refactor(command-palette): extract groups into declarative registry

src/components/command-palette/registry/groups/commits.tsx

@@ -0,0 +1,28 @@
+import { GitCommit } from 'lucide-react';
+
+import { useCommitsSource } from '../../sources/useCommitsSource';
+import type { GroupConfig } from '../types';
+
+export const commitsGroup: GroupConfig = {
+  id: 'commits',
+  heading: 'Commits',
+  modes: ['mixed', 'commits'],
+  prefix: { char: '#', mode: 'commits' },
+  requiresProject: true,
+  useItems: (ctx) => {
+    const { items: commits } = useCommitsSource(ctx.projectId, ctx.enabled);
+    return commits.map((c) => ({
+      key: `commit-${c.hash}`,
+      value: `${c.shortHash} ${c.message} ${c.author}`,
+      onSelect: () => ctx.run(() => ctx.onShowTab?.('git')),
+      node: (
+        <>
+          <GitCommit className="h-4 w-4 shrink-0 text-muted-foreground" aria-hidden />
+          <span className="font-mono text-xs text-muted-foreground">{c.shortHash}</span>
+          <span className="flex-1 truncate">{c.message}</span>
+          <span className="truncate text-xs text-muted-foreground">{c.author}</span>
+        </>
+      ),
+    }));
+  },
+};