () => {
+              if (!mediaUrl || isDownloading) return;
+              setIsDownloading(true);
+              try {
+                await downloadMediaFile({
+                  url: mediaUrl,
+                  filename: `artcraft-${mediaToken || "media"}`,
+                });
+              } finally {
+                setIsDownloading(false);
+              }
+            }}
             className={`w-full inline-flex items-center justify-center gap-2 rounded-md px-3 py-2 text-sm font-medium transition-colors border border-ui-panel-border ${
               mediaUrl
-                ? "bg-ui-controls/40 hover:bg-ui-controls/60 text-white"
-                : "bg-ui-controls/20 text-white/60 cursor-not-allowed pointer-events-none"
+                ? "bg-ui-controls/40 hover:bg-ui-controls/60 text-white disabled:opacity-60"
+                : "bg-ui-controls/20 text-white/60 cursor-not-allowed"
             }`}
-            href={mediaUrl ? addCorsParam(mediaUrl) || mediaUrl : undefined}
-            download={
-              mediaUrl ? `artcraft-${mediaToken || "media"}` : undefined
-            }
-            aria-disabled={!mediaUrl}
-            target="_blank"
-            rel="noopener noreferrer"
           >
-            <FontAwesomeIcon icon={faArrowDownToLine} />
-            Download
-          </a>
+            <FontAwesomeIcon
+              icon={isDownloading ? faSpinnerThird : faArrowDownToLine}
+              className={isDownloading ? "animate-spin" : ""}
+            />
+            {isDownloading ? "Downloading…" : "Download"}
+          </button>
         </div>
         {onRecreate && promptData.hasToken && (
           <Button

frontend/apps/artcraft-website/src/lib/download-media.ts

@@ -0,0 +1,54 @@
+import { addCorsParam } from "@storyteller/common";
+import { toast } from "@storyteller/ui-toaster";
+
+const EXT_BY_MEDIA_CLASS: Record<string, string> = {
+  image: "png",
+  video: "mp4",
+  dimensional: "glb",
+};
+
+function extensionForUrl(url: string, mediaClass?: string | null): string {
+  try {
+    const pathname = new URL(url, window.location.href).pathname;
+    const match = pathname.match(/\.([a-z0-9]{2,5})$/i);
+    if (match) return match[1].toLowerCase();
+  } catch {
+    // ignore — fall through to mediaClass default
+  }
+  if (mediaClass && EXT_BY_MEDIA_CLASS[mediaClass]) {
+    return EXT_BY_MEDIA_CLASS[mediaClass];
+  }
+  return "bin";
+}
+
+export async function downloadMediaFile({
+  url,
+  filename,
+  mediaClass,
+}: {
+  url: string;
+  filename: string;
+  mediaClass?: string | null;
+}): Promise<void> {
+  const corsUrl = addCorsParam(url) || url;
+  let blobUrl: string | null = null;
+  try {
+    const response = await fetch(corsUrl, { credentials: "omit" });
+    if (!response.ok) throw new Error(`HTTP ${response.status}`);
+    const blob = await response.blob();
+    blobUrl = window.URL.createObjectURL(blob);
+
+    const ext = extensionForUrl(url, mediaClass);
+    const a = document.createElement("a");
+    a.style.display = "none";
+    a.href = blobUrl;
+    a.download = `${filename}.${ext}`;
+    document.body.appendChild(a);
+    a.click();
+    a.remove();
+  } catch {
+    toast.error("Could not download file.");
+  } finally {
+    if (blobUrl) window.URL.revokeObjectURL(blobUrl);
+  }
+}