Construct v0.2.0

Construct v0.2.0\n\nThis is a public pre-release for testing. The desktop installers are not yet signed with trusted developer certificates.\n\n## Desktop downloads\n\n- macOS Apple Silicon: Construct_0.2.0_aarch64.dmg\n- macOS Intel: Construct_0.2.0_x64.dmg\n- Windows x64: Construct_0.2.0_x64-setup.exe\n\n## Standalone CLI downloads\n\n- macOS Apple Silicon: construct_0.2.0_aarch64-apple-darwin.tar.gz\n- macOS Intel: construct_0.2.0_x86_64-apple-darwin.tar.gz\n- Windows x64: construct_0.2.0_x86_64-pc-windows-msvc.zip\n- Linux x64: construct_0.2.0_x86_64-unknown-linux-gnu.tar.gz\n\nDownload SHA256SUMS and verify the artifact before installation. On macOS or Linux, run: shasum -a 256 -c SHA256SUMS. On Windows, compare Get-FileHash output with the corresponding SHA256SUMS entry.\n\n## Highlights\n\n- Bundled JetBrains Mono for application chrome and Source Serif 4 for long-form Markdown reading.\n- Improved Source editor text, cursor, active-line, and selection contrast in light and dark themes.\n- Responsive OKF Graph that fills the available workspace height.\n- Warp support on macOS and Windows, plus a Windows system-default terminal fallback.\n- Fixed Ghostty opening on macOS through the supported native launch path.\n\n## Preview limitations\n\n- macOS builds use ad-hoc signing and are not notarized. Gatekeeper may require manual confirmation before opening.\n- The Windows installer is unsigned. Microsoft Defender SmartScreen may display a warning.\n- Linux ships the standalone CLI only.\n- Automatic updates remain disabled until signed release identity and rollback behavior are established.\n\nFull changelog: v0.1.9...v0.2.0