feat(launcher): Campaign LA add Avalonia desktop shell

docs/architecture/acdream-architecture.md

@@ -279,9 +279,22 @@ src/
        tests/AcDream.Platform.Tests/PlatformDependencyBoundaryTests.cs);
        Runtime and App reference it directly; Headless reaches it
        transitively through Runtime (K0 guard: Headless declares exactly
-       one project reference); the external launcher (AcDream.Launcher.Core,
-       Campaign LA — under construction) references ONLY this project from
-       the game solution
+       one project reference)
+
+  AcDream.Launcher.Core/     BCL-only launcher state/orchestration owner
+    Profiles/                -> sole credential/profile document + CRUD owner
+    Launching/               -> config composition and supervised process seams
+    Status/                  -> incremental host-status parsing/tailing
+    Orchestration/           -> immutable UI snapshots, typed actions,
+                                capability gates, and running-session lifetime
+    -> references Platform only; no Avalonia or game-host dependency
+
+  AcDream.Launcher/          Avalonia 12 Windows/Linux desktop shell
+    ViewModels/              -> thin MVVM projection over Launcher.Core
+    -> references Launcher.Core only (Platform transitively); it never owns
+       a second profile, process, status, or credential state graph
+    -> Linux launcher/probe/headless flows remain portable; graphical-client
+       actions are explicitly disabled until Modern Runtime Slice L resumes
 
   AcDream.Headless/          Linux/Windows no-window production host
     Program.cs               -> CLI entry only