[adulau]

Large graphs introduced in #54 run force-layout warmup synchronously on the browser's main thread, which can freeze input and rendering. This follow-up addresses Codex's review feedback.

Enable Pivotick's embedded simulation worker. Configure one warmup tick, a 250 ms cooldown, and faster alpha decay so the main-thread fallback remains short when browser policy blocks workers. Alpha decay also limits v2.0.1's separate cooling stage; reducing warmup ticks alone would leave that stage running. Update the vendored-asset documentation to describe the worker and fallback behavior.

Validation:

• Full pytest suite: 71 passed.
• Chromium with the actual bundle and a 200-node/400-edge graph at 4× CPU throttling: verified worker completion, rendering, record inspection, theme switching, and fit controls; repeated with CSP blocking workers to verify fallback.
• In that run, the longest measured browser timer gap decreased from 3.48 s to 0.86 s with the worker (0.92 s with workers blocked). Fallback execution decreased from 1.80 s to 0.31 s. These are measurements from the test environment, including rendering work.
• Existing Chromium smoke checks passed for lazy loading, safe labels, selection, zoom/fit, themes, reopening, mobile resizing, and retry.
• JavaScript syntax and whitespace checks passed.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-13T05:19:45.701157Z	3e9a8b8	PR opened
🔒 Security Review	✅ Completed 2026-10-13T05:19:21.890137Z	3e9a8b8	PR opened

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