Test CI/CD pipeline: add API version, update Login page

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

frontend/src/pages/Login.tsx

@@ -26,7 +26,7 @@ const Login = () => {
     return (
         <div className="flex min-h-screen items-center justify-center bg-base text-content transition-colors">
             <div className="w-full max-w-md p-8 bg-surface rounded-2xl shadow-lg border border-border">
-                <Heading level={2} className="mb-6 text-center text-primary">HealthyFit Login</Heading>
+                <Heading level={2} className="mb-6 text-center text-primary">🍗 HealthyFit Login 🏋🏽‍♂️</Heading>
                 {error && <ErrorMessage className="mb-4 text-center">{error}</ErrorMessage>}
                 <form onSubmit={handleSubmit} className="space-y-6">
                     <Field>