fix: cover as public-path string (Sveltia uploads) + render cover in article

src/content.config.ts

@@ -6,14 +6,15 @@ import { glob } from 'astro/loaders';
 // renders them to static HTML at build time.
 const news = defineCollection({
   loader: glob({ pattern: '**/*.md', base: './src/content/news' }),
-  schema: ({ image }) =>
-    z.object({
+  schema: z.object({
     title: z.string(),
     description: z.string(),
     date: z.coerce.date(),
     category: z.string().default('news'),
     author: z.string().default('CTAO'),
-      cover: image().optional(),
+    // Public-path string, e.g. "/uploads/foo.jpg" — Sveltia uploads media to
+    // public/uploads, which Astro's image() helper can't validate (src/ only).
+    cover: z.string().optional(),
     draft: z.boolean().default(false),
   }),
 });

src/pages/news/[slug].astro

@@ -16,6 +16,7 @@ const fmt = (d) => new Intl.DateTimeFormat('pl-PL', { dateStyle: 'long' }).forma
     <a class="back" href="/">← Wszystkie newsy</a>
     <h1>{post.data.title}</h1>
     <div class="meta">{post.data.category} · {post.data.author} · {fmt(post.data.date)}</div>
+    {post.data.cover && <img class="cover" src={post.data.cover} alt="" />}
     <div class="prose">
       <Content />
     </div>

src/styles/global.css

@@ -135,6 +135,7 @@ img { max-width: 100%; height: auto; display: block; }
   line-height: 1.15; letter-spacing: -0.02em;
 }
 .article .meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 28px; }
+.article .cover { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 28px; }
 .prose h2 { margin: 34px 0 10px; font-size: 1.45rem; letter-spacing: -0.01em; }
 .prose h3 { margin: 26px 0 8px; font-size: 1.15rem; }
 .prose p { margin: 0 0 16px; }