feat: ingest icon/banner/screenshots from source repo

app/admin/_tabs/marketplace.tsx

@@ -18,6 +18,8 @@ interface Extension {
   minAppVersion: string | null;
   latestVersion: string | null;
   installed: boolean;
+  iconUrl: string | null;
+  bannerUrl: string | null;
   author: {
     displayName: string;
     githubLogin: string;
@@ -259,10 +261,27 @@ function ExtensionCard({
 
   return (
     <div className="group relative border border-border rounded-lg overflow-hidden hover:border-ring/30 transition-colors">
+      {extension.bannerUrl && (
+        <Link href={previewHref} className="block focus:outline-none">
+          <img
+            src={extension.bannerUrl}
+            alt=""
+            className="block h-24 w-full object-cover border-b border-border"
+            loading="lazy"
+          />
+        </Link>
+      )}
       <Link href={previewHref} className="block p-4 focus:outline-none focus-visible:ring-2 focus-visible:ring-ring/40 rounded-lg">
         <div className="flex items-start gap-3">
-          <div className="w-10 h-10 rounded-md bg-muted flex items-center justify-center shrink-0">
-            {isPlugin ? (
+          <div className="w-10 h-10 rounded-md bg-muted flex items-center justify-center shrink-0 overflow-hidden">
+            {extension.iconUrl ? (
+              <img
+                src={extension.iconUrl}
+                alt=""
+                className="w-10 h-10 object-cover"
+                loading="lazy"
+              />
+            ) : isPlugin ? (
               <Puzzle className="w-5 h-5 text-muted-foreground" />
             ) : (
               <SwatchBook className="w-5 h-5 text-muted-foreground" />

app/admin/marketplace/[slug]/page.tsx

@@ -37,6 +37,8 @@ interface PreviewData {
     githubRepo: string | null;
     license: string | null;
     minAppVersion: string | null;
+    iconUrl: string | null;
+    bannerUrl: string | null;
     author: {
       displayName: string;
       githubLogin: string;
@@ -209,11 +211,30 @@ export default function MarketplacePreviewPage() {
         <ArrowLeft className="w-4 h-4" /> Back to Marketplace
       </Link>
 
+      {/* Banner / hero */}
+      {ext.bannerUrl && (
+        <div className="mb-6 overflow-hidden rounded-lg border border-border bg-muted">
+          <img
+            src={ext.bannerUrl}
+            alt=""
+            className="block w-full max-h-64 object-cover"
+            loading="lazy"
+          />
+        </div>
+      )}
+
       {/* Header */}
       <div className="flex flex-col gap-4 sm:flex-row sm:items-start">
         <div className="flex items-start gap-4 flex-1 min-w-0">
-          <div className="w-14 h-14 rounded-lg bg-muted flex items-center justify-center shrink-0">
-            {isPlugin ? (
+          <div className="w-14 h-14 rounded-lg bg-muted flex items-center justify-center shrink-0 overflow-hidden">
+            {ext.iconUrl ? (
+              <img
+                src={ext.iconUrl}
+                alt=""
+                className="w-14 h-14 object-cover"
+                loading="lazy"
+              />
+            ) : isPlugin ? (
               <Puzzle className="w-7 h-7 text-muted-foreground" />
             ) : (
               <SwatchBook className="w-7 h-7 text-muted-foreground" />

app/api/admin/marketplace/[slug]/route.ts

@@ -168,6 +168,11 @@ export async function GET(
         }))
       : [];
 
+    const fileUrl = (path: unknown): string | null =>
+      typeof path === 'string' && path
+        ? new URL(`/api/v1/files/${path}`, DIRECTORY_URL).toString()
+        : null;
+
     return NextResponse.json(
       {
         extension: {
@@ -184,6 +189,8 @@ export async function GET(
           githubRepo: extension.githubRepo ?? null,
           license: extension.license ?? null,
           minAppVersion: extension.minAppVersion ?? null,
+          iconUrl: fileUrl(extension.iconPath),
+          bannerUrl: fileUrl(extension.bannerPath),
           author: extension.author ?? null,
           latestVersion,
           versions,

app/api/admin/marketplace/route.ts

@@ -60,9 +60,16 @@ export async function GET(request: NextRequest) {
     const installedPlugins = new Set(pluginRegistry.plugins.map(p => p.id));
     const installedThemes = new Set(themeRegistry.themes.map(t => t.id));
 
+    const fileUrl = (path: unknown): string | null =>
+      typeof path === 'string' && path
+        ? new URL(`/api/v1/files/${path}`, DIRECTORY_URL).toString()
+        : null;
+
     if (data.data) {
       data.data = data.data.map((ext: Record<string, unknown>) => ({
         ...ext,
+        iconUrl: fileUrl(ext.iconPath),
+        bannerUrl: fileUrl(ext.bannerPath),
         installed: ext.type === 'theme'
           ? installedThemes.has(ext.slug as string)
           : installedPlugins.has(ext.slug as string),

lib/plugin-types.ts

@@ -53,7 +53,23 @@ export interface ThemeManifest {
   author: string;
   description: string;
   type: 'theme';
+  /** @deprecated kept as alias for `banner` so existing themes still work. */
   preview?: string;
+  /**
+   * Path inside the source repo (relative to manifest.json) to a square
+   * brand icon shown in marketplace cards and the host's theme picker.
+   */
+  icon?: string;
+  /**
+   * Path to a wide promo image shown as the hero on the theme detail
+   * page. PNG/JPG/WebP, ≤512 KB.
+   */
+  banner?: string;
+  /**
+   * Up to 6 screenshot paths shown in the gallery on the detail page.
+   * Themes typically use this to show light + dark variants.
+   */
+  screenshots?: string[];
   variants: ThemeVariant[];
   minAppVersion?: string;
 
@@ -100,6 +116,25 @@ export interface PluginManifest {
    * Validated at install time and merged into the host CSP `frame-src`.
    */
   frameOrigins?: string[];
+
+  // ─── Marketplace media (NOT shipped in the runtime zip) ──────
+  /**
+   * Path inside the source repo (relative to manifest.json) to a square
+   * brand icon. PNG/SVG/WebP, ≤256 KB, 128×128 or larger recommended.
+   * The extension directory ingests this from git and serves it on
+   * marketplace cards and the host's plugin admin UI.
+   */
+  icon?: string;
+  /**
+   * Path to a wide promo image (16:9 recommended), shown as the hero on
+   * the extension detail page. PNG/JPG/WebP, ≤512 KB.
+   */
+  banner?: string;
+  /**
+   * Up to 6 screenshot paths shown in the gallery on the detail page.
+   * Each ≤512 KB; total ≤2 MB. Order is preserved.
+   */
+  screenshots?: string[];
 }
 
 export interface SettingFieldSchema {