fix: address latest CodeRabbit review round

backlog/completed/task-243 - Assess-and-address-PR-36-latest-CodeRabbit-review-round.md

@@ -0,0 +1,35 @@
+---
+id: TASK-243
+title: 'Assess and address PR #36 latest CodeRabbit review round'
+status: Done
+assignee: []
+created_date: '2026-03-29 07:39'
+updated_date: '2026-03-29 07:41'
+labels:
+  - code-review
+  - pr-36
+dependencies: []
+references:
+  - 'https://github.com/ksyasuda/SubMiner/pull/36'
+priority: high
+ordinal: 3600
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Inspect the latest CodeRabbit review round on PR #36, verify each actionable comment against the current branch, implement the confirmed fixes, and verify the touched paths.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 Confirmed review comments are implemented or explicitly deferred with rationale.
+- [ ] #2 Touched paths are verified with the smallest sufficient test/build lane.
+- [ ] #3 Current PR feedback is reduced to resolved or intentionally deferred suggestions.
+<!-- AC:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+Addressed the confirmed latest CodeRabbit review items on PR #36. `scripts/run-coverage-lane.ts` now uses the Bun-style `import.meta.main` entrypoint check with a local ts-ignore to preserve the repo's CommonJS typecheck settings. `src/core/services/immersion-tracker/maintenance.ts` no longer shadows the imported `nowMs` helper in retention functions. `src/main.ts` now centralizes the startup-mode predicates behind a shared helper and releases `resolvedSource.cleanup` on the cached-subtitle fast path so materialized sources do not leak.
+<!-- SECTION:FINAL_SUMMARY:END -->