feat(app_zen_box): 初始化安卓端项目配置，完善资源与构建流程

1.  添加安卓端启动图标、启动页资源与配置文件
2.  更新API接口地址为正式服务器地址
3.  调整package.json脚本与依赖项
4.  完善安卓项目构建配置与原生代码
5.  修复剪贴板下载按钮逻辑，改为流式下载

apps/app_zen_box/android/build.gradle

@@ -0,0 +1,28 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+  repositories {
+    maven { url 'https://maven.aliyun.com/repository/google' }
+    maven { url 'https://maven.aliyun.com/repository/public' }
+    google()
+    mavenCentral()
+  }
+  dependencies {
+    classpath('com.android.tools.build:gradle')
+    classpath('com.facebook.react:react-native-gradle-plugin')
+    classpath('org.jetbrains.kotlin:kotlin-gradle-plugin')
+  }
+}
+
+allprojects {
+  repositories {
+    maven { url 'https://maven.aliyun.com/repository/google' }
+    maven { url 'https://maven.aliyun.com/repository/public' }
+    google()
+    mavenCentral()
+    maven { url 'https://www.jitpack.io' }
+  }
+}
+
+apply plugin: "expo-root-project"
+apply plugin: "com.facebook.react.rootproject"