perf: smooth hunt transitions

[slate-rehm]

Summary

• Reduce replay React updates to about 30 Hz.
• Memoize settled DAG lanes and use binary frame lookup.
• Remove unused per-chunk throughput and replay allocations.
• Remove full-screen dialog backdrop blur.
• Disable the implicit view-transition group animation.

Performance

A deterministic five-lane replay benchmark measured these changes:

• React updates: 120 to 60
• Lane renders: 600 to 60
• Replay JavaScript workload: 1,785.96 ms to 293.48 ms
• Processing replay client chunk: 1.92 kB to 1.47 kB

Checks

• pnpm test
• pnpm typecheck
• pnpm typecheck:tsc
• pnpm format:check
• pnpm lint
• pnpm build

CodeRabbit could not run because this environment has no API key. The build still reports the existing local Sentry token HTTP 401, but exits successfully.

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Release notes

• Replay updates now run at about 30 Hz.
• The replay memoizes settled DAG lanes.
• The replay uses binary frame lookup.
• The replay removes unused chunk throughput tracking and allocations.
• Dialog overlays no longer blur the page.
• The main view-transition group no longer animates.
• A five-lane benchmark shows fewer React updates, lane renders, and replay JavaScript work.
• The benchmark also shows a smaller replay client chunk.
• Tests, type checks, formatting, lint, and builds pass.
• The build reports an existing Sentry token HTTP 401 and exits successfully.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 609ea062-94b8-4c4e-948b-e925adcc2a76

📥 Commits

Reviewing files that changed from the base of the PR and between 8d7080c and 3445c06.

📒 Files selected for processing (8)

• src/components/ui/alert-dialog.tsx
• src/components/ui/dialog.tsx
• src/globals.css
• src/routes/-hunt/hunt-client.tsx
• src/routes/-hunt/processing-dag.tsx
• src/routes/-hunt/processing-replay-panel.tsx
• src/routes/-hunt/processing-step.tsx
• src/routes/-hunt/use-hunt-run.ts

💤 Files with no reviewable changes (1)

• src/routes/-hunt/hunt-client.tsx

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📝 Walkthrough

Walkthrough

The change removes throughput-bus and chunk replay tracking, updates replay timing and snapshot lookup, memoizes loading lanes, removes overlay backdrop blur, and disables animation for the ew-main view-transition group.

Changes

Hunt replay flow

Layer / File(s)	Summary
Frame-only replay capture src/routes/-hunt/use-hunt-run.ts	Replay data now contains progress frames and duration only. Run execution no longer tracks throughput data or passes chunk callbacks.
Replay playback and lane rendering src/routes/-hunt/processing-replay-panel.tsx, src/routes/-hunt/processing-dag.tsx, src/routes/-hunt/processing-step.tsx, src/routes/-hunt/hunt-client.tsx	Playback advances elapsed time with animation-frame deltas and uses binary search for snapshots. Processing lanes are memoized, and throughput-bus props are removed.

UI rendering styles

Layer / File(s)	Summary
Overlay and transition styling src/components/ui/alert-dialog.tsx, src/components/ui/dialog.tsx, src/globals.css	Overlay backdrop blur utilities are removed. The ew-main view-transition group no longer animates.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Sequence Diagram(s)

sequenceDiagram
  participant useHuntRun
  participant engine.run
  participant ProcessingReplayPanel
  participant ProcessingDag
  useHuntRun->>engine.run: capture progress frames
  useHuntRun->>ProcessingReplayPanel: provide frames and durationMs
  ProcessingReplayPanel->>ProcessingDag: update controlledNowMs

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the primary performance improvements to hunt replay and transitions.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	error-wolf	3445c06	Aug 01 2026, 03:40 AM