Stamp release versions and harden launcher

Add automatic release version stamping and multiple launcher reliability improvements. The Release workflow now runs scripts/Set-ReleaseVersion.ps1 in build jobs to inject tag-derived Version/AssemblyVersion into project metadata; several .csproj/Directory.Build.props and app.manifest files were changed to use a dev placeholder. Introduced AppVersionProvider (and related runtime metadata) to centralize version resolution and updated DeploymentLocator to use it and to prefer package-root/version.json. Launcher startup flow was hardened: added startup success tracking, public-activation recovery path, improved success/fallback semantics, and related IPC handling. UI/UX fixes include OOBE entrance/exit animation improvements (scaling-aware, concurrent fade+translate) and minor window lifecycle reorder in DesktopShellHost. CommandContext now recognizes restart and key=value args. New DesktopTrayService and .trae spec files (spec, checklist, tasks) document shell/tray hardening work. Miscellaneous logging, comments and housekeeping edits across launcher and shared contracts to support the above.

LanMountainDesktop.Launcher/CommandContext.cs

@@ -121,6 +121,7 @@ internal sealed class CommandContext
         return raw.Trim().ToLowerInvariant() switch
         {
             "normal" => "normal",
+            "restart" => "restart",
             "postinstall" => "postinstall",
             "apply-update" => "apply-update",
             "plugin-install" => "plugin-install",
@@ -146,6 +147,13 @@ internal sealed class CommandContext
                 continue;
             }
 
+            var equalsIndex = key.IndexOf('=');
+            if (equalsIndex >= 0)
+            {
+                values[key[..equalsIndex]] = key[(equalsIndex + 1)..];
+                continue;
+            }
+
             if (i + 1 < args.Length && !args[i + 1].StartsWith("--", StringComparison.Ordinal))
             {
                 values[key] = args[++i];