v0.4.0

Changelog

• 45e1e62 ci: skip docs-only changes
• f8cb78b docs: polish readme flow
• f39e847 docs: streamline readme authoring flow
• 7eee3a7 docs: highlight agent-friendly authoring
• 4ea5751 docs: add bug rescue showcase
• afbf9f1 docs: streamline readme structure
• 2523f98 docs: align run output artifact descriptions
• 90b6056 docs: add skill version guidance
• 16eb454 feat(cli): open cached run reports in view
• 938a836 docs: showcase trajectory visualization
• a9ee4ea build: add local install target
• 55cf104 docs: clarify jeju install paths for agents
• 859b27e docs: add agent authoring skill guidance