chore: upgrade React experimental to 0.0.0-experimental-1b45e243-20260402

[react-server-bot]

Automated daily upgrade of React packages to the latest experimental version.

Previous version: 0.0.0-experimental-46103596-20260305
New version: 0.0.0-experimental-1b45e243-20260402

Updated locations

• packages/react-server/package.json — react, react-dom, react-is, react-server-dom-webpack
• package.json — all pnpm.overrides for React
• docs/ — micro-frontends MDX (en + ja) esm.sh URLs
• pnpm-lock.yaml

Smoke test

• Dev mode — hello world test passed ✅
• Build+start mode — hello world test passed ✅

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Status	Name	Latest Commit	Updated (UTC)
✅ Deployment successful! View logs	react-server-docs	91e47f9	Apr 06 2026, 06:40 AM

[github-actions]

⚡ Benchmark Results

	PR 91e47f9	main 40687e7
Config	50 connections, 10s/test	50 connections, 10s/test

Benchmark	Req/s	vs main	Avg Latency	vs main	P99 Latency	Throughput
minimal	396	🔴 -1.6%	125.18 ms	🔴 +1.3%	201 ms	2.0 MB/s
small	421	🔴 -2.6%	118.15 ms	🔴 +3.4%	154 ms	2.5 MB/s
medium	187	🔴 -4.3%	263.93 ms	🔴 +4.8%	403 ms	8.3 MB/s
large	26	⚪ 0.0%	1792.83 ms	⚪ +0.4%	4275 ms	8.6 MB/s
deep	321	🔴 -2.4%	153.55 ms	🔴 +2.1%	221 ms	4.6 MB/s
wide	32	🔴 -8.0%	1385.8 ms	🔴 +1.1%	2929 ms	7.1 MB/s
cached	3124	⚪ -0.7%	15.51 ms	⚪ +0.5%	32 ms	138.7 MB/s
client-min	461	🔴 -2.7%	107.4 ms	🔴 +2.4%	157 ms	2.1 MB/s
client-small	461	🔴 -3.3%	107.34 ms	🔴 +3.0%	143 ms	2.3 MB/s
client-med	356	⚪ -0.9%	138.76 ms	⚪ +0.8%	200 ms	6.7 MB/s
client-large	84	🔴 -5.8%	566.78 ms	🔴 +4.6%	1049 ms	8.9 MB/s
client-deep	441	🔴 -2.2%	112.45 ms	🔴 +2.1%	153 ms	3.3 MB/s
client-wide	136	🔴 -9.0%	358.36 ms	🔴 +9.8%	656 ms	8.0 MB/s
static-json	6442	🔴 -8.1%	7.11 ms	🔴 +9.4%	17 ms	2.7 MB/s
static-js	7059	🔴 -3.6%	6.47 ms	🔴 +3.4%	16 ms	8.4 MB/s
404-miss	5124	🟢 +2.2%	9.24 ms	🟢 -1.9%	19 ms	0.6 MB/s

Legend

🟢 > 1% improvement | 🔴 > 1% regression | ⚪ within noise margin

Benchmarks run on GitHub Actions runners (shared infrastructure) — expect ~5% variance between runs. Consistent directional changes across multiple routes are more meaningful than any single number.

[codecov-commenter]

❌ 2 Tests Failed:

Tests completed	Failed	Passed	Skipped
916	2	914	0

View the top 2 failed test(s) by shortest run time

__test__/apps/mantine.spec.mjs > __test__/apps/mantine.spec.mjs

Stack Traces | 240s run time

Error: Hook timed out in 240000ms.
If this is a long-running hook, pass a timeout value as the last argument or configure it globally with "hookTimeout".
 ❯ __test__/apps/mantine.spec.mjs:13:10

__test__/deno.spec.mjs > preset: router

Stack Traces | 300s run time

Error: Hook timed out in 300000ms.
If this is a long-running hook, pass a timeout value as the last argument or configure it globally with "hookTimeout".
 ❯ __test__/deno.spec.mjs:46:18

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