added required code changes, components, and packages for login feature

frontend/src/components/LoginForm.js

@@ -0,0 +1,107 @@
+import React, { useState } from 'react';
+import { Loader, AlertCircle, Lock, User } from 'lucide-react';
+import { useAuth } from '../contexts/AuthContext';
+
+export default function LoginForm() {
+    const [username, setUsername] = useState('');
+    const [password, setPassword] = useState('');
+    const [loading, setLoading] = useState(false);
+    const [error, setError] = useState('');
+    const { login } = useAuth();
+
+    const handleSubmit = async (e) => {
+        e.preventDefault();
+        setError('');
+        setLoading(true);
+
+        const result = await login(username, password);
+
+        if (!result.success) {
+            setError(result.error);
+        }
+
+        setLoading(false);
+    };
+
+    return (
+        <div className="min-h-screen bg-gray-100 flex items-center justify-center p-4">
+            <div className="bg-white rounded-lg shadow-xl max-w-md w-full p-8">
+                <div className="text-center mb-8">
+                    <div className="w-16 h-16 bg-[#0476D9] rounded-full flex items-center justify-center mx-auto mb-4">
+                        <Lock className="w-8 h-8 text-white" />
+                    </div>
+                    <h1 className="text-2xl font-bold text-gray-900">CVE Dashboard</h1>
+                    <p className="text-gray-600 mt-2">Sign in to access the dashboard</p>
+                </div>
+
+                {error && (
+                    <div className="mb-6 p-4 bg-red-50 border border-red-200 rounded-lg flex items-start gap-3">
+                        <AlertCircle className="w-5 h-5 text-red-600 flex-shrink-0 mt-0.5" />
+                        <p className="text-sm text-red-700">{error}</p>
+                    </div>
+                )}
+
+                <form onSubmit={handleSubmit} className="space-y-6">
+                    <div>
+                        <label htmlFor="username" className="block text-sm font-medium text-gray-700 mb-2">
+                            Username
+                        </label>
+                        <div className="relative">
+                            <User className="w-5 h-5 text-gray-400 absolute left-3 top-1/2 transform -translate-y-1/2" />
+                            <input
+                                id="username"
+                                type="text"
+                                required
+                                value={username}
+                                onChange={(e) => setUsername(e.target.value)}
+                                className="w-full pl-10 pr-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-[#0476D9] focus:border-transparent"
+                                placeholder="Enter your username"
+                                disabled={loading}
+                            />
+                        </div>
+                    </div>
+
+                    <div>
+                        <label htmlFor="password" className="block text-sm font-medium text-gray-700 mb-2">
+                            Password
+                        </label>
+                        <div className="relative">
+                            <Lock className="w-5 h-5 text-gray-400 absolute left-3 top-1/2 transform -translate-y-1/2" />
+                            <input
+                                id="password"
+                                type="password"
+                                required
+                                value={password}
+                                onChange={(e) => setPassword(e.target.value)}
+                                className="w-full pl-10 pr-4 py-3 border border-gray-300 rounded-lg focus:ring-2 focus:ring-[#0476D9] focus:border-transparent"
+                                placeholder="Enter your password"
+                                disabled={loading}
+                            />
+                        </div>
+                    </div>
+
+                    <button
+                        type="submit"
+                        disabled={loading}
+                        className="w-full py-3 bg-[#0476D9] text-white rounded-lg hover:bg-[#0360B8] transition-colors font-medium shadow-md disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
+                    >
+                        {loading ? (
+                            <>
+                                <Loader className="w-5 h-5 animate-spin" />
+                                Signing in...
+                            </>
+                        ) : (
+                            'Sign In'
+                        )}
+                    </button>
+                </form>
+
+                <div className="mt-6 pt-6 border-t border-gray-200">
+                    <p className="text-sm text-gray-500 text-center">
+                        Default admin credentials: admin / admin123
+                    </p>
+                </div>
+            </div>
+        </div>
+    );
+}