[MarkusNeusinger]

Summary

• Production outage: since deps(npm): Bump vite from 8.0.16 to 8.1.6 in /app #12225 (Vite 8.0.16 → 8.1.6), every page on anyplot.ai renders blank. Rolldown 1.1.5 places its CJS-interop runtime helper in the app's theme chunk, which imports mui, while mui imports the helper back. The chunk cycle leaves the helper uninitialized: TypeError: t is not a function at assets/mui-*.js:1.
• Bumps vite to 8.3.5 (Rolldown 1.2.15), which emits the helper as a separate rolldown-runtime chunk with no imports, so the cycle is gone. manualChunks and native codeSplitting.groups cannot steer the runtime module (it is never offered to group matchers), so a config-only fix wasn't possible on 8.1.6.
• Deduplicates yarn.lock so vitest's vite@^6 || ^7 || ^8 range resolves to the same 8.3.5 instead of keeping 8.1.6.

Test plan

• Reproduced the crash against prod with headless Chromium (/, /scatter-basic, /gain-curve all blank with the page error above).
• Reproduced locally with vite build on 8.1.6: mui → theme → mui import cycle in dist/assets.
• vite build on 8.3.5: mui and vendor import only rolldown-runtime, no cycle; vite preview of /gain-curve boots the app with no page error.
• tsc --noEmit passes.
• vitest run: 1166/1168 pass; the 2 failures (fileText.test.ts, windows-1252 decoding) fail identically on main in this container (Node 22.22.0, below the jsdom engine range), so they are environmental, not from this change.

Checklist

• changelog.d/vite-runtime-chunk-cycle.md added
• Related documentation updated — not needed, no behavior change beyond the fix

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Generated by Claude Code

[Copilot]

🟢 Approval recommended

The dependency changes are internally consistent, the reported build and browser checks support the fix, and no blocking issues were identified.

No open issues 🎉

What changed in this PR

Updates the frontend build dependencies to fix the blank-page regression introduced by #12225, without changing application code or chunk configuration.

Changes:

• Bumps Vite from 8.1.6 to 8.3.5, bringing in Rolldown 1.2.15 to eliminate the runtime-helper chunk cycle.
• Keeps the app and Vitest on the same locked Vite version and updates related dependencies.
• Adds a changelog entry explaining the outage and fix.

File	Description
changelog.d/​vite-runtime-chunk-cycle.md	Documents the blank-page regression and its resolution.
app/​yarn.lock	Locks the updated Vite, Rolldown, and related dependencies.
app/​package.json	Pins Vite to 8.3.5.

_{Review effort: Balanced}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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