feat: implement auth screens (login, register) and profile screen

frontend-mobile/app/(tabs)/profile.tsx

@@ -1,23 +1,219 @@
-import { View, Text, StyleSheet } from 'react-native';
+import React from 'react';
+import { View, Text, StyleSheet, TouchableOpacity, Alert } from 'react-native';
+import { useRouter } from 'expo-router';
+import { Ionicons } from '@expo/vector-icons';
+import { useAuth } from '../../hooks/useAuth';
+import { colors, spacing, borderRadius } from '../../constants/theme';
 
 export default function ProfileScreen() {
+  const router = useRouter();
+  const { user, isAuthenticated, isLoading, logout, isAdmin } = useAuth();
+
+  const handleLogout = async () => {
+    Alert.alert(
+      'Cerrar Sesión',
+      '¿Estás seguro que deseas cerrar sesión?',
+      [
+        { text: 'Cancelar', style: 'cancel' },
+        { 
+          text: 'Cerrar Sesión', 
+          style: 'destructive',
+          onPress: async () => {
+            await logout();
+            router.replace('/auth/login');
+          }
+        },
+      ]
+    );
+  };
+
+  if (isLoading) {
     return (
       <View style={styles.container}>
-      <Text style={styles.title}>Perfil</Text>
+        <Text style={styles.loadingText}>Cargando...</Text>
+      </View>
+    );
+  }
+
+  if (!isAuthenticated) {
+    return (
+      <View style={styles.container}>
+        <View style={styles.authPrompt}>
+          <Ionicons name="person-outline" size={64} color={colors.textSecondary} />
+          <Text style={styles.authTitle}>Inicia Sesión</Text>
+          <Text style={styles.authSubtitle}>
+            Inicia sesión para acceder a todas las funcionalidades
+          </Text>
+          <TouchableOpacity
+            style={styles.button}
+            onPress={() => router.push('/auth/login')}
+          >
+            <Text style={styles.buttonText}>Iniciar Sesión</Text>
+          </TouchableOpacity>
+          <TouchableOpacity
+            style={styles.linkButton}
+            onPress={() => router.push('/auth/register')}
+          >
+            <Text style={styles.linkText}>Crear cuenta nueva</Text>
+          </TouchableOpacity>
+        </View>
+      </View>
+    );
+  }
+
+  return (
+    <View style={styles.container}>
+      <View style={styles.header}>
+        <View style={styles.avatar}>
+          <Ionicons name="person" size={40} color={colors.primary} />
+        </View>
+        <Text style={styles.username}>{user?.username}</Text>
+        {isAdmin && <Text style={styles.adminBadge}>Administrador</Text>}
+      </View>
+
+      <View style={styles.menuSection}>
+        {isAdmin && (
+          <TouchableOpacity style={styles.menuItem}>
+            <Ionicons name="settings" size={24} color={colors.text} />
+            <Text style={styles.menuText}>Panel Admin</Text>
+            <Ionicons name="chevron-forward" size={20} color={colors.textSecondary} />
+          </TouchableOpacity>
+        )}
+        
+        <TouchableOpacity style={styles.menuItem}>
+          <Ionicons name="heart" size={24} color={colors.text} />
+          <Text style={styles.menuText}>Favoritos</Text>
+          <Ionicons name="chevron-forward" size={20} color={colors.textSecondary} />
+        </TouchableOpacity>
+        
+        <TouchableOpacity style={styles.menuItem}>
+          <Ionicons name="notifications" size={24} color={colors.text} />
+          <Text style={styles.menuText}>Notificaciones</Text>
+          <Ionicons name="chevron-forward" size={20} color={colors.textSecondary} />
+        </TouchableOpacity>
+        
+        <TouchableOpacity style={styles.menuItem}>
+          <Ionicons name="help-circle" size={24} color={colors.text} />
+          <Text style={styles.menuText}>Ayuda</Text>
+          <Ionicons name="chevron-forward" size={20} color={colors.textSecondary} />
+        </TouchableOpacity>
+      </View>
+
+      <TouchableOpacity style={styles.logoutButton} onPress={handleLogout}>
+        <Ionicons name="log-out" size={20} color={colors.danger} />
+        <Text style={styles.logoutText}>Cerrar Sesión</Text>
+      </TouchableOpacity>
     </View>
   );
 }
 
 const styles = StyleSheet.create({
   container: {
+    flex: 1,
+    backgroundColor: colors.background,
+  },
+  loadingText: {
+    textAlign: 'center',
+    marginTop: spacing.xxl,
+    color: colors.textSecondary,
+  },
+  authPrompt: {
     flex: 1,
     justifyContent: 'center',
     alignItems: 'center',
-    backgroundColor: '#F2F2F7',
+    padding: spacing.xl,
   },
-  title: {
+  authTitle: {
     fontSize: 24,
     fontWeight: 'bold',
-    color: '#1C1C1E',
+    color: colors.text,
+    marginTop: spacing.lg,
+  },
+  authSubtitle: {
+    fontSize: 16,
+    color: colors.textSecondary,
+    textAlign: 'center',
+    marginTop: spacing.sm,
+    marginBottom: spacing.xl,
+  },
+  header: {
+    alignItems: 'center',
+    padding: spacing.xl,
+    backgroundColor: colors.card,
+  },
+  avatar: {
+    width: 80,
+    height: 80,
+    borderRadius: 40,
+    backgroundColor: colors.background,
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  username: {
+    fontSize: 20,
+    fontWeight: 'bold',
+    color: colors.text,
+    marginTop: spacing.md,
+  },
+  adminBadge: {
+    fontSize: 12,
+    color: colors.primary,
+    backgroundColor: '#E3F2FD',
+    paddingHorizontal: spacing.sm,
+    paddingVertical: spacing.xs,
+    borderRadius: borderRadius.sm,
+    marginTop: spacing.sm,
+  },
+  menuSection: {
+    marginTop: spacing.md,
+    backgroundColor: colors.card,
+  },
+  menuItem: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    padding: spacing.md,
+    borderBottomWidth: 1,
+    borderBottomColor: colors.separator,
+  },
+  menuText: {
+    flex: 1,
+    marginLeft: spacing.md,
+    fontSize: 16,
+    color: colors.text,
+  },
+  button: {
+    backgroundColor: colors.primary,
+    borderRadius: borderRadius.md,
+    paddingVertical: spacing.md,
+    paddingHorizontal: spacing.xl,
+  },
+  buttonText: {
+    color: colors.textInverse,
+    fontSize: 16,
+    fontWeight: '600',
+  },
+  linkButton: {
+    marginTop: spacing.md,
+  },
+  linkText: {
+    color: colors.primary,
+    fontSize: 14,
+  },
+  logoutButton: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'center',
+    margin: spacing.xl,
+    padding: spacing.md,
+    backgroundColor: colors.card,
+    borderRadius: borderRadius.md,
+    borderWidth: 1,
+    borderColor: colors.danger,
+  },
+  logoutText: {
+    marginLeft: spacing.sm,
+    color: colors.danger,
+    fontSize: 16,
+    fontWeight: '500',
   },
 });

frontend-mobile/app/auth/login.tsx

@@ -0,0 +1,155 @@
+import React, { useState } from 'react';
+import { 
+  View, 
+  Text, 
+  TextInput, 
+  TouchableOpacity, 
+  StyleSheet, 
+  KeyboardAvoidingView,
+  Platform,
+  Alert
+} from 'react-native';
+import { useRouter } from 'expo-router';
+import { useAuthStore } from '../../store/authStore';
+import { colors, spacing, borderRadius } from '../../constants/theme';
+
+export default function LoginScreen() {
+  const router = useRouter();
+  const { login } = useAuthStore();
+  const [username, setUsername] = useState('');
+  const [password, setPassword] = useState('');
+  const [isLoading, setIsLoading] = useState(false);
+
+  const handleLogin = async () => {
+    if (!username || !password) {
+      Alert.alert('Error', 'Por favor ingresa usuario y contraseña');
+      return;
+    }
+
+    setIsLoading(true);
+    try {
+      await login(username, password);
+      router.replace('/(tabs)');
+    } catch (error) {
+      Alert.alert('Error', 'Credenciales incorrectas');
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <KeyboardAvoidingView
+      style={styles.container}
+      behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
+    >
+      <View style={styles.form}>
+        <Text style={styles.title}>Iniciar Sesión</Text>
+        <Text style={styles.subtitle}>Ingresa tus credenciales para continuar</Text>
+
+        <View style={styles.inputContainer}>
+          <Text style={styles.label}>Usuario</Text>
+          <TextInput
+            style={styles.input}
+            value={username}
+            onChangeText={setUsername}
+            placeholder="Tu usuario"
+            placeholderTextColor={colors.textSecondary}
+            autoCapitalize="none"
+            autoCorrect={false}
+          />
+        </View>
+
+        <View style={styles.inputContainer}>
+          <Text style={styles.label}>Contraseña</Text>
+          <TextInput
+            style={styles.input}
+            value={password}
+            onChangeText={setPassword}
+            placeholder="Tu contraseña"
+            placeholderTextColor={colors.textSecondary}
+            secureTextEntry
+          />
+        </View>
+
+        <TouchableOpacity
+          style={[styles.button, isLoading && styles.buttonDisabled]}
+          onPress={handleLogin}
+          disabled={isLoading}
+        >
+          <Text style={styles.buttonText}>
+            {isLoading ? 'Ingresando...' : 'Iniciar Sesión'}
+          </Text>
+        </TouchableOpacity>
+
+        <TouchableOpacity
+          style={styles.linkButton}
+          onPress={() => router.push('/auth/register')}
+        >
+          <Text style={styles.linkText}>¿No tienes cuenta? Regístrate</Text>
+        </TouchableOpacity>
+      </View>
+    </KeyboardAvoidingView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: colors.background,
+  },
+  form: {
+    flex: 1,
+    justifyContent: 'center',
+    padding: spacing.xl,
+  },
+  title: {
+    fontSize: 28,
+    fontWeight: 'bold',
+    color: colors.text,
+    marginBottom: spacing.sm,
+  },
+  subtitle: {
+    fontSize: 16,
+    color: colors.textSecondary,
+    marginBottom: spacing.xl,
+  },
+  inputContainer: {
+    marginBottom: spacing.md,
+  },
+  label: {
+    fontSize: 14,
+    fontWeight: '500',
+    color: colors.text,
+    marginBottom: spacing.xs,
+  },
+  input: {
+    backgroundColor: colors.card,
+    borderRadius: borderRadius.md,
+    padding: spacing.md,
+    fontSize: 16,
+    color: colors.text,
+  },
+  button: {
+    backgroundColor: colors.primary,
+    borderRadius: borderRadius.md,
+    padding: spacing.md,
+    alignItems: 'center',
+    marginTop: spacing.md,
+  },
+  buttonDisabled: {
+    opacity: 0.6,
+  },
+  buttonText: {
+    color: colors.textInverse,
+    fontSize: 16,
+    fontWeight: '600',
+  },
+  linkButton: {
+    marginTop: spacing.lg,
+    alignItems: 'center',
+  },
+  linkText: {
+    color: colors.primary,
+    fontSize: 14,
+  },
+});

frontend-mobile/app/auth/register.tsx

@@ -0,0 +1,172 @@
+import React, { useState } from 'react';
+import { 
+  View, 
+  Text, 
+  TextInput, 
+  TouchableOpacity, 
+  StyleSheet, 
+  KeyboardAvoidingView,
+  Platform,
+  Alert
+} from 'react-native';
+import { useRouter } from 'expo-router';
+import { register } from '../../services/auth';
+import { colors, spacing, borderRadius } from '../../constants/theme';
+
+export default function RegisterScreen() {
+  const router = useRouter();
+  const [username, setUsername] = useState('');
+  const [password, setPassword] = useState('');
+  const [confirmPassword, setConfirmPassword] = useState('');
+  const [isLoading, setIsLoading] = useState(false);
+
+  const handleRegister = async () => {
+    if (!username || !password || !confirmPassword) {
+      Alert.alert('Error', 'Por favor completa todos los campos');
+      return;
+    }
+
+    if (password !== confirmPassword) {
+      Alert.alert('Error', 'Las contraseñas no coinciden');
+      return;
+    }
+
+    setIsLoading(true);
+    try {
+      await register(username, password);
+      router.replace('/(tabs)');
+    } catch (error) {
+      Alert.alert('Error', 'No se pudo crear la cuenta');
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return (
+    <KeyboardAvoidingView
+      style={styles.container}
+      behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
+    >
+      <View style={styles.form}>
+        <Text style={styles.title}>Crear Cuenta</Text>
+        <Text style={styles.subtitle}>Regístrate para empezar</Text>
+
+        <View style={styles.inputContainer}>
+          <Text style={styles.label}>Usuario</Text>
+          <TextInput
+            style={styles.input}
+            value={username}
+            onChangeText={setUsername}
+            placeholder="Elige un usuario"
+            placeholderTextColor={colors.textSecondary}
+            autoCapitalize="none"
+            autoCorrect={false}
+          />
+        </View>
+
+        <View style={styles.inputContainer}>
+          <Text style={styles.label}>Contraseña</Text>
+          <TextInput
+            style={styles.input}
+            value={password}
+            onChangeText={setPassword}
+            placeholder="Elige una contraseña"
+            placeholderTextColor={colors.textSecondary}
+            secureTextEntry
+          />
+        </View>
+
+        <View style={styles.inputContainer}>
+          <Text style={styles.label}>Confirmar Contraseña</Text>
+          <TextInput
+            style={styles.input}
+            value={confirmPassword}
+            onChangeText={setConfirmPassword}
+            placeholder="Repite la contraseña"
+            placeholderTextColor={colors.textSecondary}
+            secureTextEntry
+          />
+        </View>
+
+        <TouchableOpacity
+          style={[styles.button, isLoading && styles.buttonDisabled]}
+          onPress={handleRegister}
+          disabled={isLoading}
+        >
+          <Text style={styles.buttonText}>
+            {isLoading ? 'Creando cuenta...' : 'Crear Cuenta'}
+          </Text>
+        </TouchableOpacity>
+
+        <TouchableOpacity
+          style={styles.linkButton}
+          onPress={() => router.back()}
+        >
+          <Text style={styles.linkText}>¿Ya tienes cuenta? Inicia sesión</Text>
+        </TouchableOpacity>
+      </View>
+    </KeyboardAvoidingView>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: colors.background,
+  },
+  form: {
+    flex: 1,
+    justifyContent: 'center',
+    padding: spacing.xl,
+  },
+  title: {
+    fontSize: 28,
+    fontWeight: 'bold',
+    color: colors.text,
+    marginBottom: spacing.sm,
+  },
+  subtitle: {
+    fontSize: 16,
+    color: colors.textSecondary,
+    marginBottom: spacing.xl,
+  },
+  inputContainer: {
+    marginBottom: spacing.md,
+  },
+  label: {
+    fontSize: 14,
+    fontWeight: '500',
+    color: colors.text,
+    marginBottom: spacing.xs,
+  },
+  input: {
+    backgroundColor: colors.card,
+    borderRadius: borderRadius.md,
+    padding: spacing.md,
+    fontSize: 16,
+    color: colors.text,
+  },
+  button: {
+    backgroundColor: colors.primary,
+    borderRadius: borderRadius.md,
+    padding: spacing.md,
+    alignItems: 'center',
+    marginTop: spacing.md,
+  },
+  buttonDisabled: {
+    opacity: 0.6,
+  },
+  buttonText: {
+    color: colors.textInverse,
+    fontSize: 16,
+    fontWeight: '600',
+  },
+  linkButton: {
+    marginTop: spacing.lg,
+    alignItems: 'center',
+  },
+  linkText: {
+    color: colors.primary,
+    fontSize: 14,
+  },
+});