chore(client/macos): bundle id 改为 com.pangolin.pangolin

去掉 Vpn 后缀:macOS 主 app + RunnerTests + Debug/Release entitlements 的
keychain-access-groups 统一为 com.pangolin.pangolin(便于 Apple 签名注册)。
iOS/Android 暂未改(iOS 涉 App Group + PacketTunnel 扩展,需统一时单独处理)。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/macos/Runner/Configs/AppInfo.xcconfig

@@ -8,7 +8,7 @@
 PRODUCT_NAME = pangolin_vpn
 
 // The application's bundle identifier
-PRODUCT_BUNDLE_IDENTIFIER = com.pangolin.pangolinVpn
+PRODUCT_BUNDLE_IDENTIFIER = com.pangolin.pangolin
 
 // The copyright displayed in application information
 PRODUCT_COPYRIGHT = Copyright © 2026 com.pangolin. All rights reserved.