chore(deps): bump immutable from 5.1.5 to 5.1.9 in /frontend

[dependabot]

Bumps immutable from 5.1.5 to 5.1.9.

Release notes

Sourced from immutable's releases.

v5.1.9

What's Changed

• fix(List): preserve undefined values when grown past 32 elements by @​spokodev / @​jdeniau in immutable-js/immutable-js#2235 (originated from immutable-js/immutable-js#2230 )

Full Changelog: immutable-js/immutable-js@v5.1.8...v5.1.9

v5.1.8

What's Changed

• fix(List): guard oversized bounds in setListBounds. Fixes CVE GHSA-v56q-mh7h-f735
• perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE GHSA-xvcm-6775-5m9r

Full Changelog: immutable-js/immutable-js@v5.1.7...v5.1.8

v5.1.7

What's Changed

• fix(Repeat): lastIndexOf returned size instead of size - 1 by @​chatman-media in immutable-js/immutable-js#2227

internal

• Backport tests from 6.x branch by @​jdeniau in immutable-js/immutable-js#2199
• fix(IndexedCollection): has(index) on a lazy Seq of unknown size now checks index existence instead of searching for a value equal to the index by @​jdeniau in immutable-js/immutable-js#2203
• Better type for reduce if not ininitial value is given by @​jdeniau in immutable-js/immutable-js#2205
• Backport test from #2193 by @​jdeniau in immutable-js/immutable-js#2207
• backport tests from 6.x by @​jdeniau in immutable-js/immutable-js#2213
• Firefox link to non-French page by @​jdeniau in immutable-js/immutable-js#2219
• Bump esbuild and @​size-limit/preset-small-lib by @​dependabot[bot] in immutable-js/immutable-js#2217
• backport tests from #2210 by @​jdeniau in immutable-js/immutable-js#2214
• Bump shell-quote from 1.8.2 to 1.8.4 by @​dependabot[bot] in immutable-js/immutable-js#2211
• Bump @​tootallnate/once from 2.0.0 to 2.0.1 by @​dependabot[bot] in immutable-js/immutable-js#2190
• Bump minimatch from 9.0.5 to 9.0.9 by @​dependabot[bot] in immutable-js/immutable-js#2189
• Bump @​codemirror/theme-one-dark from 6.1.2 to 6.1.3 by @​dependabot[bot] in immutable-js/immutable-js#2168
• Bump form-data from 4.0.5 to 4.0.6 by @​dependabot[bot] in immutable-js/immutable-js#2220
• Bump typescript-eslint from 8.33.0 to 8.61.1 by @​dependabot[bot] in immutable-js/immutable-js#2222
• Bump @​rollup/plugin-commonjs from 28.0.2 to 29.0.3 by @​dependabot[bot] in immutable-js/immutable-js#2224

New Contributors

• @​chatman-media made their first contribution in immutable-js/immutable-js#2227

Full Changelog: immutable-js/immutable-js@v5.1.6...v5.1.7

v5.1.6

What's Changed

• fix(reverseFactory): read reversedSequence.size in __iterator instead of this by @​jdeniau in immutable-js/immutable-js#2196

... (truncated)

Changelog

Sourced from immutable's changelog.

5.1.9

• fix(List): a List grown past 32 elements while all its values are undefined no longer reads those values back as null (affected get, iteration, toArray, equals and hashCode)

5.1.8

• fix(List): guard oversized bounds in setListBounds. Fixes CVE GHSA-v56q-mh7h-f735
• perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE GHSA-xvcm-6775-5m9r

4.3.9

• fix(List): guard oversized bounds in setListBounds. Fixes CVE GHSA-v56q-mh7h-f735
• perf(Map): index large hash-collision buckets for faster lookups. Fixes CVE GHSA-xvcm-6775-5m9r

5.1.7

• fix(Repeat): lastIndexOf returned size instead of size - 1 by @​chatman-media in immutable-js/immutable-js#2227. Fixes CVE CVE-2026-29063
• fix(IndexedCollection): has(index) on a lazy Seq of unknown size now checks index existence instead of searching for a value equal to the index #2203
• [TypeScript]: reduce/reduceRight without an initial value now infer the result type from the collection's values when the reducer returns a value (e.g. list.reduce((a, b) => a + b) infers number), matching Array#reduce. Previously an explicit type argument was required. #2205

5.1.6

• fix(reverseFactory): read reversedSequence.size in __iterator instead of this #2196

Commits

• 329f7a6 5.1.9
• 21fabd9 changelog
• 009164f Merge pull request #2235 from immutable-js/fix/avoid-null-when-setsize33
• 5b65bfb fix(List): preserve undefined values when grown past 32 elements
• 50bf39e Update CHANGELOG.md for versions 5.1.8 and 4.3.9
• 6496539 5.1.8
• 808a83a Merge commit from fork
• e51d49f perf(Map): index large hash-collision buckets for faster lookups
• 25c58b0 fix typescript in tests
• a1a1ee4 Merge commit from fork
• Additional commits viewable in compare view

[cursor]

PR Summary

Low Risk
Dependency version change only in the lockfile; risk is limited to transitive immutable behavior used by build tooling (sass), with net effect likely positive due to security fixes.

Overview
Updates the lockfile so immutable resolves to 5.1.9 (from 5.1.5) under frontend; it remains a transitive dependency (e.g. via sass), with no application source changes.

That jump includes upstream List correctness fixes (including preserving undefined when a list grows past 32 elements) and security/performance fixes from intermediate releases (bounds handling on lists, hash-collision bucket indexing on maps, and related CVE advisories noted in the release notes).

^{Reviewed by Cursor Bugbot for commit 746607c. Bugbot is set up for automated code reviews on this repo. Configure here.}

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