fix(cli): answer subagent asks in run and keep parallel rejections continuing - #52146

Type of change

• Bug fix

What does this PR do?

Two edge cases left opencode run stopping or hanging after #51968. Both were found with an opencode-drive edge-case matrix.

1. Parallel permission asks stopped the run (core). When one ask is rejected, Permission.reply also rejects every other pending ask in the session, always with a plain DeclinedError. So run's reject-with-feedback for the first ask still ended the step for the second:

! permission requested: read (.env); auto-rejecting
! permission requested: external_directory (/etc/*); auto-rejecting
Error: Session interrupted: shutdown
…
Error: The user declined this tool call

The other pending asks now get the same feedback (CorrectedError) when the rejection carries a message. They still get DeclinedError when it doesn't. This also fixes the TUI case where rejecting one ask with feedback while another is pending ended the turn.

2. Subagent asks hung the run forever (CLI). run only answered permission asks and forms for its own session ID. A subagent runs in a child session, so its ask was never answered and the run waited indefinitely. This predates #51968. run now also handles asks and forms from descendant sessions. It resolves the parentID chain once per session and caches it, so unrelated sessions on a shared server (for example the TUI's) are still left alone. Permission replies now use the asking session's ID.

How did you verify your code works?

• packages/cli: bun typecheck; bun test test/run is 11 pass / 0 fail.
• packages/core: bun typecheck; bun test test/permission.test.ts test/session-runner.test.ts is 325 pass / 0 fail.
• opencode-drive matrix (server and CLI from this branch, simulated LLM). All pass:
  • ask, ask retried ×3, --auto, deny
  • two asks in one step → both get feedback, model continues, exit 0 (was: exit 1)
  • subagent hits an ask → rejected with feedback, child finishes, parent answers, exit 0 (was: hang)
  • subagent hits two asks in one step → same, exit 0
  • unrelated session on the same server with a pending ask → still pending after run exits
• Together with feat(core): let form cancellation carry a message #52137 (question cancellation with a message), the full 19-case matrix passes, including question/ask mixes, --format json, and a subagent trying the question tool.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR