chore(build): 빌드 설정 업데이트

- Android: proguard 규칙 추가, build.gradle 업데이트
- iOS: 권한 설정 및 프로젝트 구성 업데이트
- macOS: 앱 정보 및 entitlements 업데이트

android/app/build.gradle.kts

@@ -48,6 +48,12 @@ android {
 
     buildTypes {
         release {
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
             signingConfig = signingConfigs.getByName("release")
         }
     }

android/app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Flutter 기본 규칙
+-keep class io.flutter.app.** { *; }
+-keep class io.flutter.plugin.** { *; }
+-keep class io.flutter.util.** { *; }
+-keep class io.flutter.view.** { *; }
+-keep class io.flutter.** { *; }
+-keep class io.flutter.plugins.** { *; }
+
+# Google Mobile Ads (AdMob)
+-keep class com.google.android.gms.ads.** { *; }
+-keep class com.google.ads.** { *; }
+
+# In-App Purchase (Google Play Billing)
+-keep class com.android.vending.billing.** { *; }
+
+# Kotlin 직렬화(serialization) 관련
+-keepattributes *Annotation*
+-keepattributes InnerClasses
+
+# 제네릭(generics) 시그니처 유지
+-keepattributes Signature

android/app/src/main/AndroidManifest.xml

@@ -1,9 +1,11 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    <!-- IAP 결제 권한 -->
+    <!-- AdMob 광고 로드에 필요 -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <!-- IAP 결제(billing) 권한 -->
     <uses-permission android:name="com.android.vending.BILLING" />
 
     <application
-        android:label="asciineverdie"
+        android:label="ASCII Never Die"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <!-- Copyright Protection -->