feat: 支持动态版本号生成与读取

- build.gradle.kts 根据 baseVersion + git hash + buildDate 生成 versionName
- gradle.properties 添加 app.version.base=1.0.0
- 新增 expect/actual getAppVersion()，Android 从 PackageInfo 读取，iOS 从 NSBundle 读取
- AboutScreen 使用 getAppVersion() 替代硬编码 AppInfo.VERSION

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

androidApp/build.gradle.kts

@@ -1,9 +1,25 @@
+import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
+
 plugins {
     alias(libs.plugins.androidApplication)
     alias(libs.plugins.composeMultiplatform)
     alias(libs.plugins.composeCompiler)
 }
 
+val baseVersion = findProperty("app.version.base") as? String ?: "1.0.0"
+
+val gitHash = try {
+    providers.exec {
+        commandLine("git", "rev-parse", "--short=5", "HEAD")
+    }.standardOutput.asText.get().trim()
+} catch (_: Exception) {
+    "unknown"
+}
+
+val buildDate = LocalDateTime.now().format(DateTimeFormatter.ofPattern("ddMMyy"))
+val appVersionName = "${baseVersion}_${gitHash}_${buildDate}"
+
 android {
     namespace = "plus.rua.project"
     compileSdk = libs.versions.android.compileSdk.get().toInt()
@@ -13,7 +29,7 @@ android {
         minSdk = libs.versions.android.minSdk.get().toInt()
         targetSdk = libs.versions.android.targetSdk.get().toInt()
         versionCode = 1
-        versionName = "1.0"
+        versionName = appVersionName
 
         ndk {
             abiFilters += listOf("arm64-v8a", "armeabi-v7a")

gradle.properties

@@ -9,6 +9,9 @@ org.gradle.caching=true
 org.gradle.parallel=true
 org.gradle.daemon=true
 
+#App
+app.version.base=1.0.0
+
 #Android
 android.nonTransitiveRClass=true
 android.useAndroidX=true

shared/src/androidMain/kotlin/plus/rua/project/Platform.android.kt

@@ -5,6 +5,7 @@ import androidx.activity.BackEventCompat
 import androidx.activity.compose.BackHandler
 import androidx.activity.compose.PredictiveBackHandler
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.flow.Flow
 
@@ -18,6 +19,25 @@ actual fun getGifUri(gifFile: String): String = "file:///android_asset/gifs/$gif
 
 actual fun getAppIconUri(): String = "file:///android_asset/app_icon.png?v=2"
 
+@Composable
+actual fun getAppVersion(): String {
+    val context = LocalContext.current.applicationContext
+    return try {
+        val packageInfo = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            context.packageManager.getPackageInfo(
+                context.packageName,
+                android.content.pm.PackageManager.PackageInfoFlags.of(0)
+            )
+        } else {
+            @Suppress("DEPRECATION")
+            context.packageManager.getPackageInfo(context.packageName, 0)
+        }
+        packageInfo.versionName ?: "unknown"
+    } catch (_: Exception) {
+        "unknown"
+    }
+}
+
 @Composable
 actual fun PredictiveBackHandler(
     enabled: Boolean,

shared/src/commonMain/kotlin/plus/rua/project/Platform.kt

@@ -18,6 +18,9 @@ expect fun getGifUri(gifFile: String): String
 
 expect fun getAppIconUri(): String
 
+@Composable
+expect fun getAppVersion(): String
+
 /**
  * 预测性返回手势处理器（Android 13+）。
  *

shared/src/commonMain/kotlin/plus/rua/project/ui/AboutScreen.kt

@@ -27,6 +27,7 @@ import androidx.compose.ui.unit.dp
 import com.github.panpf.sketch.AsyncImage
 import plus.rua.project.AppInfo
 import plus.rua.project.getAppIconUri
+import plus.rua.project.getAppVersion
 
 /**
  * 关于页面，展示应用图标、名称、版本号及开源许可入口。
@@ -100,7 +101,7 @@ fun AboutScreen(
             Spacer(modifier = Modifier.height(8.dp))
 
             Text(
-                text = "版本：${AppInfo.VERSION}",
+                text = "版本：${getAppVersion()}",
                 style = MaterialTheme.typography.bodyMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )

shared/src/iosMain/kotlin/plus/rua/project/Platform.ios.kt

@@ -1,6 +1,7 @@
 package plus.rua.project
 
 import androidx.compose.runtime.Composable
+import platform.Foundation.NSBundle
 import platform.UIKit.UIDevice
 
 class IOSPlatform : Platform {
@@ -14,6 +15,15 @@ actual fun getGifUri(gifFile: String): String = "compose.resource://files/$gifFi
 
 actual fun getAppIconUri(): String = "compose.resource://files/app_icon.png?v=2"
 
+@Composable
+actual fun getAppVersion(): String {
+    return try {
+        NSBundle.mainBundle.objectForInfoDictionaryKey("CFBundleShortVersionString") as? String ?: "unknown"
+    } catch (_: Throwable) {
+        "unknown"
+    }
+}
+
 @Composable
 actual fun PredictiveBackHandler(
     enabled: Boolean,