🍎 Add macOS packaging + cross-platform build system

🔄 Unified build pipeline for Linux/macOS from Linux hosts

build.sh

@@ -0,0 +1,47 @@
+#!/bin/zsh
+set -e  # Exit on any error
+
+log() {
+    echo "🔨 $1"
+}
+
+error() {
+    echo "❌ $1"
+    exit 1
+}
+
+# Build Relay component
+log "Building Relay..."
+(cd ../Relay && ./build.sh) || error "Relay build failed"
+
+# Setup extras directory
+log "Setting up extras directory..."
+mkdir -p extras/linux extras/macos
+cp ../Relay/dist/relay-x86_64-unknown-linux-gnu ./extras/linux/relay || error "Failed to copy Linux relay"
+cp ../Relay/dist/relay-x86_64-apple-darwin ./extras/macos/relay || error "Failed to copy macOS relay"
+
+# Clean previous builds
+log "Cleaning previous builds..."
+rm -rf dist
+
+# Build Linux version
+log "Building Linux version..."
+bun run build:linux || error "Linux build failed"
+npm install || error "npm install failed"
+
+# Build macOS version using Docker
+log "Building macOS version..."
+docker run --rm -it \
+    -v "${PWD}:/project" \
+    -v "${HOME}/.ssh:/root/.ssh" \
+    -v /var/run/docker.sock:/var/run/docker.sock \
+    electronuserland/builder \
+    /bin/bash -c "npm install && npm run build:mac" || error "macOS build failed"
+
+# Output paths
+VERSION=$(node -p "require('./package.json').version")
+log "Build complete! 🎉"
+echo "📦 Build artifacts:"
+echo "🐧 Linux AppImage: ./dist/Eve-${VERSION}.AppImage"
+echo "🐧 Linux Flatpak: ./dist/Eve-${VERSION}.flatpak"
+echo "🍎 macOS ZIP: ./dist/Eve-${VERSION}-mac.zip"