build + feat: imlementacion de estrucutras de interfaz grafica, construccion del proyecto. Pendiente de arreglar: errores en interfaces

android/app/build.gradle

@@ -0,0 +1,52 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
+android {
+      namespace "com.example.flutter_application_1"
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        // 📍 DEBE IR AQUÍ: Adentro de android, pero AFUERA de defaultConfig
+        coreLibraryDesugaringEnabled true
+        
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    defaultConfig {
+        // ⚠️ AQUÍ ADENTRO NO DEBE IR EL DESUGARING
+        applicationId "com.example.flutter_application_1"
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
+        versionCode flutter.versionCode
+        versionName flutter.versionName
+    }
+    
+
+    buildTypes {
+        release {
+            // TODO: Add your own signing config for the release build.
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig = signingConfigs.debug
+        }
+    }
+
+
+flutter {
+    source = "../.."
+}
+
+dependencies {
+    // 📍 AGREGA ESTA LÍNEA AL FINAL DE LAS DEPENDENCIAS:
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.0.3'
+}
+}