fix(coding-agent): settle aborting retrying goal turns

[code-yeongyu]

Summary

Fixes abort handling for active goal continuations after retry/error states. The retry abort controller is now ready before auto_retry_start is emitted, so an immediate Esc/session abort can cancel the retry sleep instead of leaving the UI in a working state.

Changes

• Create retry abort controller before publishing auto_retry_start.
• Stop active goal continuation from queuing another hidden follow-up when the last assistant turn ended as aborted or error.
• Split goal command/tool registration out of the large goal extension module.
• Add focused regressions for aborted/error goal agent_end and an e2e retry-abort goal turn.

Verification

• npx tsx ../../node_modules/vitest/dist/cli.js --run test/suite/goal-e2e.test.ts test/suite/goal-extension.test.ts test/suite/goal-modules.test.ts test/suite/agent-session-queue.test.ts test/suite/agent-session-retry-events.test.ts
  Evidence: local-ignore/qa-evidence/20260621-abort-esc-after-retry-refresh/focused-tests.txt
• npm run check
  Evidence: local-ignore/qa-evidence/20260621-abort-esc-after-retry-refresh/npm-run-check-final.txt
• senpi QA common/RPC/mock-loop/TUI:
  • node .agents/skills/senpi-qa/scripts/lib/common.mjs --self-check
  • node .agents/skills/senpi-qa/scripts/rpc-drive.mjs --self-test
  • node .agents/skills/senpi-qa/scripts/mock-loop.mjs --self-test
  • node .agents/skills/senpi-qa/scripts/tui-smoke.mjs --self-test
    Evidence: local-ignore/qa-evidence/20260621-abort-esc-after-retry-refresh/
• Manual QA matrix: local-ignore/qa-evidence/20260621-abort-esc-after-retry-refresh/manual-qa-matrix.md

Review

• review-work QA: PASS
• review-work code quality: PASS
• review-work security: PASS
• review-work context mining: PASS

---

Summary by cubic

Fixes immediate Esc cancellation during auto-retry and stops goal auto-continues after terminal turns, including when tool execution is aborted.

• Bug Fixes

  • Initialize the retry abort controller before emitting auto_retry_start, so Esc cancels the retry sleep immediately.
  • Queue a goal continuation after agent_end only when the last assistant turn ended cleanly; do not continue after aborted, error, or aborted tool results.

• Refactors

  • Moved goal command registration to command-registration.ts.
  • Moved goal tool registration to tool-registration.ts.

^{Written for commit c94307e. Summary will update on new commits.}