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
Lockfile-only dependency bump with no direct app usage; changes are upstream library fixes rather than project logic.

Overview
Updates the locked immutable package from 5.1.5 to 5.1.9 in frontend/package-lock.json (transitive via sass). No application source changes.

The newer release includes List/Map bug and security fixes (e.g. bounds handling and hash-collision bucket indexing in 5.1.8), a List fix for undefined values when grown past 32 elements in 5.1.9, and other patch-level behavior and TypeScript typing improvements from 5.1.6–5.1.7.

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