Initial commit: RustDesk 1.4.7 macOS desktop port

- Filled empty libs/hbb_common/ submodule (cloned from rustdesk/hbb_common)
- Patched Flutter 3.44 / Dart 3.12 compatibility:
  * flutter/lib/generated_bridge.dart: asTypedList with cast<>, DartPort=Int64
  * flutter/lib/common.dart: DialogTheme->DialogThemeData, TabBarTheme->TabBarThemeData
  * flutter/pubspec.yaml: extended_text 14.0.0->15.0.2, google_fonts override 5.0.0
  * flutter/macos/Runner/Configs/Release.xcconfig: EXCLUDED_ARCHS=x86_64
- Build verified: cargo check + cargo build --features flutter + cargo build --release --features flutter
- Verified flutter build macos --debug and --release both produce working .app
- Verified .dmg installer (27MB arm64) created via hdiutil
- Build deps: Xcode 26.5, CocoaPods 1.16.2, Flutter 3.44, VCPKG arm64-osx

Dockerfile

@@ -0,0 +1,64 @@
+FROM debian:bullseye-slim
+
+WORKDIR /
+ARG DEBIAN_FRONTEND=noninteractive
+ENV VCPKG_FORCE_SYSTEM_BINARIES=1
+RUN apt update -y && \
+    apt install --yes --no-install-recommends \
+        g++ \
+        gcc \
+        git \
+        curl \
+        nasm \
+        yasm \
+        libgtk-3-dev \
+        clang \
+        libxcb-randr0-dev \
+        libxdo-dev \
+        libxfixes-dev \
+        libxcb-shape0-dev \
+        libxcb-xfixes0-dev \
+        libasound2-dev \
+        libpam0g-dev \
+        libpulse-dev \
+        make \
+        wget \
+        libssl-dev \
+        unzip \
+        zip \
+        sudo \
+        libgstreamer1.0-dev \
+        libgstreamer-plugins-base1.0-dev \
+        ca-certificates \
+        ninja-build && \
+        rm -rf /var/lib/apt/lists/*
+
+RUN wget https://github.com/Kitware/CMake/releases/download/v3.30.6/cmake-3.30.6.tar.gz --no-check-certificate && \
+    tar xzf cmake-3.30.6.tar.gz && \
+    cd cmake-3.30.6 && \
+    ./configure  --prefix=/usr/local && \
+    make && \
+    make install
+
+RUN git clone --branch 2023.04.15 --depth=1 https://github.com/microsoft/vcpkg && \
+    /vcpkg/bootstrap-vcpkg.sh -disableMetrics && \
+    /vcpkg/vcpkg --disable-metrics install libvpx libyuv opus aom
+
+RUN groupadd -r user && \
+    useradd -r -g user user --home /home/user && \
+    mkdir -p /home/user/rustdesk && \
+    chown -R user: /home/user && \
+    echo "user ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/user
+
+WORKDIR /home/user
+RUN curl -LO https://raw.githubusercontent.com/c-smile/sciter-sdk/master/bin.lnx/x64/libsciter-gtk.so
+
+USER user
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs > rustup.sh && \
+    chmod +x rustup.sh && \
+    ./rustup.sh -y
+
+USER root
+ENV HOME=/home/user
+COPY ./entrypoint.sh /
+ENTRYPOINT ["/entrypoint.sh"]