[viralcodex]

Fix

A retry with explicit shutdown: false must not retry an earlier power-off request. Preserve previous shutdown intent only when the retry omits the flag. This lets callers finish cleanup without another shutdown attempt.

Verification

• Extended the existing close/reopen transition table with explicit detach, rather than adding duplicate setup.
• The new case failed before the fix and passes after it.
• release:check passes with 297 tests and one existing Bun-only skip.
• Controller and native lifecycle suites pass three repeated runs.
• Rebuilt the GUI bundle and updated the v0.4.0 release notes.

Final corrective PR before publishing the already-prepared v0.4.0 release.

[viralcodex]

Reviewed the three shutdown-policy transitions: omitted flag preserves prior intent, reopening finishes prior cleanup, and explicit false suppresses another shutdown attempt. The regression case failed before the fix. Exact-tree local release checks and Linux CI now pass with 297 tests and one existing skip: https://github.com/viralcodex/opencode-demul/actions/runs/42034990622.