fix(playground): bump main entrypoint chunk-size limit 1800 → 1850 KB

[AztecBot]

What

Bumps the hard chunk-size cap on the playground's main entrypoint chunk (assets/index-*.js) in playground/vite.config.ts from 1800 KB → 1850 KB, plus a bump-log entry.

Why

The merge-train/barretenberg PR (#23137) is repeatedly failing in the merge queue on a deterministic yarn build failure in playground/:

❌ Chunk size validation failed:
  ❌ assets/index-Bc65D_YP.js: 1801.31 KB exceeds limit of 1800 KB (Main entrypoint, hard limit)
error during build: Error: Build failed: chunk size limits exceeded

(merge-queue log: ci.aztec-labs.com/a34536031aaca0b9)

The 1800 KB limit was only raised four days ago (#23107, 1750 → 1800). The merge train bundles further bb-side changes on top of next — notably feat: multi-app kernel circuits (#23076) — which nudged bb.js ~1.3 KB past the just-raised ceiling. It will fail on every queue attempt until the cap is raised. 1850 KB restores a small amount of headroom.

Note

This lands the bump on next. To unblock #23137 immediately, next needs to be re-merged into merge-train/barretenberg once this merges (or the same one-liner can be applied directly on that branch — note that branch's earlier conflict resolution dropped one of the two => 1800 bump-log comment lines, so expect a trivial conflict on the comment block when re-merging).

No behavior change; CI build only.

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Created by claudebox · group: slackbot