feat(cli): TUI complete overhaul — components, sidebar, search, branding (#157)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/cli/src/tui/hooks/use-git-info.ts

@@ -0,0 +1,29 @@
+import { useState, useEffect } from 'react';
+import { execSync } from 'node:child_process';
+
+export interface GitInfo {
+  branch: string | null;
+  cwd: string;
+}
+
+export function useGitInfo(): GitInfo {
+  const [info, setInfo] = useState<GitInfo>({
+    branch: null,
+    cwd: process.cwd(),
+  });
+
+  useEffect(() => {
+    try {
+      const branch = execSync('git rev-parse --abbrev-ref HEAD', {
+        encoding: 'utf-8',
+        timeout: 3000,
+        stdio: ['pipe', 'pipe', 'pipe'],
+      }).trim();
+      setInfo({ branch, cwd: process.cwd() });
+    } catch {
+      setInfo({ branch: null, cwd: process.cwd() });
+    }
+  }, []);
+
+  return info;
+}