fix: article reader scroll lock + click-to-zoom for body images

WebKitGTK collapses body <img> elements to 0 height during re-decode,
shrinking scrollHeight and clamping scrollTop — articles with body images
locked partway down. Give every .prose-article img a fixed 16:9
aspect-ratio + object-fit: contain so the layout box survives the collapse
and scrollHeight stays constant. Body images now click-to-open the existing
ImageLightbox (with cursor: zoom-in affordance), and the lightbox image
itself now closes on click instead of swallowing it.

src/components/article/ArticleView.tsx

@@ -10,6 +10,7 @@ import { nip19 } from "@nostr-dev-kit/ndk";
 import { useProfile } from "../../hooks/useProfile";
 import { profileName } from "../../lib/utils";
 import { ZapModal } from "../zap/ZapModal";
+import { ImageLightbox } from "../shared/ImageLightbox";
 
 // ── Types ────────────────────────────────────────────────────────────────────
 
@@ -138,6 +139,18 @@ export function ArticleView() {
   const [progress, setProgress] = useState(0);
   const [headings, setHeadings] = useState<TocHeading[]>([]);
   const [activeId, setActiveId] = useState("");
+  const [lightbox, setLightbox] = useState<{ images: string[]; index: number } | null>(null);
+
+  const handleContentClick = useCallback((e: React.MouseEvent<HTMLDivElement>) => {
+    const target = e.target as HTMLElement;
+    if (!(target instanceof HTMLImageElement)) return;
+    const root = contentRef.current;
+    if (!root) return;
+    const imgs = Array.from(root.querySelectorAll<HTMLImageElement>("img"));
+    const index = imgs.indexOf(target);
+    if (index < 0) return;
+    setLightbox({ images: imgs.map((img) => img.src), index });
+  }, []);
 
   // Extract headings from rendered content and assign IDs
   useEffect(() => {
@@ -398,8 +411,17 @@ export function ArticleView() {
               <div
                 ref={contentRef}
                 className="prose-article"
+                onClick={handleContentClick}
                 dangerouslySetInnerHTML={{ __html: bodyHtml }}
               />
+              {lightbox && (
+                <ImageLightbox
+                  images={lightbox.images}
+                  index={lightbox.index}
+                  onClose={() => setLightbox(null)}
+                  onNavigate={(i) => setLightbox({ ...lightbox, index: i })}
+                />
+              )}
 
               {/* Footer */}
               <div className="mt-10 pt-6 border-t border-border flex items-center justify-between">

src/components/shared/ImageLightbox.tsx

@@ -60,12 +60,12 @@ export function ImageLightbox({ images, index, onClose, onNavigate }: ImageLight
         </button>
       )}
 
-      {/* Image */}
+      {/* Image — click to close (same gesture as clicking the backdrop) */}
       <img
         src={images[index]}
         alt={`Image ${index + 1} of ${images.length}`}
-        className="max-w-[90vw] max-h-[90vh] object-contain select-none"
-        onClick={(e) => e.stopPropagation()}
+        className="max-w-[90vw] max-h-[90vh] object-contain select-none cursor-zoom-out"
+        onClick={onClose}
         draggable={false}
       />
 

src/index.css

@@ -104,7 +104,10 @@ html.font-readable body {
 .prose-article a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
 .prose-article hr { border: none; border-top: 1px solid var(--color-border); margin: 2em 0; }
 .prose-article strong { color: var(--color-text); font-weight: 600; }
-.prose-article img { max-width: 100%; border-radius: 2px; margin: 1em 0; }
+/* WebKitGTK scroll-lock workaround: body <img> sometimes collapses to 0 height on re-decode,
+   shrinking scrollHeight and clamping the scroll. A fixed aspect-ratio reserves a layout box
+   that survives the collapse. object-fit: contain preserves the image's own ratio inside it. */
+.prose-article img { display: block; width: 100%; max-width: 100%; aspect-ratio: 16 / 9; object-fit: contain; background: var(--color-bg-raised); border-radius: 2px; margin: 1em 0; cursor: zoom-in; }
 
 /* View transition fade-in */
 @keyframes fade-in {