Initial commit

app/src/main/kotlin/com/example/architecture/MainActivity.kt

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+package com.example.architecture
+
+import android.os.Bundle
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.fragment.app.FragmentActivity
+import androidx.fragment.compose.AndroidFragment
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
+import com.example.architecture.core.design.system.theme.AppTheme
+import com.example.architecture.feature.about.presentation.AboutRoute
+import com.example.architecture.feature.about.presentation.aboutGraph
+import com.example.architecture.feature.characters.presentation.compose.CharacterDetailRoute
+import com.example.architecture.feature.characters.presentation.compose.CharacterListRoute
+import com.example.architecture.feature.characters.presentation.compose.charactersGraph
+import com.example.architecture.feature.characters.presentation.views.CharacterListFragment
+
+/**
+ * Hosts the single Compose NavHost and owns every cross-feature / cross-toolkit wiring:
+ * - the characters graph (Compose list + detail),
+ * - the About graph (MVVM contrast),
+ * - the Views renderer embedded via [AndroidFragment] (Compose↔View interop).
+ *
+ * Extends [FragmentActivity] (not plain ComponentActivity) so [AndroidFragment] has a FragmentManager.
+ */
+class MainActivity : FragmentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            AppTheme {
+                val navController = rememberNavController()
+                NavHost(
+                    navController = navController,
+                    startDestination = CharacterListRoute,
+                ) {
+                    charactersGraph(
+                        navController = navController,
+                        onOpenAbout = { navController.navigate(AboutRoute) },
+                        onOpenViewsList = { navController.navigate(CharactersViewsRoute) },
+                    )
+                    aboutGraph(
+                        onNavigateBack = { navController.popBackStack() },
+                    )
+                    // Compose↔View interop: the same characters list, rendered by a Fragment. :app
+                    // injects the navigation callbacks so the Views module stays nav-agnostic.
+                    composable<CharactersViewsRoute> {
+                        AndroidFragment<CharacterListFragment> { fragment ->
+                            fragment.onCharacterClick = { id ->
+                                navController.navigate(CharacterDetailRoute(id))
+                            }
+                            fragment.onNavigateBack = { navController.popBackStack() }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}