Blackcrab v0.2.0

See the attached installers and updater artifacts.

What's Changed

• Harden local builds and auth diagnostics by @BonJenn in #97
• Extract diagnostics helpers and add auth recheck loop for Claude onboarding by @BonJenn in #98
• Phase 2 hardening for diagnostics and native smoke by @BonJenn in #104
• Harden session ownership and metadata paths by @BonJenn in #105
• Improve IPC and terminal error visibility by @BonJenn in #106
• Add frontend reliability tests by @BonJenn in #107
• Update Tauri Rust dependencies by @BonJenn in #108
• Update marked dependency by @BonJenn in #109
• Update GitHub Actions versions by @BonJenn in #110
• Update TypeScript dependency by @BonJenn in #111

Full Changelog: v0.1.3...v0.2.0