Remove test accounts button

Remove the hidden create-test-accounts button from the Auth page to disable test account creation from the UI. No changes to backend logic; only UI element removal.

X-Lovable-Edit-ID: edt-db7b0d9e-109b-48ef-8614-6e0dd8faa865

Author: lovable-dev[bot]

src/pages/Auth.tsx

@@ -220,16 +220,6 @@ export default function Auth() {
               >
                 {loading ? "Entrando..." : "Entrar"}
               </Button>
-              
-              <div className="text-center pt-2">
-                <button
-                  type="button"
-                  onClick={() => navigate("/create-test-accounts")}
-                  className="text-white/50 text-xs hover:text-white/80 transition-colors underline-offset-2 hover:underline"
-                >
-                  🧪 Criar contas de teste
-                </button>
-              </div>
             </form>
           </div>
         </div>