Fix login redirect — access result.data.token/user

Login/register pages now correctly unwrap API response {data: {token, user}}.
Cleaned up leftover apiFetch code.

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

apps/tasks/lib/api.ts

@@ -36,14 +36,14 @@ async function apiFetch<T>(path: string, opts: ApiOptions = {}): Promise<T> {
 
 // Auth
 export function register(data: { email: string; name: string; phone?: string }) {
-  return apiFetch<{ token: string; user: User }>("/api/v1/auth/register", {
+  return apiFetch<{ data: { token: string; user: User } }>("/api/v1/auth/register", {
     method: "POST",
     body: data,
   });
 }
 
 export function login(data: { email: string; password?: string }) {
-  return apiFetch<{ token: string; user: User }>("/api/v1/auth/login", {
+  return apiFetch<{ data: { token: string; user: User } }>("/api/v1/auth/login", {
     method: "POST",
     body: data,
   });