接入原生壳本地通知能力

新增 notification.showLocal HostBridge 契约和 H5 facade

移动端通过 expo-notifications 发送即时本地通知

桌面端通过 Tauri notification 插件发送系统通知

更新壳能力检查、测试、方案文档和共享决策记录

apps/desktop-shell/scripts/check-config.mjs

@@ -147,7 +147,10 @@ const requiredMainSnippets = [
   '"file.exportImage"',
   '"file.importImage"',
   '"file.imageDropped"',
+  '"notification.showLocal"',
   'tauri_plugin_dialog::init()',
+  'tauri_plugin_notification::init()',
+  'tauri_plugin_notification::NotificationExt',
   '"copied_to_clipboard"',
   '"file export cancelled"',
   '"file import cancelled"',
@@ -163,6 +166,7 @@ const requiredMainSnippets = [
   'resolve_desktop_network_status',
   'network.statusChanged',
   'file.imageDropped',
+  'app.notification().builder()',
 ];
 
 for (const permission of requiredPermissions) {