Initial project scaffolding for health tracker app

Set up backend and frontend structure for a health and fitness tracker using Python (FastAPI, SQLModel, DSPy) and React. Includes Docker and Compose configs, authentication, nutrition AI module, health/nutrition/user endpoints, database models, and basic frontend with routing and context. Enables tracking nutrition, health metrics, and user management, with architecture ready for future mobile and cloud deployment.

frontend/src/pages/Login.jsx

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+import { useState, useContext } from 'react';
+import { AuthContext } from '../context/AuthContext';
+import { useNavigate } from 'react-router-dom';
+
+const Login = () => {
+    const { login } = useContext(AuthContext);
+    const [email, setEmail] = useState('');
+    const [password, setPassword] = useState('');
+    const [error, setError] = useState('');
+    const navigate = useNavigate();
+
+    const handleSubmit = async (e) => {
+        e.preventDefault();
+        try {
+            await login(email, password);
+            navigate('/');
+        } catch (err) {
+            setError('Invalid credentials');
+        }
+    };
+
+    return (
+        <div className="flex min-h-screen items-center justify-center bg-gray-900 text-white">
+            <div className="w-full max-w-md p-8 bg-gray-800 rounded-lg shadow-lg">
+                <h2 className="text-2xl font-bold mb-6 text-center text-purple-400">Healthy Fit Login</h2>
+                {error && <p className="text-red-500 mb-4">{error}</p>}
+                <form onSubmit={handleSubmit}>
+                    <div className="mb-4">
+                        <label className="block mb-2">Email</label>
+                        <input
+                            type="email"
+                            value={email}
+                            onChange={(e) => setEmail(e.target.value)}
+                            className="w-full p-2 rounded bg-gray-700 border border-gray-600 focus:outline-none focus:border-purple-500"
+                            required
+                        />
+                    </div>
+                    <div className="mb-6">
+                        <label className="block mb-2">Password</label>
+                        <input
+                            type="password"
+                            value={password}
+                            onChange={(e) => setPassword(e.target.value)}
+                            className="w-full p-2 rounded bg-gray-700 border border-gray-600 focus:outline-none focus:border-purple-500"
+                            required
+                        />
+                    </div>
+                    <button type="submit" className="w-full bg-purple-600 hover:bg-purple-700 text-white p-2 rounded font-bold transition">
+                        Login
+                    </button>
+                </form>
+            </div>
+        </div>
+    );
+};
+
+export default Login;