feat: Migrate to rsbuild 2.0

[zatteo]

See linagora/cozy-libs#3121

Summary by CodeRabbit

• Performance

  • Restored optimized code-splitting behavior to improve application loading and resource delivery.

• Maintenance

  • Updated build tooling for improved compatibility with modern JavaScript features.
  • Added support for generating build performance reports in CI environments.

[bundlemon]

BundleMon

Files updated (12)

Status	Path	Size	Limits
✅	static/resource/(hash).js	336.94KB (+871B +0.25%)	-
✅	public/index.html	745B (-11B -1.46%)	-
✅	index.html	826B (-13B -1.55%)	-
✅	static/css/public.(hash).css	2.72KB (-42B -1.48%)	-
✅	static/js/lib-router.(hash).js	21.86KB (-68B -0.3%)	-
✅	static/js/lib-react.(hash).js	43.8KB (-83B -0.18%)	-
✅	static/js/lib-polyfill.(hash).js	22.37KB (-401B -1.72%)	-
✅	static/js/intents.(hash).js	17.18KB (-534B -2.95%)	-
✅	static/js/public.(hash).js	27.95KB (-773B -2.63%)	-
✅	static/js/main.(hash).js	58.38KB (-1023B -1.68%)	-
✅	services/dacc.js	2.16KB (-255.72KB -99.16%)	-
✅	services/qualificationMigration.js	2.45KB (-275.32KB -99.12%)	-

Unchanged files (4)

Status	Path	Size	Limits
✅	static/css/main.(hash).css	8.25KB	-
✅	manifest.webapp	6.06KB	-
✅	intents/index.html	668B	-
✅	assets/manifest.json	185B	-

Total files change -533.07KB -49.11%

Groups updated (3)

Status	Path	Size	Limits
✅	**/*.{png,svg,ico}	2.19MB (+28.22KB +1.28%)	-
✅	**/*.css	67.91KB (+37B +0.05%)	-
✅	**/*.js	5.55MB (-278.66KB -4.68%)	-

Final result: ✅

View report in BundleMon website ➡️

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Current branch size history | Target branch size history

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: 211fa0aa-20c8-4cc6-98a6-f9565c72348a

📥 Commits

Reviewing files that changed from the base of the PR and between d3ac04f and fb924c8.

⛔ Files ignored due to path filters (1)

• yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (2)

• package.json
• rsbuild.config.mjs

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.

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Walkthrough

The change upgrades @rsbuild/core and rsbuild-config-cozy-app, removes the @rsdoctor/rspack-plugin dependency, and adds core-js. The web environment now uses inherited chunk-splitting behavior. When RSDOCTOR_CI is set, the configuration enables RsdoctorRspackPlugin and writes a brief JSON report to the project root.

Priority: ⬇️ Low

Change: Other

Merge Risk: ⚪ Minimal · up to fb924

The build-toolchain update has no supported current-head issue requiring changes before merge.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: migrating the project to Rsbuild 2.0.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/rsbuild-2

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[codescene-delta-analysis]

Gates Passed
3 Quality Gates Passed

See analysis details in CodeScene

Quality Gate Profile: The Bare Minimum
Install CodeScene MCP: safeguard and uplift AI-generated code. Catch issues early with our IDE extension and CLI tool.

[github-actions]

Rsdoctor Bundle Diff Analysis

📊 Quick Summary

Project	Total Size	Gzip Size	Change	Gzip Change
rsdoctor-data.json	32.6 MB	8.7 MB	-123.4 KB (-0.4%)	-25.8 KB (-0.3%)

📋 Detailed Reports (Click to expand)

📁 rsdoctor-data.json

Path: rsdoctor-data.json

📌 Baseline Commit: fcf05b6c987b8b5c117483f5af1decc487f7eda7 | PR: #4197

Metric	Current	Baseline	Change
📊 Total Size	32.6 MB	32.8 MB	-123.4 KB (-0.4%)
🗜️ Gzip Size	8.7 MB	8.8 MB	-25.8 KB (-0.3%)
📄 JavaScript	18.2 MB	18.3 MB	-151.7 KB (-0.8%)
🎨 CSS	368.9 KB	368.8 KB	+95.0 B (0.0%)
🌐 HTML	6.3 KB	6.3 KB	-60.0 B (-0.9%)
📁 Other Assets	14.1 MB	14.1 MB	+28.2 KB (0.2%)

📦 Download Diff Report: rsdoctor-data.json Bundle Diff

Generated by Rsdoctor GitHub Action