build(mobile): 在移动构建中排除 SoundFlow 原生资产

为避免将 SoundFlow 的本机运行时资产打包到移动分支，调整 SecRandom.csproj：在非移动构建下正常引用 SoundFlow，移动构建下保留其托管程序集但通过 ExcludeAssets="native" 排除原生资产。并在 AGENTS.md 中补充说明：移动构建保留 SoundFlow 的托管依赖以兼容共享代码，但 Android/iOS 的实际播放由 IMobileMediaPlayer 提供，从而避免引入不必要的原生资源。

Author: lzy98276

SecRandom/AGENTS.md

@@ -116,7 +116,7 @@ SecRandom/
 - Plugin logs are not separate files. They write through the existing `ILogger` pipeline with category prefix `SecRandom.Plugin[<plugin-id>].`; plugin detail UI must only show entries for the selected plugin.
 - Plugin draw access is invocation-only through `IPluginDrawInvoker`; do not pass `DrawEngine`, mutable profile history, draw config, or random sources into plugin contexts.
 - Picking `ClearRecord` is about app-layer temporary draw records, not persistent profile histories. RollCall and QuickDraw share student temporary records; Lottery uses prize temporary records.
-- `MusicLibraryService` owns `data/audio/music` and new selection IDs. Student/prize attached music settings can override only animation/result selections; a multi-record draw uses the first drawn record as the music source. Deleting a track clears global and per-record references. Keep SoundFlow types private to `DrawAudioService`; each resolved draw music setting owns `AnimationMusicLoop`, process playback must stop immediately on cancellation/disposal, and transitions to result music without delaying draw results. Legacy absolute paths are read-only compatibility entries; do not create new external-path selections.
+- `MusicLibraryService` owns `data/audio/music` and new selection IDs. Student/prize attached music settings can override only animation/result selections; a multi-record draw uses the first drawn record as the music source. Deleting a track clears global and per-record references. Keep SoundFlow types private to `DrawAudioService`; each resolved draw music setting owns `AnimationMusicLoop`, process playback must stop immediately on cancellation/disposal, and transitions to result music without delaying draw results. Mobile builds retain SoundFlow's managed assembly for the shared app but exclude its unused native assets; `IMobileMediaPlayer` owns Android/iOS playback. Legacy absolute paths are read-only compatibility entries; do not create new external-path selections.
 - ViewModels must be registered in Host and inherit `ViewModelBase`; `ViewModelBase` exposes `Config`.
 - Keep shell/profile/base ViewModels in `ViewModels/`; page-specific main ViewModels belong in `ViewModels/MainPages/`, and history settings page ViewModels belong in `ViewModels/SettingsPages/History/`.
 - Use `IAppHost.GetService<T>()` for existing service resolution patterns in views and services.

SecRandom/SecRandom.csproj

@@ -430,7 +430,9 @@
         <PackageReference Include="Sentry.Extensions.Logging" Version="6.6.0" />
         <PackageReference Include="Sentry.Profiling" Version="6.6.0" Condition="'$(BuildMobile)' != 'true'" />
         <PackageReference Include="QRCoder" Version="1.7.0" />
-        <PackageReference Include="SoundFlow" Version="[1.2.1.3]" />
+        <PackageReference Include="SoundFlow" Version="[1.2.1.3]" Condition="'$(BuildMobile)' != 'true'" />
+        <!-- Android/iOS playback uses IMobileMediaPlayer; retain the managed dependency but omit SoundFlow's unused native runtime asset. -->
+        <PackageReference Include="SoundFlow" Version="[1.2.1.3]" Condition="'$(BuildMobile)' == 'true'" ExcludeAssets="native" />
         <PackageReference Include="ClassIsland.Shared.IPC" Version="2.1.0.1" />
         <PackageReference Include="System.Security.Cryptography.ProtectedData" Version="10.0.0" />
         <PackageReference Include="Microsoft.Extensions.Http" Version="10.0.3" />