Bosner RustDesk 1.4.9-6, macOS ARM64

Source commit: 7a5b8bf046fc40175dc5dd63ee51bece4ea5c413
hbb_common: b2b1ac453d1d694046f63be20d792d608dac1c93

The source archive includes the client tree, the pinned hbb_common source,
the Bosner patches, and the complete build/signing workflow. It contains
source, not the Homebrew, Rust, Flutter, or vcpkg binary caches.

Before building, apply the supplied hbb_common patch once:
  patch -p1 -d libs/hbb_common < .github/patches/bosner-hbb-common.patch

Follow .github/workflows/bosner-macos-build.yml for the pinned toolchain,
Flutter bridge generation, vcpkg inputs, macOS 12.3 target configuration,
build options, and signing steps. The workflow's native Flutter tool setup
uses official artifacts of exactly the same engine revision and validates
the archive and executable SHA-256 hashes. Rosetta is not required.

Our signing key and Apple notarization credentials are not included and
are not needed to build the application; use your own credentials or
omit signing/notarization for a local development build.

Client license: AGPL-3.0; see the included LICENSE and dependency notices.