feat(ui): forge icon on project page header

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/ProjectPage.tsx

@@ -54,8 +54,7 @@ export function ProjectPage() {
     <>
       <Row className="mb-3">
         <Col>
-          <h2>{repo}</h2>
-          <small className="text-muted">{source}</small>
+          <h2><img src={forgeIcon(source ?? '')} alt={source} className="forge-icon" style={{ width: 24, height: 24 }} />{repo}</h2>
           {langs && <LanguageBar languages={langs} />}
         </Col>
       </Row>
@@ -90,6 +89,15 @@ export function ProjectPage() {
   );
 }
 
+function forgeIcon(source: string): string {
+  switch (source) {
+    case 'github': return '/github.svg';
+    case 'gitea': return '/gitea.svg';
+    case 'hg': return '/mozilla.svg';
+    default: return '/github.svg';
+  }
+}
+
 function LanguageBar({ languages }: { languages: Record<string, number> }) {
   const total = Object.values(languages).reduce((a, b) => a + b, 0);
   if (total === 0) return null;