feat: strengthen chatloop continuation flow

[RexWzh]

Summary

• strengthen chatloop into a PRD-aware continuation loop: bootstrap always injects the PRD contract, continuation reuses an auto-loop style state machine, and completion now requires structured progress plus a validated STATUS: COMPLETE / <complete>DONE</complete> pair
• improve ChatLoop observability and UX with .opencode/chatloop.events.log, stronger status/debug output, toast feedback for activation / continuation / rejected completion / max-iterations / pause, and cleanup of the legacy file-plugin config entry
• install ChatLoop as a full global local plugin package under OpenCode home, add the chatloop-from-auto-loop design write-up, update setup/workspace docs, bump ChatTool to 6.6.2, and extend setup workspace to generate reference/, docs/themes/, and a workspace-maintenance skill for periodic workspace cleanup

Testing

• pytest tests/code-tests/test_setup_nodejs.py tests/mock-cli-tests/opencode/test_chattool_setup_opencode_basic.py tests/mock-cli-tests/setup/test_chattool_setup_workspace_mock_basic.py tests/cli-tests/setup/test_chattool_setup_workspace_real_basic.py
• pytest tests/mock-cli-tests/opencode/test_chattool_setup_opencode_basic.py tests/mock-cli-tests/opencode/test_chattool_setup_opencode_install_only.py tests/mock-cli-tests/setup/test_chattool_setup_workspace_mock_basic.py tests/cli-tests/setup/test_chattool_setup_workspace_real_basic.py tests/code-tests/test_setup_nodejs.py
• real OpenCode verification with a temporary PRD project confirmed bootstrap prompt injection, state/event logging, one successful continuation cycle, and valid completion cleanup in a long-lived session

Notes

• opencode run is still not a reliable environment for validating multi-iteration continuation or max-iteration behavior because the instance disposes immediately after the first idle; TUI or attach-style sessions remain the correct validation path for those behaviors
• the generated workspace scaffold now distinguishes active projects/, cross-project reusable reference/, and long-lived conventions under docs/themes/ so periodic cleanup can happen without overloading active project directories

[github-actions]

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