加入 release 簽章設定（keystore.properties gitignored）

android/.gitignore

@@ -1,6 +1,7 @@
 .gradle/
 build/
 local.properties
+keystore.properties
 *.iml
 .idea/
 .kotlin/

android/app/build.gradle.kts

@@ -1,9 +1,16 @@
+import java.util.Properties
+
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
     id("org.jetbrains.kotlin.plugin.compose")
 }
 
+val keystoreProps = Properties().apply {
+    val f = rootProject.file("keystore.properties")
+    if (f.exists()) f.inputStream().use { load(it) }
+}
+
 android {
     namespace = "tw.local.botrates"
     compileSdk = 34
@@ -29,6 +36,17 @@ android {
         compose = true
     }
 
+    signingConfigs {
+        if (keystoreProps.isNotEmpty()) {
+            create("release") {
+                storeFile = file(keystoreProps.getProperty("storeFile"))
+                storePassword = keystoreProps.getProperty("storePassword")
+                keyAlias = keystoreProps.getProperty("keyAlias")
+                keyPassword = keystoreProps.getProperty("keyPassword")
+            }
+        }
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = false
@@ -36,6 +54,9 @@ android {
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            if (keystoreProps.isNotEmpty()) {
+                signingConfig = signingConfigs.getByName("release")
+            }
         }
     }