fix: resolve Prettier markdown code block parsing errors

- Fix syntax errors in skills markdown files (.github/skills, .opencode/skills)
- Change typescript to tsx for code blocks with JSX
- Replace ellipsis (...) in array examples with valid syntax
- Separate CSS from TypeScript into distinct code blocks
- Convert JavaScript object examples to valid JSON in docs
- Fix enum definitions with proper comma separation

lib/auth/client.ts

@@ -0,0 +1,8 @@
+"use client";
+
+import { createAuthClient } from "@neondatabase/auth/next";
+
+export const authClient = createAuthClient();
+
+// Export commonly used hooks for convenience
+export const { useSession } = authClient;