Markdown images in descriptions, gated and framed

Images already flowed through render_inline_markdown ungated; they
now take the same scheme gate as links (https or same-origin only -
no data:, no plain http) and render as full-width framed figures in
alternative, feature, and item-card descriptions. Carries whole-site
imagery for content-driven instances (westra).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Y42TyF8Zu7NGRR2893vNcZ

style/main.css

@@ -536,6 +536,18 @@ main.not-found {
   color: var(--accent);
 }
 
+/* images inside markdown descriptions: full-width figures in the
+   card's flow, framed like the rest of the press sheet */
+.alt-description img,
+.item-card-description img,
+.feature p img {
+  display: block;
+  width: 100%;
+  margin: 0.6rem 0 0.2rem;
+  border-radius: 0.5rem;
+  border: 0.06rem solid var(--line);
+}
+
 .alt-description code,
 .feature p code {
   font-size: 0.9em;