feat(ui): forge icons on repo cards (github, gitea, mozilla)

Add SVG icons for each forge before the repo name on dashboard cards.
Icons sourced from user-provided SVGs in ui/public/.

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

ui/src/App.css

@@ -105,6 +105,14 @@ a.hot-pink {
   font-size: 0.9rem;
 }
 
+.forge-icon {
+  width: 16px;
+  height: 16px;
+  margin-right: 6px;
+  vertical-align: -2px;
+  opacity: 0.7;
+}
+
 .project-card a {
   color: #ff4081;
 }

ui/src/pages/DashPage.tsx

@@ -57,7 +57,7 @@ function ProjectCard({ project: p }: { project: ProjectSummary }) {
   return (
     <Link to={`/project/${p.source}/${p.repo}`} className="text-decoration-none">
       <div className="project-card p-3">
-        <h5 className="mb-1">{p.repo}</h5>
+        <h5 className="mb-1"><img src={forgeIcon(p.source)} alt={p.source} className="forge-icon" />{p.repo}</h5>
         <small className="text-muted d-block mb-2">
           {p.source}
           {topLangs && ` · ${topLangs}`}
@@ -75,6 +75,15 @@ function ProjectCard({ project: p }: { project: ProjectSummary }) {
   );
 }
 
+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 topLanguages(langs: Record<string, number>, n: number): string {
   return Object.entries(langs)
     .sort(([, a], [, b]) => b - a)