📦(frontend) setup browserlist and support chrome >= 109

[jbpenrath]

Purpose

Some of our users has reported issues using the application with Chrome 109. Instead of polyfilling one by one each method, we setup vite legacy plugin and configured a browserlist. It adds a 23.5Kb Gzipped module but the polyfill strategy management is more standard and robust.

Then with the upgrade to vite 8.1.5 we save ~400kb (~125kb gzipped) on the global bundle size 😉

Close #741

Summary by CodeRabbit

Summary by CodeRabbit

• New Features

  • Improved browser compatibility via automatic runtime polyfills for modern builds, aligned to the supported Chrome/Edge baseline.

• Improvements

  • Refreshed the frontend build tooling and browser targeting rules to match the supported audience.
  • Updated build minification for faster, more efficient production output.

• Chores

  • Updated development dependencies to newer Vite tooling.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: b97bf587-29e0-4123-aaa1-767103ccbe6f

📥 Commits

Reviewing files that changed from the base of the PR and between b2ed3a7 and a65797d.

⛔ Files ignored due to path filters (1)

• src/frontend/package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (2)

• src/frontend/package.json
• src/frontend/vite.config.ts

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📝 Walkthrough

Walkthrough

The frontend adds Browserslist targets, updates Vite tooling, enables runtime polyfills through the legacy plugin, disables legacy chunks, and switches build minification to Oxc.

Changes

Frontend browser targeting

Layer / File(s)	Summary
Browser target and toolchain configuration src/frontend/package.json	Adds @vitejs/plugin-legacy, updates Vite to 8.1.5, and defines supported browser targets with exclusions.
Vite compatibility and minification src/frontend/vite.config.ts	Reads the package browser targets, enables modern runtime polyfills through the legacy plugin, disables legacy chunks, and sets minification to oxc.

Estimated code review effort: 2 (Simple) | ~10 minutes

Suggested reviewers: sylvinus

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The compatibility fix is addressed via plugin-legacy/Browserslist, but the linked issue's requested shims, tests, and changelog update are not shown.	Add the four Array.prototype shims before BlockNote, include the requested tests, and update the changelog, or explain why the approach differs.

✅ 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 is concise and matches the main frontend browser-compatibility change, despite the minor spelling error.
Out of Scope Changes check	✅ Passed	The changes stay focused on frontend browser compatibility and Vite configuration; no unrelated code changes are evident.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/frontend/vite.config.ts`:
- Around line 11-13: Replace the synchronous readFileSync/JSON.parse logic used
to initialize browserslist in vite.config.ts with a direct package.json import,
relying on the existing resolveJsonModule setting. Preserve the browserslist
string[] typing and remove the now-unused filesystem/path dependencies if
applicable.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: fc0b8b84-0702-4dbe-8537-6fcd9053e36c

📥 Commits

Reviewing files that changed from the base of the PR and between 39f2d9c and 19caabf.

⛔ Files ignored due to path filters (1)

• src/frontend/package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (2)

• src/frontend/package.json
• src/frontend/vite.config.ts

[jbpenrath]

@sylvinus I know that keeping bundle size as small as possible is important for you. So before merging that, I would like to know if you are ok to increase a little bit the bundle size (~66kb / 23.5kb gziped) in favor of maintanability and support of some "old" browsers.

[sylvinus]

@jbpenrath ok for me. Shouldn't we also add a target minimum firefox version? I think @lebaudantoine knows which version some ministries are pinned at, which could be a good floor?

[sylvinus]

Also do we have a clean message in case of non-support for older browsers?