xammen6/7/2026, 6:52:41 PM

Convert the legacy non-SDK csproj to SDK-style targeting
net8.0-windows10.0.19041.0, restoring GPU-capable WPF as the foundation
for the native DWM backdrop work (Plan 1).

- csproj: SDK-style, auto-glob sources (verified 1:1 with the old explicit
  list), PackageReference instead of packages.config, x86 + Build\Release
  output preserved. In-box net8 assemblies dropped (System.Memory, Text.Json,
  ValueTuple, Immutable, Unsafe, AsyncInterfaces, ...).
- versioning: GitVersionTask 5.5.1 -> GitVersion.MsBuild 5.12.0; manifest
  stamping re-wired via prebuild.ps1.
- CA1416/WFAC010 scoped to NoWarn (Windows-only app, runtime-gated calls;
  WPF owns DPI via App.manifest PerMonitorV2).
- Remove obsolete [HandleProcessCorruptedStateExceptions] (SYSLIB0032).
- Remove legacy App.config (declared .NET 4.6.2, DPI switch ignored on net8,
  redundant binding redirect); DPI now solely via App.manifest.
- DWM plumbing (no behavior change yet): backdrop type, immersive dark mode,
  border color attributes + WindowExtensions helpers for upcoming native
  Mica/Acrylic flyout.

Build green: dotnet build -c Release -p:Platform=x86 (0 errors, 0 warnings),
exe + 32 satellite locales produced. App verified launching and stable.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Parent3a9c6b0