Lisa v0.7.0

What's Changed

• docs(marketing): regenerate pitch + Show HN for v0.6.0 by @oratis in #36
• feat(island): visual polish — glass depth, time chips, diff-style activity cards by @oratis in #37
• Orchestrator O5: signal_agent (list + cancel dispatched agents) + register the dead orchestration tools by @oratis in #38

Full Changelog: v0.6.1...v0.7.0