chore(main): release 0.4.0

[github-actions]

🤖 I have created a release beep boop

0.4.0 (2026-06-27)

Features

• add adhoc step tool (b43f93f)
• add parallel execution support for workflow steps (UI-only) (#36) (82753f9)
• add Playbook library (#26) (1cd6842)
• add rename workflow button (#22) (125fc6f)
• Add support for looping workflows (#23) (1804e91)
• add tools for managing workflow steps (add, edit, delete) (8998cad)
• Board view updates (#25) (becd27b)
• copy button on library playbook card (75fa634)
• delete task (cd3207d)
• exportable workflow, remove update tool (fd1d93d)
• new tool for adhoc requests related to a task, even after completion (dab9b9d)
• remove specs and standardize playbooks (#35) (b8f2cb4)

Bug Fixes

• add logo (f5f29d9)
• add status filter (73fd1a5)
• don't show progress notes on board view (#19) (0720fa3)
• font size (was too small) (#27) (d5efa81)
• handle missing description in task input specification (869dc8f)
• none edge by LLM (a59213a)
• Penguin UI style fixes (#28) (a1af7b7)
• progress notes layout (#24) (a301c51)
• remove duplicated content in output (82670cc)
• tighten MCP tool output hints (#18) (3fdcfc9)

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