Fin de aplicación

README.md

@@ -0,0 +1,51 @@
+# Despensapp - Gestión de Despensa Familiar
+
+Aplicación Android diseñada para gestionar el inventario de una despensa de forma compartida, con integración directa a MariaDB y Open Food Facts.
+
+## Funcionalidades Actuales
+
+### 🔐 Autenticación Multiusuario
+*   **Login y Registro:** Conexión directa a una base de datos MariaDB externa (`mariadb.peta9.com`).
+*   **Gestión de Cuentas:** Registro de usuarios con nombre completo, email y contraseña.
+*   **Seguridad:** Uso de hilos secundarios (Coroutines) para no bloquear la interfaz durante la conexión.
+
+### 🍱 Gestión de Inventario
+*   **Visualización en Tiempo Real:** Lista de productos traída directamente desde MariaDB con soporte para unidades (kg, l, gr, etc.).
+*   **Imágenes de Productos:** Integración con **Coil** para mostrar las imágenes de los productos obtenidas de Open Food Facts.
+*   **Detalles Extendidos:** Pantalla de detalles para cada producto con información técnica de MariaDB.
+*   **Búsqueda y Categorización:** Filtro por nombre y categorías dinámicas para una localización rápida.
+*   **Swipe to Delete:** Borrado intuitivo de productos deslizando hacia la izquierda (Material 3).
+*   **Fecha de Caducidad:** Seguimiento de la caducidad de cada producto para evitar desperdicios.
+*   **Filtro Inteligente:** Filtro para ver rápidamente qué productos han caducado o están a punto de hacerlo (7 días o menos).
+*   **Formato de Fecha:** Visualización de fechas en formato amigable (DD/MM/YYYY) en toda la aplicación.
+*   **Lista de la Compra:** Modo dedicado que muestra únicamente los productos con stock bajo.
+*   **Historial de Alta:** Registro automático de la fecha y hora en la que se añadió cada producto.
+*   **Alertas de Stock Bajo:** Indicadores visuales en rojo cuando un producto está por debajo de su cantidad mínima.
+*   **Notificaciones Automáticas:** El sistema revisa diariamente el inventario y envía notificaciones al móvil sobre stock bajo.
+*   **Control Rápido:** Botones de incremento/decremento en la pantalla principal para actualizar el stock rápidamente.
+*   **Edición Completa:** Modo de edición total en la pantalla de detalle para modificar nombre, stock, stock mínimo, categoría y caducidad.
+*   **Compartir Lista:** Botón para compartir la lista de la compra directamente desde la aplicación a servicios de mensajería (WhatsApp, etc.).
+*   **Iconografía Dinámica:** Asignación inteligente de iconos de Material Design basados en la categoría del producto (Lácteos, Carnicería, Fresco, etc.).
+*   **Cierre de Sesión:** Opción para cerrar la sesión actual y volver de forma segura a la pantalla de bienvenida.
+
+### 🎨 Identidad Visual
+*   **Icono Personalizado:** Diseño de icono adaptativo único que representa un mueble de despensa lleno de productos.
+*   **Interfaz Material 3:** Uso de los últimos estándares de diseño de Google para una experiencia fluida y moderna.
+*   **Colores Amigables:** Paleta de colores personalizada para mejorar la legibilidad y la estética familiar.
+
+### 🔍 Integración con APIs y Hardware
+*   **Escáner de Código de Barras:** Uso de **CameraX** y **Google ML Kit** con **Feedback Háptico** (vibración) al detectar productos.
+*   **Linterna:** Botón integrado en el escáner para encender y apagar el flash en entornos oscuros.
+*   **Open Food Facts:** Búsqueda automática de nombres, categorías e imágenes al escanear un código de barras.
+*   **MariaDB Directo:** Conexión JDBC para persistencia de datos compartida.
+
+## Próximos Pasos
+*   [x] Gestión de fechas de caducidad.
+*   [x] Lista de la compra automática basada en el stock bajo.
+*   [ ] Compartir despensas específicas mediante códigos de familia.
+*   [ ] Exportar inventario a PDF/CSV.
+
+## Requisitos Técnicos
+*   Android SDK 34+
+*   Conexión a Internet (para API y DB remota).
+*   Permiso de Cámara (para el escáner).

app/build.gradle.kts

@@ -39,6 +39,20 @@ dependencies {
     implementation(platform(libs.androidx.compose.bom))
     implementation(libs.androidx.activity.compose)
     implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.navigation.compose)
+    implementation(libs.retrofit)
+    implementation(libs.retrofit.gson)
+    implementation(libs.okhttp)
+    implementation(libs.okhttp.logging)
+    implementation(libs.mariadb.java.client)
+    implementation(libs.androidx.camera.camera2)
+    implementation(libs.androidx.camera.lifecycle)
+    implementation(libs.androidx.camera.view)
+    implementation(libs.barcode.scanning)
+    implementation(libs.coil.compose)
+    implementation(libs.androidx.work.runtime)
+    implementation(libs.androidx.work.runtime)
+    implementation(libs.material.icons.extended)
     implementation(libs.androidx.compose.ui)
     implementation(libs.androidx.compose.ui.graphics)
     implementation(libs.androidx.compose.ui.tooling.preview)

app/src/main/AndroidManifest.xml

@@ -2,6 +2,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.VIBRATE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-feature android:name="android.hardware.camera" android:required="false" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"

app/src/main/java/com/example/despensapp/MainActivity.kt

@@ -4,44 +4,28 @@ import android.os.Bundle
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
-import androidx.compose.foundation.layout.fillMaxSize
+import androidx.navigation.compose.rememberNavController
-import androidx.compose.foundation.layout.padding
+import androidx.work.PeriodicWorkRequestBuilder
-import androidx.compose.material3.Scaffold
+import androidx.work.WorkManager
-import androidx.compose.material3.Text
+import com.example.despensapp.ui.navigation.NavGraph
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.tooling.preview.Preview
 import com.example.despensapp.ui.theme.DespensappTheme
+import com.example.despensapp.worker.InventoryCheckWorker
+import java.util.concurrent.TimeUnit
 
 class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         enableEdgeToEdge()
+        
+        // Programar revisión de inventario cada 24 horas
+        val workRequest = PeriodicWorkRequestBuilder<InventoryCheckWorker>(24, TimeUnit.HOURS).build()
+        WorkManager.getInstance(this).enqueue(workRequest)
+
         setContent {
             DespensappTheme {
-                Scaffold(modifier = Modifier.fillMaxSize()) { innerPadding ->
+                val navController = rememberNavController()
-                    Greeting(
+                NavGraph(navController = navController)
-                        name = "Android",
-                        modifier = Modifier.padding(innerPadding)
-                    )
             }
         }
     }
 }
-}
-
-@Composable
-fun Greeting(name: String, modifier: Modifier = Modifier) {
-    Text(
-        text = "Hello $name!",
-        modifier = modifier
-    )
-}
-
-@Preview(showBackground = true)
-@Composable
-fun GreetingPreview() {
-    DespensappTheme {
-        Greeting("Android")
-    }
-}

app/src/main/java/com/example/despensapp/data/api/OpenFoodFactsApi.kt

@@ -0,0 +1,12 @@
+package com.example.despensapp.data.api
+
+import com.example.despensapp.data.model.off.OFFProductResponse
+import retrofit2.http.GET
+import retrofit2.http.Path
+
+interface OpenFoodFactsApi {
+    @GET("api/v0/product/{barcode}.json")
+    suspend fun getProductByBarcode(
+        @Path("barcode") barcode: String
+    ): OFFProductResponse
+}

app/src/main/java/com/example/despensapp/data/model/Product.kt

@@ -0,0 +1,15 @@
+package com.example.despensapp.data.model
+
+data class Product(
+    val id: Int = 0,
+    val name: String,
+    val quantity: Int,
+    val minQuantity: Int,
+    val unit: String = "unidades",
+    val category: String = "General",
+    val imageUrl: String? = null,
+    val expirationDate: String? = null,
+    val createdAt: String? = null
+) {
+    val isLowStock: Boolean get() = quantity <= minQuantity
+}

app/src/main/java/com/example/despensapp/data/model/off/OFFProductResponse.kt

@@ -0,0 +1,19 @@
+package com.example.despensapp.data.model.off
+
+import com.google.gson.annotations.SerializedName
+
+data class OFFProductResponse(
+    val status: Int,
+    val code: String,
+    val product: OFFProduct?
+)
+
+data class OFFProduct(
+    @SerializedName("product_name") val productName: String?,
+    @SerializedName("product_name_es") val productNameEs: String?,
+    val brands: String?,
+    val categories: String?,
+    @SerializedName("image_url") val imageUrl: String?
+) {
+    val displayName: String get() = productNameEs ?: productName ?: "Producto desconocido"
+}

app/src/main/java/com/example/despensapp/data/repository/PantryRepository.kt

@@ -0,0 +1,204 @@
+package com.example.despensapp.data.repository
+
+import com.example.despensapp.data.api.OpenFoodFactsApi
+import com.example.despensapp.data.model.Product
+import com.example.despensapp.data.model.off.OFFProduct
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import retrofit2.Retrofit
+import retrofit2.converter.gson.GsonConverterFactory
+import java.sql.DriverManager
+import java.sql.SQLException
+
+class PantryRepository {
+    private val dbUrl = "jdbc:mariadb://mariadb.peta9.com:3306/despensa_db"
+    private val dbUser = "despensa_dba"
+    private val dbPassword = "Pedro@110387"
+
+    private val offApi = Retrofit.Builder()
+        .baseUrl("https://es.openfoodfacts.org/")
+        .addConverterFactory(GsonConverterFactory.create())
+        .build()
+        .create(OpenFoodFactsApi::class.java)
+
+    suspend fun getProductFromOFF(barcode: String): Result<OFFProduct?> {
+        return try {
+            val response = offApi.getProductByBarcode(barcode)
+            if (response.status == 1) {
+                Result.success(response.product)
+            } else {
+                Result.failure(Exception("Producto no encontrado en Open Food Facts"))
+            }
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+
+    suspend fun getAllProductsFromDb(): Result<List<Product>> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+                val sql = "SELECT * FROM productos"
+                val statement = connection.prepareStatement(sql)
+                val resultSet = statement.executeQuery()
+                
+                val products = mutableListOf<Product>()
+                while (resultSet.next()) {
+                    products.add(
+                        Product(
+                            id = resultSet.getInt("id"),
+                            name = resultSet.getString("nombre"),
+                            quantity = resultSet.getInt("cantidad"),
+                            minQuantity = resultSet.getInt("cantidad_minima"),
+                            unit = resultSet.getString("unidad") ?: "unidades",
+                            category = resultSet.getString("categoria"),
+                            imageUrl = resultSet.getString("imagen_url"),
+                            expirationDate = resultSet.getString("fecha_caducidad"),
+                            createdAt = resultSet.getString("fecha_alta")
+                        )
+                    )
+                }
+                connection.close()
+                Result.success(products)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+
+    suspend fun updateProductQuantity(productId: Int, newQuantity: Int): Result<Boolean> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+                val sql = "UPDATE productos SET cantidad = ? WHERE id = ?"
+                val statement = connection.prepareStatement(sql)
+                statement.setInt(1, newQuantity)
+                statement.setInt(2, productId)
+                
+                val rowsUpdated = statement.executeUpdate()
+                connection.close()
+                Result.success(rowsUpdated > 0)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+
+    suspend fun updateProductFull(
+        productId: Int,
+        nombre: String,
+        cantidad: Int,
+        minCantidad: Int,
+        unidad: String,
+        categoria: String,
+        fechaCaducidad: String?
+    ): Result<Boolean> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+                val sql = "UPDATE productos SET nombre = ?, cantidad = ?, cantidad_minima = ?, unidad = ?, categoria = ?, fecha_caducidad = ? WHERE id = ?"
+                val statement = connection.prepareStatement(sql)
+                statement.setString(1, nombre)
+                statement.setInt(2, cantidad)
+                statement.setInt(3, minCantidad)
+                statement.setString(4, unidad)
+                statement.setString(5, categoria)
+                statement.setString(6, fechaCaducidad)
+                statement.setInt(7, productId)
+
+                val rowsUpdated = statement.executeUpdate()
+                connection.close()
+                Result.success(rowsUpdated > 0)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+
+    suspend fun addProduct(
+        barcode: String, 
+        nombre: String, 
+        cantidad: Int, 
+        minCantidad: Int,
+        unidad: String,
+        categoria: String, 
+        imageUrl: String?,
+        fechaCaducidad: String?
+    ): Result<Boolean> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+                val sql = "INSERT INTO productos (barcode, nombre, cantidad, cantidad_minima, unidad, categoria, imagen_url, fecha_caducidad) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
+                val statement = connection.prepareStatement(sql)
+                statement.setString(1, barcode)
+                statement.setString(2, nombre)
+                statement.setInt(3, cantidad)
+                statement.setInt(4, minCantidad)
+                statement.setString(5, unidad)
+                statement.setString(6, categoria)
+                statement.setString(7, imageUrl)
+                statement.setString(8, fechaCaducidad)
+                
+                val rowsInserted = statement.executeUpdate()
+                connection.close()
+                Result.success(rowsInserted > 0)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+
+    suspend fun deleteProduct(productId: Int): Result<Boolean> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+                val sql = "DELETE FROM productos WHERE id = ?"
+                val statement = connection.prepareStatement(sql)
+                statement.setInt(1, productId)
+                
+                val rowsDeleted = statement.executeUpdate()
+                connection.close()
+                Result.success(rowsDeleted > 0)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+
+    suspend fun getProductById(productId: Int): Result<Product?> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(dbUrl, dbUser, dbPassword)
+                val sql = "SELECT * FROM productos WHERE id = ?"
+                val statement = connection.prepareStatement(sql)
+                statement.setInt(1, productId)
+                val resultSet = statement.executeQuery()
+                
+                var product: Product? = null
+                if (resultSet.next()) {
+                    product = Product(
+                        id = resultSet.getInt("id"),
+                        name = resultSet.getString("nombre"),
+                        quantity = resultSet.getInt("cantidad"),
+                        minQuantity = resultSet.getInt("cantidad_minima"),
+                        unit = resultSet.getString("unidad") ?: "unidades",
+                        category = resultSet.getString("categoria"),
+                        imageUrl = resultSet.getString("imagen_url"),
+                        expirationDate = resultSet.getString("fecha_caducidad"),
+                        createdAt = resultSet.getString("fecha_alta")
+                    )
+                }
+                connection.close()
+                Result.success(product)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+}

app/src/main/java/com/example/despensapp/data/repository/UserRepository.kt

@@ -0,0 +1,66 @@
+package com.example.despensapp.data.repository
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.sql.DriverManager
+import java.sql.SQLException
+
+class UserRepository {
+    private val url = "jdbc:mariadb://mariadb.peta9.com:3306/despensa_db"
+    private val user = "despensa_dba"
+    private val password = "Pedro@110387"
+
+    suspend fun registerUser(nombre: String, email: String, contrasena: String): Result<Boolean> {
+        return withContext(Dispatchers.IO) {
+            try {
+                // Forzar carga del driver
+                Class.forName("org.mariadb.jdbc.Driver")
+                
+                val connection = DriverManager.getConnection(url, user, password)
+                val sql = "INSERT INTO usuarios (nombre_completo, email, contrasena) VALUES (?, ?, ?)"
+                val statement = connection.prepareStatement(sql)
+                statement.setString(1, nombre)
+                statement.setString(2, email)
+                statement.setString(3, contrasena)
+                
+                val rowsInserted = statement.executeUpdate()
+                connection.close()
+                
+                if (rowsInserted > 0) {
+                    Result.success(true)
+                } else {
+                    Result.failure(Exception("No se pudo insertar el usuario"))
+                }
+            } catch (e: SQLException) {
+                Result.failure(e)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+
+    suspend fun loginUser(email: String, contrasena: String): Result<Boolean> {
+        return withContext(Dispatchers.IO) {
+            try {
+                Class.forName("org.mariadb.jdbc.Driver")
+                val connection = DriverManager.getConnection(url, user, password)
+                val sql = "SELECT * FROM usuarios WHERE email = ? AND contrasena = ?"
+                val statement = connection.prepareStatement(sql)
+                statement.setString(1, email)
+                statement.setString(2, contrasena)
+                
+                val resultSet = statement.executeQuery()
+                val exists = resultSet.next()
+                connection.close()
+                
+                if (exists) {
+                    Result.success(true)
+                } else {
+                    Result.failure(Exception("Credenciales incorrectas"))
+                }
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+    }
+}

app/src/main/java/com/example/despensapp/ui/navigation/NavGraph.kt

@@ -0,0 +1,86 @@
+package com.example.despensapp.ui.navigation
+
+import androidx.compose.runtime.Composable
+import androidx.navigation.NavHostController
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import com.example.despensapp.ui.screens.LoginScreen
+import com.example.despensapp.ui.screens.PantryScreen
+import com.example.despensapp.ui.screens.RegisterScreen
+import com.example.despensapp.ui.screens.AddProductScreen
+import com.example.despensapp.ui.screens.ProductDetailScreen
+import androidx.navigation.NavType
+import androidx.navigation.navArgument
+
+sealed class Screen(val route: String) {
+    object Login : Screen("login")
+    object Register : Screen("register")
+    object Pantry : Screen("pantry")
+    object AddProduct : Screen("add_product")
+    object ProductDetail : Screen("product_detail/{productId}") {
+        fun createRoute(productId: Int) = "product_detail/$productId"
+    }
+}
+
+@Composable
+fun NavGraph(navController: NavHostController) {
+    NavHost(
+        navController = navController,
+        startDestination = Screen.Login.route
+    ) {
+        composable(Screen.Login.route) {
+            LoginScreen(
+                onLoginSuccess = {
+                    navController.navigate(Screen.Pantry.route) {
+                        popUpTo(Screen.Login.route) { inclusive = true }
+                    }
+                },
+                onNavigateToRegister = {
+                    navController.navigate(Screen.Register.route)
+                }
+            )
+        }
+        composable(Screen.Register.route) {
+            RegisterScreen(
+                onRegisterSuccess = {
+                    navController.navigate(Screen.Pantry.route) {
+                        popUpTo(Screen.Login.route) { inclusive = true }
+                    }
+                },
+                onNavigateToLogin = {
+                    navController.popBackStack()
+                }
+            )
+        }
+        composable(Screen.Pantry.route) {
+            PantryScreen(
+                onNavigateToAdd = {
+                    navController.navigate(Screen.AddProduct.route)
+                },
+                onNavigateToDetail = { productId ->
+                    navController.navigate(Screen.ProductDetail.createRoute(productId))
+                },
+                onLogout = {
+                    navController.navigate(Screen.Login.route) {
+                        popUpTo(Screen.Pantry.route) { inclusive = true }
+                    }
+                }
+            )
+        }
+        composable(Screen.AddProduct.route) {
+            AddProductScreen(onProductAdded = {
+                navController.popBackStack()
+            })
+        }
+        composable(
+            route = Screen.ProductDetail.route,
+            arguments = listOf(navArgument("productId") { type = NavType.IntType })
+        ) { backStackEntry ->
+            val productId = backStackEntry.arguments?.getInt("productId") ?: 0
+            ProductDetailScreen(
+                productId = productId,
+                onBack = { navController.popBackStack() }
+            )
+        }
+    }
+}

app/src/main/java/com/example/despensapp/ui/screens/AddProductScreen.kt

@@ -0,0 +1,308 @@
+package com.example.despensapp.ui.screens
+
+import android.Manifest
+import android.app.DatePickerDialog
+import android.content.Context
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.os.VibratorManager
+import android.util.Log
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.camera.core.*
+import androidx.camera.lifecycle.ProcessCameraProvider
+import androidx.camera.view.PreviewView
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalLifecycleOwner
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import androidx.core.content.ContextCompat
+import com.example.despensapp.R
+import com.example.despensapp.data.repository.PantryRepository
+import com.example.despensapp.util.DateUtils
+import com.google.mlkit.vision.barcode.BarcodeScanning
+import com.google.mlkit.vision.common.InputImage
+import kotlinx.coroutines.launch
+import java.util.*
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun AddProductScreen(onProductAdded: () -> Unit) {
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+    val repository = remember { PantryRepository() }
+
+    var hasCameraPermission by remember {
+        mutableStateOf(
+            ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED
+        )
+    }
+
+    val launcher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.RequestPermission(),
+        onResult = { granted -> hasCameraPermission = granted }
+    )
+
+    LaunchedEffect(Unit) {
+        if (!hasCameraPermission) {
+            launcher.launch(Manifest.permission.CAMERA)
+        }
+    }
+
+    var scannedBarcode by remember { mutableStateOf<String?>(null) }
+    var productName by remember { mutableStateOf("") }
+    var productCategory by remember { mutableStateOf("General") }
+    var productImageUrl by remember { mutableStateOf<String?>(null) }
+    var expirationDate by remember { mutableStateOf<String?>(null) }
+    var quantity by remember { mutableStateOf(1) }
+    var minQuantity by remember { mutableStateOf(1) }
+    var selectedUnit by remember { mutableStateOf("unidades") }
+    var isLoading by remember { mutableStateOf(false) }
+    
+    var torchEnabled by remember { mutableStateOf(false) }
+
+    val units = listOf("unidades", "kg", "gr", "l", "ml", "paquetes")
+    var unitsExpanded by remember { mutableStateOf(false) }
+
+    val calendar = Calendar.getInstance()
+    val datePickerDialog = DatePickerDialog(
+        context,
+        { _, year, month, dayOfMonth ->
+            expirationDate = "$year-${month + 1}-$dayOfMonth"
+        },
+        calendar.get(Calendar.YEAR),
+        calendar.get(Calendar.MONTH),
+        calendar.get(Calendar.DAY_OF_MONTH)
+    )
+
+    fun triggerVibration() {
+        val vibrator = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
+            vibratorManager.defaultVibrator
+        } else {
+            @Suppress("DEPRECATION")
+            context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+        }
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            vibrator.vibrate(VibrationEffect.createOneShot(100, VibrationEffect.DEFAULT_AMPLITUDE))
+        } else {
+            @Suppress("DEPRECATION")
+            vibrator.vibrate(100)
+        }
+    }
+
+    Column(modifier = Modifier.fillMaxSize().padding(16.dp)) {
+        if (hasCameraPermission && scannedBarcode == null) {
+            Box(modifier = Modifier.fillMaxWidth().height(300.dp)) {
+                BarcodeScannerView(
+                    torchEnabled = torchEnabled,
+                    onBarcodeScanned = { barcode ->
+                        triggerVibration()
+                        scannedBarcode = barcode
+                        scope.launch {
+                            isLoading = true
+                            repository.getProductFromOFF(barcode).onSuccess { offProduct ->
+                                productName = offProduct?.displayName ?: "Desconocido"
+                                productCategory = offProduct?.categories?.split(",")?.firstOrNull() ?: "General"
+                                productImageUrl = offProduct?.imageUrl
+                                isLoading = false
+                            }.onFailure {
+                                isLoading = false
+                            }
+                        }
+                    }
+                )
+                
+                // Botón de Linterna
+                IconButton(
+                    onClick = { torchEnabled = !torchEnabled },
+                    modifier = Modifier.align(Alignment.TopEnd).padding(8.dp),
+                    colors = IconButtonDefaults.iconButtonColors(containerColor = Color.Black.copy(alpha = 0.5f))
+                ) {
+                    Icon(
+                        if (torchEnabled) Icons.Default.FlashOn else Icons.Default.FlashOff,
+                        contentDescription = stringResource(if (torchEnabled) R.string.flash_off else R.string.flash_on),
+                        tint = if (torchEnabled) Color.Yellow else Color.White
+                    )
+                }
+            }
+        }
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        if (scannedBarcode != null) {
+            Text(stringResource(R.string.add_product_barcode_detected, scannedBarcode!!), style = MaterialTheme.typography.titleMedium)
+            
+            OutlinedTextField(
+                value = productName,
+                onValueChange = { productName = it },
+                label = { Text(stringResource(R.string.add_product_name_label)) },
+                modifier = Modifier.fillMaxWidth()
+            )
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            // Selector de Unidad
+            ExposedDropdownMenuBox(
+                expanded = unitsExpanded,
+                onExpandedChange = { unitsExpanded = !unitsExpanded },
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                OutlinedTextField(
+                    value = selectedUnit,
+                    onValueChange = {},
+                    readOnly = true,
+                    label = { Text(stringResource(R.string.add_product_unit_label)) },
+                    trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = unitsExpanded) },
+                    modifier = Modifier.menuAnchor().fillMaxWidth(),
+                    colors = ExposedDropdownMenuDefaults.outlinedTextFieldColors()
+                )
+                ExposedDropdownMenu(
+                    expanded = unitsExpanded,
+                    onDismissRequest = { unitsExpanded = false }
+                ) {
+                    units.forEach { unit ->
+                        DropdownMenuItem(
+                            text = { Text(unit) },
+                            onClick = {
+                                selectedUnit = unit
+                                unitsExpanded = false
+                            }
+                        )
+                    }
+                }
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            // Selector de Fecha
+            OutlinedButton(
+                onClick = { datePickerDialog.show() },
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Icon(Icons.Default.CalendarToday, contentDescription = null)
+                Spacer(modifier = Modifier.width(8.dp))
+                Text(if (expirationDate == null) stringResource(R.string.add_product_expiry_button_empty) 
+                     else stringResource(R.string.add_product_expiry_button_date, DateUtils.formatToDisplay(expirationDate) ?: ""))
+            }
+
+            Spacer(modifier = Modifier.height(8.dp))
+
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Text(stringResource(R.string.add_product_quantity_label, quantity), modifier = Modifier.weight(1f))
+                IconButton(onClick = { if (quantity > 1) quantity-- }) {
+                    Icon(Icons.Default.Remove, stringResource(R.string.add_product_less))
+                }
+                IconButton(onClick = { quantity++ }) {
+                    Icon(Icons.Default.Add, stringResource(R.string.add_product_more))
+                }
+            }
+
+            if (isLoading) {
+                CircularProgressIndicator(modifier = Modifier.align(Alignment.CenterHorizontally))
+            } else {
+                Button(
+                    onClick = {
+                        scope.launch {
+                            isLoading = true
+                            val success = repository.addProduct(
+                                barcode = scannedBarcode!!,
+                                nombre = productName,
+                                cantidad = quantity,
+                                minCantidad = minQuantity,
+                                unidad = selectedUnit,
+                                categoria = productCategory,
+                                imageUrl = productImageUrl,
+                                fechaCaducidad = expirationDate
+                            )
+                            isLoading = false
+                            if (success.isSuccess) onProductAdded()
+                        }
+                    },
+                    modifier = Modifier.fillMaxWidth().padding(top = 16.dp)
+                ) {
+                    Text(stringResource(R.string.add_product_save_button))
+                }
+            }
+            
+            TextButton(onClick = { scannedBarcode = null }, modifier = Modifier.align(Alignment.CenterHorizontally)) {
+                Text(stringResource(R.string.add_product_scan_another))
+            }
+        } else if (!hasCameraPermission) {
+            Text(stringResource(R.string.add_product_camera_permission_required))
+        }
+    }
+}
+
+@Composable
+fun BarcodeScannerView(torchEnabled: Boolean, onBarcodeScanned: (String) -> Unit) {
+    val context = LocalContext.current
+    val lifecycleOwner = LocalLifecycleOwner.current
+    val cameraProviderFuture = remember { ProcessCameraProvider.getInstance(context) }
+    
+    var camera by remember { mutableStateOf<Camera?>(null) }
+
+    LaunchedEffect(torchEnabled) {
+        camera?.cameraControl?.enableTorch(torchEnabled)
+    }
+
+    AndroidView(
+        factory = { ctx ->
+            val previewView = PreviewView(ctx)
+            val executor = ContextCompat.getMainExecutor(ctx)
+            cameraProviderFuture.addListener({
+                val cameraProvider = cameraProviderFuture.get()
+                val preview = Preview.Builder().build().also {
+                    it.setSurfaceProvider(previewView.surfaceProvider)
+                }
+
+                val imageAnalysis = ImageAnalysis.Builder()
+                    .setBackpressureStrategy(ImageAnalysis.STRATEGY_KEEP_ONLY_LATEST)
+                    .build()
+
+                val scanner = BarcodeScanning.getClient()
+
+                @androidx.camera.core.ExperimentalGetImage
+                imageAnalysis.setAnalyzer(executor) { imageProxy ->
+                    val mediaImage = imageProxy.image
+                    if (mediaImage != null) {
+                        val image = InputImage.fromMediaImage(mediaImage, imageProxy.imageInfo.rotationDegrees)
+                        scanner.process(image)
+                            .addOnSuccessListener { barcodes ->
+                                for (barcode in barcodes) {
+                                    barcode.rawValue?.let { 
+                                        onBarcodeScanned(it)
+                                        cameraProvider.unbindAll() // Parar cámara al detectar
+                                    }
+                                }
+                            }
+                            .addOnCompleteListener { imageProxy.close() }
+                    }
+                }
+
+                val cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
+                try {
+                    cameraProvider.unbindAll()
+                    camera = cameraProvider.bindToLifecycle(lifecycleOwner, cameraSelector, preview, imageAnalysis)
+                    camera?.cameraControl?.enableTorch(torchEnabled)
+                } catch (e: Exception) {
+                    Log.e("Camera", "Use case binding failed", e)
+                }
+            }, executor)
+            previewView
+        },
+        modifier = Modifier.fillMaxSize()
+    )
+}

app/src/main/java/com/example/despensapp/ui/screens/LoginScreen.kt

@@ -0,0 +1,111 @@
+package com.example.despensapp.ui.screens
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import com.example.despensapp.R
+import com.example.despensapp.data.repository.UserRepository
+import com.example.despensapp.ui.theme.DespensappTheme
+import kotlinx.coroutines.launch
+
+@Composable
+fun LoginScreen(onLoginSuccess: () -> Unit, onNavigateToRegister: () -> Unit) {
+    val context = LocalContext.current
+    val repository = remember { UserRepository() }
+    val scope = rememberCoroutineScope()
+    
+    var email by remember { mutableStateOf("") }
+    var password by remember { mutableStateOf("") }
+    
+    var isLoading by remember { mutableStateOf(false) }
+    var errorMessage by remember { mutableStateOf<String?>(null) }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = stringResource(R.string.login_welcome),
+            fontSize = 24.sp,
+            fontWeight = FontWeight.Bold,
+            color = MaterialTheme.colorScheme.primary
+        )
+        
+        Spacer(modifier = Modifier.height(32.dp))
+
+        if (errorMessage != null) {
+            Text(text = errorMessage!!, color = MaterialTheme.colorScheme.error)
+            Spacer(modifier = Modifier.height(16.dp))
+        }
+
+        OutlinedTextField(
+            value = email,
+            onValueChange = { email = it },
+            label = { Text(stringResource(R.string.login_email_label)) },
+            modifier = Modifier.fillMaxWidth(),
+            enabled = !isLoading
+        )
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        OutlinedTextField(
+            value = password,
+            onValueChange = { password = it },
+            label = { Text(stringResource(R.string.login_password_label)) },
+            visualTransformation = PasswordVisualTransformation(),
+            modifier = Modifier.fillMaxWidth(),
+            enabled = !isLoading
+        )
+
+        Spacer(modifier = Modifier.height(24.dp))
+
+        if (isLoading) {
+            CircularProgressIndicator()
+        } else {
+            Button(
+                onClick = {
+                    if (email.isNotEmpty() && password.isNotEmpty()) {
+                        isLoading = true
+                        errorMessage = null
+                        scope.launch {
+                            val result = repository.loginUser(email, password)
+                            isLoading = false
+                            result.onSuccess { onLoginSuccess() }
+                                .onFailure { errorMessage = context.getString(R.string.login_error_generic, it.message ?: "") }
+                        }
+                    } else {
+                        errorMessage = context.getString(R.string.login_error_empty)
+                    }
+                },
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Text(stringResource(R.string.login_button))
+            }
+        }
+
+        TextButton(onClick = onNavigateToRegister, enabled = !isLoading) {
+            Text(stringResource(R.string.login_no_account))
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun LoginPreview() {
+    DespensappTheme {
+        LoginScreen(onLoginSuccess = {}, onNavigateToRegister = {})
+    }
+}

app/src/main/java/com/example/despensapp/ui/screens/PantryScreen.kt

@@ -0,0 +1,486 @@
+package com.example.despensapp.ui.screens
+
+import android.content.Intent
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.Logout
+import androidx.compose.material.icons.filled.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import com.example.despensapp.R
+import coil.compose.AsyncImage
+import com.example.despensapp.ui.theme.DespensappTheme
+import com.example.despensapp.data.model.Product
+import com.example.despensapp.data.repository.PantryRepository
+import com.example.despensapp.util.CategoryMapper
+import com.example.despensapp.util.DateUtils
+import kotlinx.coroutines.launch
+import java.time.LocalDate
+import java.time.format.DateTimeParseException
+import java.time.temporal.ChronoUnit
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun PantryScreen(
+    onNavigateToAdd: () -> Unit, 
+    onNavigateToDetail: (Int) -> Unit,
+    onLogout: () -> Unit
+) {
+    val context = LocalContext.current
+    val repository = remember { PantryRepository() }
+    val scope = rememberCoroutineScope()
+    val snackbarHostState = remember { SnackbarHostState() }
+    
+    var allProducts by remember { mutableStateOf<List<Product>>(emptyList()) }
+    var isLoading by remember { mutableStateOf(true) }
+    var errorMessage by remember { mutableStateOf<String?>(null) }
+    
+    // Filters and Search
+    var searchQuery by remember { mutableStateOf("") }
+    var selectedCategory by remember { mutableStateOf<String?>(null) }
+    var showOnlyNearExpiry by remember { mutableStateOf(false) }
+    var showShoppingList by remember { mutableStateOf(false) }
+
+    // Cargar productos al iniciar
+    LaunchedEffect(Unit) {
+        val result = repository.getAllProductsFromDb()
+        result.onSuccess {
+            allProducts = it
+            isLoading = false
+        }.onFailure {
+            errorMessage = context.getString(R.string.login_error_generic, it.message ?: "")
+            isLoading = false
+        }
+    }
+
+    val categories = remember(allProducts) {
+        allProducts.map { it.category }.distinct().sorted()
+    }
+
+    val filteredProducts = allProducts.filter { product ->
+        val matchesSearch = product.name.contains(searchQuery, ignoreCase = true)
+        val matchesCategory = selectedCategory == null || product.category == selectedCategory
+        val matchesExpiry = !showOnlyNearExpiry || isNearExpiry(product.expirationDate)
+        val matchesLowStock = !showShoppingList || product.isLowStock
+        
+        matchesSearch && matchesCategory && matchesExpiry && matchesLowStock
+    }
+
+    fun shareShoppingList() {
+        val lowStockProducts = allProducts.filter { it.isLowStock }
+        if (lowStockProducts.isEmpty()) {
+            scope.launch { snackbarHostState.showSnackbar(context.getString(R.string.pantry_empty_shopping_list)) }
+            return
+        }
+        
+        val listText = lowStockProducts.joinToString("\n") { "- ${it.name} ${it.minQuantity} ${it.unit}" }
+        val shareText = context.getString(R.string.shopping_list_message, listText)
+        
+        val intent = Intent(Intent.ACTION_SEND).apply {
+            type = "text/plain"
+            putExtra(Intent.EXTRA_TEXT, shareText)
+        }
+        context.startActivity(Intent.createChooser(intent, context.getString(R.string.share)))
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(if (showShoppingList) stringResource(R.string.shopping_list_title) else stringResource(R.string.pantry_title)) },
+                actions = {
+                    if (showShoppingList) {
+                        IconButton(onClick = { shareShoppingList() }) {
+                            Icon(Icons.Default.Share, contentDescription = stringResource(R.string.share))
+                        }
+                    }
+                    IconButton(onClick = { showShoppingList = !showShoppingList }) {
+                        Icon(
+                            if (showShoppingList) Icons.Default.Inventory else Icons.Default.ShoppingCart,
+                            contentDescription = "Modo Lista Compra",
+                            tint = if (showShoppingList) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.onSurface
+                        )
+                    }
+                    IconButton(onClick = onLogout) {
+                        Icon(Icons.AutoMirrored.Filled.Logout, contentDescription = stringResource(R.string.logout))
+                    }
+                },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = MaterialTheme.colorScheme.primaryContainer,
+                    titleContentColor = MaterialTheme.colorScheme.onPrimaryContainer
+                )
+            )
+        },
+        snackbarHost = { SnackbarHost(snackbarHostState) },
+        floatingActionButton = {
+            FloatingActionButton(onClick = onNavigateToAdd) {
+                Icon(Icons.Default.Add, contentDescription = stringResource(R.string.add))
+            }
+        }
+    ) { innerPadding ->
+        Column(modifier = Modifier.padding(innerPadding).fillMaxSize()) {
+            // Search Bar
+            OutlinedTextField(
+                value = searchQuery,
+                onValueChange = { searchQuery = it },
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp, vertical = 8.dp),
+                placeholder = { Text(stringResource(R.string.pantry_search_placeholder)) },
+                leadingIcon = { Icon(Icons.Default.Search, contentDescription = null) },
+                trailingIcon = {
+                    Row(verticalAlignment = Alignment.CenterVertically) {
+                        if (searchQuery.isNotEmpty()) {
+                            IconButton(onClick = { searchQuery = "" }) { 
+                                Icon(Icons.Default.Close, contentDescription = stringResource(R.string.pantry_search_clear)) 
+                            }
+                        }
+                        IconButton(onClick = onNavigateToAdd) {
+                            Icon(Icons.Default.QrCodeScanner, contentDescription = stringResource(R.string.pantry_search_scan))
+                        }
+                    }
+                },
+                singleLine = true,
+                shape = MaterialTheme.shapes.medium
+            )
+
+            // Filtros Rápidos
+            Row(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 16.dp),
+                horizontalArrangement = Arrangement.spacedBy(8.dp),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                FilterChip(
+                    selected = showOnlyNearExpiry,
+                    onClick = { showOnlyNearExpiry = !showOnlyNearExpiry },
+                    label = { Text(stringResource(R.string.pantry_filter_expiry)) },
+                    leadingIcon = if (showOnlyNearExpiry) {
+                        { Icon(Icons.Default.Warning, contentDescription = null, modifier = Modifier.size(18.dp)) }
+                    } else null
+                )
+                
+                FilterChip(
+                    selected = showShoppingList,
+                    onClick = { showShoppingList = !showShoppingList },
+                    label = { Text(stringResource(R.string.pantry_filter_low_stock)) },
+                    leadingIcon = if (showShoppingList) {
+                        { Icon(Icons.Default.PriorityHigh, contentDescription = null, modifier = Modifier.size(18.dp)) }
+                    } else null
+                )
+            }
+
+            // Categorías Scrollable
+            ScrollableTabRow(
+                selectedTabIndex = if (selectedCategory == null) 0 else categories.indexOf(selectedCategory) + 1,
+                edgePadding = 16.dp,
+                divider = {},
+                containerColor = Color.Transparent,
+                indicator = {}
+            ) {
+                Tab(
+                    selected = selectedCategory == null,
+                    onClick = { selectedCategory = null },
+                    text = { Text(stringResource(R.string.pantry_filter_all)) }
+                )
+                categories.forEach { category ->
+                    Tab(
+                        selected = selectedCategory == category,
+                        onClick = { selectedCategory = category },
+                        text = { Text(category) }
+                    )
+                }
+            }
+
+            Box(modifier = Modifier.weight(1f)) {
+                if (isLoading) {
+                    CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+                } else if (errorMessage != null) {
+                    Text(
+                        text = errorMessage!!,
+                        color = MaterialTheme.colorScheme.error,
+                        modifier = Modifier.padding(16.dp).align(Alignment.Center)
+                    )
+                } else if (filteredProducts.isEmpty()) {
+                    val emptyText = when {
+                        showShoppingList -> stringResource(R.string.pantry_empty_shopping_list)
+                        showOnlyNearExpiry -> stringResource(R.string.pantry_empty_expiry)
+                        searchQuery.isNotEmpty() -> stringResource(R.string.pantry_empty_search, searchQuery)
+                        else -> stringResource(R.string.pantry_empty_general)
+                    }
+                    Text(
+                        text = emptyText,
+                        modifier = Modifier.align(Alignment.Center),
+                        color = Color.Gray
+                    )
+                } else {
+                    LazyColumn(
+                        contentPadding = PaddingValues(16.dp),
+                        verticalArrangement = Arrangement.spacedBy(8.dp)
+                    ) {
+                        items(filteredProducts, key = { it.id }) { product ->
+                            SwipeToDeleteWrapper(
+                                onDismiss = {
+                                    scope.launch {
+                                        val result = repository.deleteProduct(product.id)
+                                        if (result.isSuccess) {
+                                            allProducts = allProducts.filter { it.id != product.id }
+                                            snackbarHostState.showSnackbar(context.getString(R.string.pantry_product_deleted, product.name))
+                                        } else {
+                                            snackbarHostState.showSnackbar(context.getString(R.string.pantry_delete_error))
+                                        }
+                                    }
+                                }
+                            ) {
+                                ProductItem(
+                                    product = product,
+                                    onItemClick = { onNavigateToDetail(product.id) },
+                                    onQuantityChange = { newQty ->
+                                        scope.launch {
+                                            val success = repository.updateProductQuantity(product.id, newQty)
+                                            if (success.isSuccess) {
+                                                allProducts = allProducts.map { 
+                                                    if (it.id == product.id) it.copy(quantity = newQty) else it 
+                                                }
+                                            }
+                                        }
+                                    }
+                                )
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun SwipeToDeleteWrapper(onDismiss: () -> Unit, content: @Composable () -> Unit) {
+    val dismissState = rememberSwipeToDismissBoxState(
+        confirmValueChange = {
+            if (it == SwipeToDismissBoxValue.EndToStart) {
+                onDismiss()
+                true
+            } else {
+                false
+            }
+        }
+    )
+
+    SwipeToDismissBox(
+        state = dismissState,
+        backgroundContent = {
+            val color = when (dismissState.targetValue) {
+                SwipeToDismissBoxValue.EndToStart -> MaterialTheme.colorScheme.errorContainer
+                else -> Color.Transparent
+            }
+            Box(
+                modifier = Modifier
+                    .fillMaxSize()
+                    .background(color, MaterialTheme.shapes.medium)
+                    .padding(horizontal = 20.dp),
+                contentAlignment = Alignment.CenterEnd
+            ) {
+                Icon(
+                    Icons.Default.Delete,
+                    contentDescription = stringResource(R.string.delete),
+                    tint = if (dismissState.targetValue == SwipeToDismissBoxValue.EndToStart) 
+                        MaterialTheme.colorScheme.error else Color.LightGray
+                )
+            }
+        },
+        enableDismissFromStartToEnd = false,
+        content = { content() }
+    )
+}
+
+fun isNearExpiry(dateStr: String?): Boolean {
+    if (dateStr == null) return false
+    return try {
+        val expiryDate = LocalDate.parse(dateStr)
+        val today = LocalDate.now()
+        val daysUntil = ChronoUnit.DAYS.between(today, expiryDate)
+        daysUntil <= 7 // Incluye caducados (negativos) y próximos (0-7 días)
+    } catch (e: DateTimeParseException) {
+        false
+    }
+}
+
+@Composable
+fun ProductItem(product: Product, onItemClick: () -> Unit, onQuantityChange: (Int) -> Unit) {
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = onItemClick),
+        elevation = CardDefaults.cardElevation(defaultElevation = 2.dp)
+    ) {
+        Row(
+            modifier = Modifier.padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Box(modifier = Modifier.size(64.dp)) {
+                AsyncImage(
+                    model = product.imageUrl,
+                    contentDescription = product.name,
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .background(Color.White, MaterialTheme.shapes.small)
+                        .padding(4.dp),
+                    error = null
+                )
+                
+                // Icono de Categoría Superpuesto
+                Surface(
+                    modifier = Modifier.align(Alignment.BottomEnd).offset(x = 4.dp, y = 4.dp),
+                    shape = MaterialTheme.shapes.extraSmall,
+                    color = MaterialTheme.colorScheme.primaryContainer,
+                    tonalElevation = 4.dp
+                ) {
+                    Icon(
+                        CategoryMapper.getIconForCategory(product.category),
+                        contentDescription = null,
+                        modifier = Modifier.size(16.dp).padding(2.dp),
+                        tint = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            }
+
+            Spacer(modifier = Modifier.width(16.dp))
+
+            Column(modifier = Modifier.weight(1f)) {
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Column(modifier = Modifier.weight(1f)) {
+                        Text(
+                            text = product.name,
+                            fontSize = 18.sp,
+                            fontWeight = FontWeight.Bold
+                        )
+                        Text(
+                            text = product.category,
+                            fontSize = 14.sp,
+                            color = Color.Gray
+                        )
+                        
+                        // Información de Fechas
+                        Column {
+                            if (product.expirationDate != null) {
+                                val expiryDate = try { LocalDate.parse(product.expirationDate) } catch (e: Exception) { null }
+                                val today = LocalDate.now()
+                                val isExpired = expiryDate?.isBefore(today) == true
+                                val nearExpiry = isNearExpiry(product.expirationDate)
+                                
+                                Row(verticalAlignment = Alignment.CenterVertically) {
+                                    Icon(
+                                        Icons.Default.CalendarToday, 
+                                        contentDescription = null, 
+                                        modifier = Modifier.size(12.dp),
+                                        tint = if (nearExpiry) MaterialTheme.colorScheme.error else Color.Gray
+                                    )
+                                    Spacer(modifier = Modifier.width(4.dp))
+                                    Text(
+                                        text = if (isExpired) stringResource(R.string.pantry_expiry_expired, DateUtils.formatToDisplay(product.expirationDate) ?: "") 
+                                               else stringResource(R.string.pantry_expiry_date, DateUtils.formatToDisplay(product.expirationDate) ?: ""),
+                                        fontSize = 12.sp,
+                                        color = if (nearExpiry) MaterialTheme.colorScheme.error else Color.Gray,
+                                        fontWeight = if (nearExpiry) FontWeight.Bold else FontWeight.Normal
+                                    )
+                                }
+                            }
+                            
+                            if (product.createdAt != null) {
+                                Row(verticalAlignment = Alignment.CenterVertically) {
+                                    Icon(
+                                        Icons.Default.History, 
+                                        contentDescription = null, 
+                                        modifier = Modifier.size(12.dp),
+                                        tint = Color.Gray
+                                    )
+                                    Spacer(modifier = Modifier.width(4.dp))
+                                    Text(
+                                        text = stringResource(R.string.pantry_added_date, DateUtils.formatToDisplay(product.createdAt) ?: ""),
+                                        fontSize = 11.sp,
+                                        color = Color.Gray
+                                    )
+                                }
+                            }
+                        }
+                    }
+
+                    if (product.isLowStock) {
+                        Icon(
+                            imageVector = Icons.Default.Warning,
+                            contentDescription = stringResource(R.string.pantry_low_stock_warning),
+                            tint = MaterialTheme.colorScheme.error,
+                            modifier = Modifier.size(24.dp)
+                        )
+                    }
+                }
+
+                Spacer(modifier = Modifier.height(8.dp))
+
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.SpaceBetween
+                ) {
+                    Surface(
+                        shape = MaterialTheme.shapes.medium,
+                        color = if (product.isLowStock) MaterialTheme.colorScheme.errorContainer
+                        else MaterialTheme.colorScheme.secondaryContainer,
+                        contentColor = if (product.isLowStock) MaterialTheme.colorScheme.onErrorContainer
+                        else MaterialTheme.colorScheme.onSecondaryContainer
+                    ) {
+                        Text(
+                            text = stringResource(R.string.pantry_units_label, product.quantity, product.unit),
+                            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+                            style = MaterialTheme.typography.bodyMedium
+                        )
+                    }
+
+                    Row {
+                        FilledTonalIconButton(
+                            onClick = { if (product.quantity > 0) onQuantityChange(product.quantity - 1) },
+                            modifier = Modifier.size(32.dp)
+                        ) {
+                            Icon(Icons.Default.Remove, contentDescription = stringResource(R.string.add_product_less), modifier = Modifier.size(18.dp))
+                        }
+                        Spacer(modifier = Modifier.width(8.dp))
+                        FilledIconButton(
+                            onClick = { onQuantityChange(product.quantity + 1) },
+                            modifier = Modifier.size(32.dp)
+                        ) {
+                            Icon(Icons.Default.Add, contentDescription = stringResource(R.string.add_product_more), modifier = Modifier.size(18.dp))
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+fun PantryScreenPreview() {
+    DespensappTheme {
+        PantryScreen(onNavigateToAdd = {}, onNavigateToDetail = {}, onLogout = {})
+    }
+}

app/src/main/java/com/example/despensapp/ui/screens/ProductDetailScreen.kt

@@ -0,0 +1,329 @@
+package com.example.despensapp.ui.screens
+
+import android.app.DatePickerDialog
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import com.example.despensapp.R
+import coil.compose.AsyncImage
+import com.example.despensapp.data.model.Product
+import com.example.despensapp.data.repository.PantryRepository
+import com.example.despensapp.util.CategoryMapper
+import com.example.despensapp.util.DateUtils
+import kotlinx.coroutines.launch
+import java.util.*
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ProductDetailScreen(productId: Int, onBack: () -> Unit) {
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+    val repository = remember { PantryRepository() }
+    var product by remember { mutableStateOf<Product?>(null) }
+    var isLoading by remember { mutableStateOf(true) }
+    var errorMessage by remember { mutableStateOf<String?>(null) }
+
+    // Edit Mode State
+    var isEditing by remember { mutableStateOf(false) }
+    var editName by remember { mutableStateOf("") }
+    var editQuantity by remember { mutableStateOf(0) }
+    var editMinQuantity by remember { mutableStateOf(0) }
+    var editUnit by remember { mutableStateOf("") }
+    var editCategory by remember { mutableStateOf("") }
+    var editExpirationDate by remember { mutableStateOf<String?>(null) }
+
+    val units = listOf("unidades", "kg", "gr", "l", "ml", "paquetes")
+    var unitsExpanded by remember { mutableStateOf(false) }
+
+    val calendar = Calendar.getInstance()
+    val datePickerDialog = DatePickerDialog(
+        context,
+        { _, year, month, dayOfMonth ->
+            editExpirationDate = "$year-${month + 1}-$dayOfMonth"
+        },
+        calendar.get(Calendar.YEAR),
+        calendar.get(Calendar.MONTH),
+        calendar.get(Calendar.DAY_OF_MONTH)
+    )
+
+    fun loadProduct() {
+        isLoading = true
+        scope.launch {
+            repository.getProductById(productId).onSuccess {
+                product = it
+                it?.let { p ->
+                    editName = p.name
+                    editQuantity = p.quantity
+                    editMinQuantity = p.minQuantity
+                    editUnit = p.unit
+                    editCategory = p.category
+                    editExpirationDate = p.expirationDate
+                }
+                isLoading = false
+            }.onFailure {
+                errorMessage = context.getString(R.string.login_error_generic, it.message ?: "")
+                isLoading = false
+            }
+        }
+    }
+
+    LaunchedEffect(productId) {
+        loadProduct()
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(if (isEditing) stringResource(R.string.detail_edit_title) else stringResource(R.string.detail_title)) },
+                navigationIcon = {
+                    IconButton(onClick = if (isEditing) { { isEditing = false } } else onBack) {
+                        Icon(if (isEditing) Icons.Default.Close else Icons.AutoMirrored.Filled.ArrowBack, 
+                             contentDescription = stringResource(if (isEditing) R.string.close else R.string.back))
+                    }
+                },
+                actions = {
+                    if (!isEditing) {
+                        IconButton(onClick = { isEditing = true }) {
+                            Icon(Icons.Default.Edit, contentDescription = stringResource(R.string.edit))
+                        }
+                    } else {
+                        IconButton(onClick = {
+                            scope.launch {
+                                isLoading = true
+                                val result = repository.updateProductFull(
+                                    productId = productId,
+                                    nombre = editName,
+                                    cantidad = editQuantity,
+                                    minCantidad = editMinQuantity,
+                                    unidad = editUnit,
+                                    categoria = editCategory,
+                                    fechaCaducidad = editExpirationDate
+                                )
+                                if (result.isSuccess) {
+                                    isEditing = false
+                                    loadProduct()
+                                } else {
+                                    errorMessage = context.getString(R.string.error_db_connection)
+                                    isLoading = false
+                                }
+                            }
+                        }) {
+                            Icon(Icons.Default.Save, contentDescription = stringResource(R.string.save))
+                        }
+                    }
+                },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = MaterialTheme.colorScheme.primaryContainer,
+                    titleContentColor = MaterialTheme.colorScheme.onPrimaryContainer
+                )
+            )
+        }
+    ) { innerPadding ->
+        Box(modifier = Modifier.padding(innerPadding).fillMaxSize()) {
+            if (isLoading) {
+                CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+            } else if (errorMessage != null) {
+                Text(text = errorMessage!!, color = MaterialTheme.colorScheme.error, modifier = Modifier.padding(16.dp))
+            } else if (product != null) {
+                val p = product!!
+                Column(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .verticalScroll(rememberScrollState())
+                ) {
+                    if (!isEditing) {
+                        // Modo Vista
+                        AsyncImage(
+                            model = p.imageUrl,
+                            contentDescription = p.name,
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .height(250.dp)
+                                .background(Color.White),
+                            contentScale = ContentScale.Fit
+                        )
+
+                        Column(modifier = Modifier.padding(16.dp)) {
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                Icon(
+                                    CategoryMapper.getIconForCategory(p.category),
+                                    contentDescription = null,
+                                    tint = MaterialTheme.colorScheme.primary,
+                                    modifier = Modifier.size(32.dp)
+                                )
+                                Spacer(modifier = Modifier.width(12.dp))
+                                Column {
+                                    Text(text = p.name, style = MaterialTheme.typography.headlineMedium, fontWeight = FontWeight.Bold)
+                                    Text(text = p.category, style = MaterialTheme.typography.titleMedium, color = Color.Gray)
+                                }
+                            }
+                            
+                            Spacer(modifier = Modifier.height(24.dp))
+
+                            DetailRow(icon = Icons.Default.Inventory, label = stringResource(R.string.detail_stock_label), value = stringResource(R.string.pantry_units_label, p.quantity, p.unit))
+                            DetailRow(icon = Icons.Default.NotificationsActive, label = stringResource(R.string.detail_low_stock_alert_label), value = stringResource(R.string.detail_low_stock_alert_value, p.minQuantity, p.unit))
+                            
+                            if (p.expirationDate != null) {
+                                DetailRow(icon = Icons.Default.Event, label = stringResource(R.string.detail_expiry_label), value = DateUtils.formatToDisplay(p.expirationDate)!!)
+                            }
+                            
+                            if (p.createdAt != null) {
+                                DetailRow(icon = Icons.Default.AccessTime, label = stringResource(R.string.detail_added_label), value = DateUtils.formatToDisplay(p.createdAt)!!)
+                            }
+
+                            Spacer(modifier = Modifier.height(32.dp))
+                            
+                            Card(
+                                modifier = Modifier.fillMaxWidth(),
+                                colors = CardDefaults.cardColors(containerColor = MaterialTheme.colorScheme.surfaceVariant)
+                            ) {
+                                Column(modifier = Modifier.padding(16.dp)) {
+                                    Row(verticalAlignment = Alignment.CenterVertically) {
+                                        Icon(Icons.Default.Info, contentDescription = null, tint = MaterialTheme.colorScheme.primary)
+                                        Spacer(modifier = Modifier.width(8.dp))
+                                        Text(stringResource(R.string.detail_mariadb_info_title), fontWeight = FontWeight.Bold)
+                                    }
+                                    Spacer(modifier = Modifier.height(8.dp))
+                                    Text(stringResource(R.string.detail_id_label, p.id), fontSize = 12.sp)
+                                    Text(stringResource(R.string.detail_server_label, "mariadb.peta9.com"), fontSize = 12.sp)
+                                }
+                            }
+                        }
+                    } else {
+                        // Modo Edición
+                        Column(modifier = Modifier.padding(16.dp)) {
+                            OutlinedTextField(
+                                value = editName,
+                                onValueChange = { editName = it },
+                                label = { Text(stringResource(R.string.add_product_name_label)) },
+                                modifier = Modifier.fillMaxWidth()
+                            )
+                            
+                            Spacer(modifier = Modifier.height(8.dp))
+
+                            OutlinedTextField(
+                                value = editCategory,
+                                onValueChange = { editCategory = it },
+                                label = { Text(stringResource(R.string.detail_category_label)) },
+                                modifier = Modifier.fillMaxWidth()
+                            )
+
+                            Spacer(modifier = Modifier.height(16.dp))
+
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                Text(stringResource(R.string.add_product_quantity_label, editQuantity), modifier = Modifier.weight(1f))
+                                IconButton(onClick = { if (editQuantity > 0) editQuantity-- }) {
+                                    Icon(Icons.Default.Remove, stringResource(R.string.add_product_less))
+                                }
+                                IconButton(onClick = { editQuantity++ }) {
+                                    Icon(Icons.Default.Add, stringResource(R.string.add_product_more))
+                                }
+                            }
+
+                            Row(verticalAlignment = Alignment.CenterVertically) {
+                                Text(stringResource(R.string.detail_min_quantity_label) + ": $editMinQuantity", modifier = Modifier.weight(1f))
+                                IconButton(onClick = { if (editMinQuantity > 0) editMinQuantity-- }) {
+                                    Icon(Icons.Default.Remove, null)
+                                }
+                                IconButton(onClick = { editMinQuantity++ }) {
+                                    Icon(Icons.Default.Add, null)
+                                }
+                            }
+
+                            Spacer(modifier = Modifier.height(8.dp))
+
+                            ExposedDropdownMenuBox(
+                                expanded = unitsExpanded,
+                                onExpandedChange = { unitsExpanded = !unitsExpanded },
+                                modifier = Modifier.fillMaxWidth()
+                            ) {
+                                OutlinedTextField(
+                                    value = editUnit,
+                                    onValueChange = {},
+                                    readOnly = true,
+                                    label = { Text(stringResource(R.string.add_product_unit_label)) },
+                                    trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = unitsExpanded) },
+                                    modifier = Modifier.menuAnchor().fillMaxWidth(),
+                                    colors = ExposedDropdownMenuDefaults.outlinedTextFieldColors()
+                                )
+                                ExposedDropdownMenu(
+                                    expanded = unitsExpanded,
+                                    onDismissRequest = { unitsExpanded = false }
+                                ) {
+                                    units.forEach { unit ->
+                                        DropdownMenuItem(
+                                            text = { Text(unit) },
+                                            onClick = {
+                                                editUnit = unit
+                                                unitsExpanded = false
+                                            }
+                                        )
+                                    }
+                                }
+                            }
+
+                            Spacer(modifier = Modifier.height(16.dp))
+
+                            OutlinedButton(
+                                onClick = { datePickerDialog.show() },
+                                modifier = Modifier.fillMaxWidth()
+                            ) {
+                                Icon(Icons.Default.CalendarToday, contentDescription = null)
+                                Spacer(modifier = Modifier.width(8.dp))
+                                Text(if (editExpirationDate == null) stringResource(R.string.add_product_expiry_button_empty) 
+                                     else stringResource(R.string.add_product_expiry_button_date, DateUtils.formatToDisplay(editExpirationDate) ?: ""))
+                            }
+                            
+                            if (editExpirationDate != null) {
+                                TextButton(onClick = { editExpirationDate = null }, modifier = Modifier.align(Alignment.CenterHorizontally)) {
+                                    Text(stringResource(R.string.cancel) + " " + stringResource(R.string.detail_expiry_label))
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun DetailRow(icon: ImageVector, label: String, value: String) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(vertical = 12.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Surface(
+            shape = MaterialTheme.shapes.small,
+            color = MaterialTheme.colorScheme.secondaryContainer,
+            modifier = Modifier.size(40.dp)
+        ) {
+            Box(contentAlignment = Alignment.Center) {
+                Icon(icon, contentDescription = null, modifier = Modifier.size(24.dp), tint = MaterialTheme.colorScheme.onSecondaryContainer)
+            }
+        }
+        Spacer(modifier = Modifier.width(16.dp))
+        Column {
+            Text(text = label, style = MaterialTheme.typography.labelMedium, color = Color.Gray)
+            Text(text = value, style = MaterialTheme.typography.bodyLarge, fontWeight = FontWeight.Medium)
+        }
+    }
+}

app/src/main/java/com/example/despensapp/ui/screens/RegisterScreen.kt

@@ -0,0 +1,124 @@
+package com.example.despensapp.ui.screens
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import com.example.despensapp.R
+import com.example.despensapp.data.repository.UserRepository
+import kotlinx.coroutines.launch
+
+@Composable
+fun RegisterScreen(onRegisterSuccess: () -> Unit, onNavigateToLogin: () -> Unit) {
+    val context = LocalContext.current
+    val repository = remember { UserRepository() }
+    val scope = rememberCoroutineScope()
+    
+    var name by remember { mutableStateOf("") }
+    var email by remember { mutableStateOf("") }
+    var password by remember { mutableStateOf("") }
+    var familyCode by remember { mutableStateOf("") }
+    
+    var isLoading by remember { mutableStateOf(false) }
+    var errorMessage by remember { mutableStateOf<String?>(null) }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .padding(24.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center
+    ) {
+        Text(
+            text = stringResource(R.string.register_title),
+            fontSize = 24.sp,
+            fontWeight = FontWeight.Bold,
+            color = MaterialTheme.colorScheme.primary
+        )
+
+        Spacer(modifier = Modifier.height(32.dp))
+
+        if (errorMessage != null) {
+            Text(text = errorMessage!!, color = MaterialTheme.colorScheme.error)
+            Spacer(modifier = Modifier.height(16.dp))
+        }
+
+        OutlinedTextField(
+            value = name,
+            onValueChange = { name = it },
+            label = { Text(stringResource(R.string.register_name_label)) },
+            modifier = Modifier.fillMaxWidth(),
+            enabled = !isLoading
+        )
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        OutlinedTextField(
+            value = email,
+            onValueChange = { email = it },
+            label = { Text(stringResource(R.string.login_email_label)) },
+            modifier = Modifier.fillMaxWidth(),
+            enabled = !isLoading
+        )
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        OutlinedTextField(
+            value = familyCode,
+            onValueChange = { familyCode = it },
+            label = { Text(stringResource(R.string.register_family_code_label)) },
+            placeholder = { Text(stringResource(R.string.register_family_code_placeholder)) },
+            modifier = Modifier.fillMaxWidth(),
+            enabled = !isLoading
+        )
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        OutlinedTextField(
+            value = password,
+            onValueChange = { password = it },
+            label = { Text(stringResource(R.string.login_password_label)) },
+            visualTransformation = PasswordVisualTransformation(),
+            modifier = Modifier.fillMaxWidth(),
+            enabled = !isLoading
+        )
+
+        Spacer(modifier = Modifier.height(24.dp))
+
+        if (isLoading) {
+            CircularProgressIndicator()
+        } else {
+            Button(
+                onClick = {
+                    if (name.isNotEmpty() && email.isNotEmpty() && password.isNotEmpty()) {
+                        isLoading = true
+                        errorMessage = null
+                        scope.launch {
+                            val result = repository.registerUser(name, email, password)
+                            isLoading = false
+                            result.onSuccess { onRegisterSuccess() }
+                                .onFailure { errorMessage = context.getString(R.string.login_error_generic, it.message ?: "") }
+                        }
+                    } else {
+                        errorMessage = context.getString(R.string.register_error_empty)
+                    }
+                },
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                Text(stringResource(R.string.register_button))
+            }
+        }
+
+        TextButton(onClick = onNavigateToLogin, enabled = !isLoading) {
+            Text(stringResource(R.string.register_already_have_account))
+        }
+    }
+}

app/src/main/java/com/example/despensapp/util/CategoryMapper.kt

@@ -0,0 +1,24 @@
+package com.example.despensapp.util
+
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.ui.graphics.vector.ImageVector
+
+object CategoryMapper {
+    fun getIconForCategory(category: String): ImageVector {
+        return when (category.lowercase()) {
+            "lácteos", "lacteos", "queso", "leche" -> Icons.Default.Icecream
+            "carnicería", "carniceria", "carne", "embutidos" -> Icons.Default.LunchDining
+            "fresco", "fruta", "verdura" -> Icons.Default.Eco
+            "limpieza", "detergente", "baño" -> Icons.Default.CleaningServices
+            "despensa", "pasta", "arroz", "legumbres" -> Icons.Default.Inventory
+            "bebidas", "agua", "refrescos", "alcohol" -> Icons.Default.LocalDrink
+            "congelados" -> Icons.Default.AcUnit
+            "panadería", "panaderia", "pan", "bollería" -> Icons.Default.BakeryDining
+            "snacks", "patatas", "dulces" -> Icons.Default.Cookie
+            "higiene", "personal", "champú" -> Icons.Default.Face
+            "mascotas", "perro", "gato" -> Icons.Default.Pets
+            else -> Icons.Default.Category
+        }
+    }
+}

app/src/main/java/com/example/despensapp/util/DateUtils.kt

@@ -0,0 +1,30 @@
+package com.example.despensapp.util
+
+import java.time.LocalDate
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+import java.time.format.DateTimeParseException
+
+object DateUtils {
+    private val dbDateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd")
+    private val dbDateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
+    private val displayFormatter = DateTimeFormatter.ofPattern("dd/MM/yyyy")
+
+    fun formatToDisplay(dateStr: String?): String? {
+        if (dateStr == null) return null
+        return try {
+            if (dateStr.length > 10) {
+                // Probablemente sea YYYY-MM-DD HH:MM:SS
+                val dateTime = LocalDateTime.parse(dateStr, dbDateTimeFormatter)
+                dateTime.format(displayFormatter)
+            } else {
+                // Probablemente sea YYYY-MM-DD
+                val date = LocalDate.parse(dateStr, dbDateFormatter)
+                date.format(displayFormatter)
+            }
+        } catch (e: DateTimeParseException) {
+            // Si falla el parseo, devolvemos el original para no perder datos
+            dateStr
+        }
+    }
+}

app/src/main/java/com/example/despensapp/worker/InventoryCheckWorker.kt

@@ -0,0 +1,56 @@
+package com.example.despensapp.worker
+
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.content.Context
+import android.os.Build
+import androidx.core.app.NotificationCompat
+import androidx.work.CoroutineWorker
+import androidx.work.WorkerParameters
+import com.example.despensapp.R
+import com.example.despensapp.data.repository.PantryRepository
+import java.text.SimpleDateFormat
+import java.util.*
+
+class InventoryCheckWorker(
+    context: Context,
+    workerParams: WorkerParameters
+) : CoroutineWorker(context, workerParams) {
+
+    override suspend fun doWork(): Result {
+        val repository = PantryRepository()
+        val result = repository.getAllProductsFromDb()
+
+        result.onSuccess { products ->
+            val lowStockProducts = products.filter { it.isLowStock }
+            
+            if (lowStockProducts.isNotEmpty()) {
+                showNotification(
+                    applicationContext.getString(R.string.notification_title),
+                    applicationContext.getString(R.string.notification_message, lowStockProducts.size)
+                )
+            }
+        }
+
+        return Result.success()
+    }
+
+    private fun showNotification(title: String, message: String) {
+        val notificationManager = applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        val channelId = "inventory_alerts"
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val channel = NotificationChannel(channelId, applicationContext.getString(R.string.notification_channel_name), NotificationManager.IMPORTANCE_DEFAULT)
+            notificationManager.createNotificationChannel(channel)
+        }
+
+        val notification = NotificationCompat.Builder(applicationContext, channelId)
+            .setSmallIcon(android.R.drawable.ic_dialog_info)
+            .setContentTitle(title)
+            .setContentText(message)
+            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+            .build()
+
+        notificationManager.notify(1, notification)
+    }
+}

app/src/main/res/drawable/ic_launcher_background.xml

@@ -4,167 +4,8 @@
     android:height="108dp"
     android:viewportWidth="108"
     android:viewportHeight="108">
+    <!-- Fondo crema suave para la app -->
     <path
-        android:fillColor="#3DDC84"
+        android:fillColor="#FDF5E6"
         android:pathData="M0,0h108v108h-108z" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M9,0L9,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,0L19,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,0L29,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,0L39,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,0L49,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,0L59,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,0L69,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,0L79,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M89,0L89,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M99,0L99,108"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,9L108,9"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,19L108,19"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,29L108,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,39L108,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,49L108,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,59L108,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,69L108,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,79L108,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,89L108,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M0,99L108,99"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,29L89,29"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,39L89,39"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,49L89,49"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,59L89,59"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,69L89,69"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M19,79L89,79"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M29,19L29,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M39,19L39,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M49,19L49,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M59,19L59,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M69,19L69,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
-    <path
-        android:fillColor="#00000000"
-        android:pathData="M79,19L79,89"
-        android:strokeWidth="0.8"
-        android:strokeColor="#33FFFFFF" />
 </vector>

app/src/main/res/drawable/ic_launcher_foreground_custom.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+
+    <!-- Estructura del mueble (Madera) -->
+    <path
+        android:fillColor="#8D6E63"
+        android:pathData="M24,24 h60 v60 h-60 z M28,28 v52 h52 v-52 z" />
+
+    <!-- Estantería 1 -->
+    <path
+        android:fillColor="#795548"
+        android:pathData="M28,45 h52 v3 h-52 z" />
+
+    <!-- Estantería 2 -->
+    <path
+        android:fillColor="#795548"
+        android:pathData="M28,65 h52 v3 h-52 z" />
+
+    <!-- Productos Estante Superior -->
+    <!-- Botella Azul -->
+    <path
+        android:fillColor="#42A5F5"
+        android:pathData="M32,32 h6 v13 h-6 z" />
+    <!-- Caja Roja -->
+    <path
+        android:fillColor="#EF5350"
+        android:pathData="M42,35 h8 v10 h-8 z" />
+    <!-- Bote Amarillo -->
+    <path
+        android:fillColor="#FFCA28"
+        android:pathData="M55,38 h6 v7 h-6 z" />
+    <!-- Caja Verde -->
+    <path
+        android:fillColor="#66BB6A"
+        android:pathData="M65,33 h10 v12 h-10 z" />
+
+    <!-- Productos Estante Medio -->
+    <!-- Caja Naranja -->
+    <path
+        android:fillColor="#FFA726"
+        android:pathData="M32,52 h12 v13 h-12 z" />
+    <!-- Botella Violeta -->
+    <path
+        android:fillColor="#AB47BC"
+        android:pathData="M50,49 h6 v16 h-6 z" />
+    <!-- Bote Azul Oscuro -->
+    <path
+        android:fillColor="#3F51B5"
+        android:pathData="M62,55 h10 v10 h-10 z" />
+
+    <!-- Productos Estante Inferior -->
+    <!-- Dos cajas pequeñas -->
+    <path
+        android:fillColor="#78909C"
+        android:pathData="M32,72 h8 v12 h-8 z M44,72 h8 v12 h-12 z" />
+    <!-- Botella de aceite -->
+    <path
+        android:fillColor="#AFB42B"
+        android:pathData="M60,69 h8 v15 h-8 z" />
+</vector>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground_custom"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@mipmap/ic_launcher_foreground"/>
 </adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@drawable/ic_launcher_background"/>
-    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground_custom"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@mipmap/ic_launcher_foreground"/>
 </adaptive-icon>

app/src/main/res/values/strings.xml

@@ -1,3 +1,92 @@
 <resources>
     <string name="app_name">Despensapp</string>
+
+    <!-- General -->
+    <string name="error_db_connection">Error al conectar con la base de datos</string>
+    <string name="loading">Cargando...</string>
+    <string name="back">Volver</string>
+    <string name="close">Cerrar</string>
+    <string name="add">Añadir</string>
+    <string name="save">Guardar</string>
+    <string name="delete">Borrar</string>
+    <string name="cancel">Cancelar</string>
+    <string name="edit">Editar</string>
+    <string name="share">Compartir</string>
+    <string name="logout">Cerrar Sesión</string>
+    <string name="flash_on">Encender Flash</string>
+    <string name="flash_off">Apagar Flash</string>
+    <string name="error_loading_products">Error al cargar productos: %1$s</string>
+    <string name="shopping_list_message">Hay que comprar lo siguiente:\n%1$s</string>
+
+    <!-- Login -->
+    <string name="login_welcome">Bienvenido a Despensapp</string>
+    <string name="login_email_label">Correo Electrónico</string>
+    <string name="login_password_label">Contraseña</string>
+    <string name="login_button">Iniciar Sesión</string>
+    <string name="login_no_account">¿No tienes cuenta? Regístrate aquí</string>
+    <string name="login_error_empty">Introduce tus credenciales</string>
+    <string name="login_error_generic">Error: %1$s</string>
+
+    <!-- Register -->
+    <string name="register_title">Crear Cuenta Familiar</string>
+    <string name="register_name_label">Nombre Completo</string>
+    <string name="register_family_code_label">Código de Familia (Opcional)</string>
+    <string name="register_family_code_placeholder">Para unirse a una despensa existente</string>
+    <string name="register_button">Registrarse</string>
+    <string name="register_already_have_account">¿Ya tienes cuenta? Inicia sesión</string>
+    <string name="register_error_empty">Por favor, rellena todos los campos</string>
+
+    <!-- Pantry Screen -->
+    <string name="pantry_title">Mi Despensa</string>
+    <string name="shopping_list_title">Lista de la Compra</string>
+    <string name="pantry_search_placeholder">Buscar productos...</string>
+    <string name="pantry_search_clear">Limpiar</string>
+    <string name="pantry_search_scan">Escanear</string>
+    <string name="pantry_filter_expiry">Caducidad</string>
+    <string name="pantry_filter_low_stock">Stock Bajo</string>
+    <string name="pantry_filter_all">Todas</string>
+    <string name="pantry_empty_shopping_list">¡Genial! No falta nada en la despensa.</string>
+    <string name="pantry_empty_expiry">No hay productos próximos a caducar.</string>
+    <string name="pantry_empty_search">No se encontraron productos para \"%1$s\".</string>
+    <string name="pantry_empty_general">La despensa está vacía.</string>
+    <string name="pantry_product_deleted">Producto eliminado: %1$s</string>
+    <string name="pantry_delete_error">Error al eliminar de la base de datos</string>
+    <string name="pantry_low_stock_warning">Stock Bajo</string>
+    <string name="pantry_units_label">%1$s %2$s</string>
+    <string name="pantry_expiry_expired">CADUCADO: %1$s</string>
+    <string name="pantry_expiry_date">Caduca: %1$s</string>
+    <string name="pantry_added_date">Añadido: %1$s</string>
+
+    <!-- Add Product -->
+    <string name="add_product_title">Añadir Producto</string>
+    <string name="add_product_barcode_detected">Producto detectado: %1$s</string>
+    <string name="add_product_name_label">Nombre del Producto</string>
+    <string name="add_product_unit_label">Unidad de Medida</string>
+    <string name="add_product_expiry_button_empty">Elegir Fecha de Caducidad</string>
+    <string name="add_product_expiry_button_date">Caduca: %1$s</string>
+    <string name="add_product_quantity_label">Cantidad: %1$d</string>
+    <string name="add_product_less">Menos</string>
+    <string name="add_product_more">Más</string>
+    <string name="add_product_save_button">Guardar en Despensa</string>
+    <string name="add_product_scan_another">Escanear otro</string>
+    <string name="add_product_camera_permission_required">Se necesita permiso de cámara para escanear</string>
+
+    <!-- Detail Screen -->
+    <string name="detail_title">Detalles del Producto</string>
+    <string name="detail_edit_title">Editar Producto</string>
+    <string name="detail_stock_label">Stock actual</string>
+    <string name="detail_low_stock_alert_label">Alerta stock bajo</string>
+    <string name="detail_low_stock_alert_value">Menos de %1$s %2$s</string>
+    <string name="detail_expiry_label">Fecha de caducidad</string>
+    <string name="detail_added_label">Fecha de alta</string>
+    <string name="detail_category_label">Categoría</string>
+    <string name="detail_min_quantity_label">Cantidad Mínima</string>
+    <string name="detail_mariadb_info_title">Información de MariaDB</string>
+    <string name="detail_id_label">ID interno: %1$d</string>
+    <string name="detail_server_label">Servidor: mariadb.peta9.com</string>
+
+    <!-- Worker / Notifications -->
+    <string name="notification_title">¡Revisa tu despensa!</string>
+    <string name="notification_message">Tienes %1$d productos con stock bajo.</string>
+    <string name="notification_channel_name">Alertas de Inventario</string>
 </resources>

gradle/libs.versions.toml

@@ -8,6 +8,15 @@ lifecycleRuntimeKtx = "2.11.0"
 activityCompose = "1.13.0"
 kotlin = "2.2.10"
 composeBom = "2026.02.01"
+navigationCompose = "2.8.5"
+retrofit = "2.11.0"
+okhttp = "4.12.0"
+mariadbJavaClient = "3.5.10"
+camerax = "1.4.1"
+barcodeScanning = "17.3.0"
+coil = "2.7.0"
+workManager = "2.10.0"
+room = "2.6.1"
 
 [libraries]
 androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
@@ -24,6 +33,23 @@ androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "u
 androidx-compose-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
 androidx-compose-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
 androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
+retrofit = { group = "com.squareup.retrofit2", name = "retrofit", version.ref = "retrofit" }
+retrofit-gson = { group = "com.squareup.retrofit2", name = "converter-gson", version.ref = "retrofit" }
+okhttp = { group = "com.squareup.okhttp3", name = "okhttp", version.ref = "okhttp" }
+okhttp-logging = { group = "com.squareup.okhttp3", name = "logging-interceptor", version.ref = "okhttp" }
+mariadb-java-client = { group = "org.mariadb.jdbc", name = "mariadb-java-client", version.ref = "mariadbJavaClient" }
+androidx-camera-core = { group = "androidx.camera", name = "camera-core", version.ref = "camerax" }
+androidx-camera-camera2 = { group = "androidx.camera", name = "camera-camera2", version.ref = "camerax" }
+androidx-camera-lifecycle = { group = "androidx.camera", name = "camera-lifecycle", version.ref = "camerax" }
+androidx-camera-view = { group = "androidx.camera", name = "camera-view", version.ref = "camerax" }
+barcode-scanning = { group = "com.google.mlkit", name = "barcode-scanning", version.ref = "barcodeScanning" }
+coil-compose = { group = "io.coil-kt", name = "coil-compose", version.ref = "coil" }
+androidx-work-runtime = { group = "androidx.work", name = "work-runtime-ktx", version.ref = "workManager" }
+androidx-room-runtime = { group = "androidx.room", name = "room-runtime", version.ref = "room" }
+androidx-room-ktx = { group = "androidx.room", name = "room-ktx", version.ref = "room" }
+androidx-room-compiler = { group = "androidx.room", name = "room-compiler", version.ref = "room" }
+material-icons-extended = { group = "androidx.compose.material", name = "material-icons-extended" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }