feat(desktop): add native Windows game streaming

.github/workflows/ci.yml

@@ -145,6 +145,15 @@ jobs:
         if: runner.os == 'macOS'
         run: mise test-desktop-macos-capture
 
+      - name: Test Windows game-capture helper
+        if: runner.os == 'Windows'
+        shell: pwsh
+        run: |
+          $probe = "apps/desktop/native/windows-capture-probe"
+          cmake -S $probe -B "$probe/build" -A x64
+          cmake --build "$probe/build" --config RelWithDebInfo
+          ctest --test-dir "$probe/build" -C RelWithDebInfo --output-on-failure
+
       - name: Build desktop bundle
         run: mise desktop-build
 

NOTICE

@@ -105,11 +105,21 @@ Desktop Components:
   Foundation and Electron contributors
 - LiveKit client SDK for Swift (https://github.com/livekit/client-sdk-swift) -
   Apache License 2.0; Copyright 2023 LiveKit, Inc.
+- Chatto fork of the LiveKit client SDK for C++
+  (https://github.com/chattocorp/client-sdk-cpp) - Apache License 2.0;
+  Copyright 2025-2026 LiveKit, Inc.
+- Chatto fork of the LiveKit client SDK for Rust
+  (https://github.com/chattocorp/rust-sdks) - Apache License 2.0;
+  Copyright 2026 LiveKit, Inc.
+- FFmpeg nv-codec-headers (https://github.com/FFmpeg/nv-codec-headers) -
+  MIT License; NVIDIA NVENC API header copyright NVIDIA Corporation
 - LiveKit UniFFI XCFramework
   (https://github.com/livekit/livekit-uniffi-xcframework) - Apache License 2.0
 - LiveKit WebRTC XCFramework (https://github.com/livekit/webrtc-xcframework) -
   MIT License; Copyright 2021 WebRTC SDKs; bundled WebRTC is BSD 3-Clause and
   includes third-party components under their respective licences
+- Microsoft Visual C++ Redistributable runtime libraries - distributed under
+  the Microsoft Visual Studio license terms
 - Swift Protobuf (https://github.com/apple/swift-protobuf) - Apache License 2.0
 - Chromium (https://www.chromium.org/) - BSD 3-Clause License and other
   licences included in Electron's bundled `LICENSES.chromium.html`

apps/desktop/README.md

@@ -41,11 +41,14 @@ mise desktop-build
 
 The build task first produces the frontend, then packages the host-platform
 bundle beneath `apps/desktop/dist/`. macOS builds include the native
-ScreenCaptureKit game-capture helper and its pinned LiveKit frameworks. CI
-checks and packages macOS, Windows, and Linux bundles, verifies the nested macOS
-helper, and validates the complete app signature. The current release archives
-use ad-hoc signing, so macOS may warn about or block them until production
-Developer ID signing and notarisation are added.
+ScreenCaptureKit game-capture helper and its pinned LiveKit frameworks. Windows
+x64 builds include the Windows Graphics Capture/WASAPI helper and pinned
+LiveKit C++ runtime plus its required Visual C++ redistributable DLLs. CI
+checks and packages macOS, Windows, and Linux bundles
+and tests the native helpers. The current release archives are not
+production-signed: macOS may warn or block them, and Windows Smart App Control
+may block a newly built helper, until trusted signing and macOS notarisation are
+added.
 
 Electron handles camera, microphone, and notification permission requests only
 for the fixed app origin. Screen sharing presents a native source picker.