⚡ Bolt: String.padStart() 제거를 통한 렌더링 성능 최적화

[seonghobae]

Superseded/rejected after current-head reconciliation.

The two modulepreload additions already overlap the focused editor-validation lane (#468), so they are not unique value here. The only remaining unique delta is replacing three String(...).padStart(2, '0') calls with ternary concatenation.

That micro-optimization has no production-browser benchmark or before/after evidence, no realistic regression proving a buyer-visible bottleneck, and no CHANGELOG/doctoring/acceptance record. The PR body asserts reduced allocation/JS↔C++ overhead and improved TTI without measuring either. ScopeWeave already has a dedicated measured 5,000-row rendering-performance lane (#495/#409); speculative hot-path substitutions should not bypass that evidence contract.

No source from this branch is being preserved: the duplicated preload behavior remains owned by #468, and the unbenchmarked date-padding rewrite is intentionally rejected rather than copied into a commercial-quality branch.

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Reviewing files that changed from the base of the PR and between b88e66e and 5f3f881.

📒 Files selected for processing (3)

• .jules/bolt.md
• app.js
• index.html

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