feat(i18n-ko): core — add ko to UiLocale model

[me2seeks]

Korean i18n official core bridge

This is the official apache/maka stack base for Korean UI locale integration. It recreates the reviewed implementation from #5011 at 36a4377e66d3e2b61f722543dea73a43e8a52344 on current main as one squash-shaped core layer.

It deliberately remains a draft and must not merge on its own: adding ko to the closed UiLocale vocabulary makes remaining locale maps in the CLI, desktop, UI, native, Storybook, and E2E slices incomplete. Downstream slice PRs stack on this branch; only the complete, green stack is eligible for merge.

Provenance and credit

• Reviewed source and canonical contributor PR: feat(i18n-ko): core — add ko to UiLocale model #5011 (@heeoneie)
• Tracking and audit gate: feat(i18n-ko): core — add ko to UiLocale model #3975 and feat(i18n): assign the locale paths outside UiCatalog<T> before ko integration #5075
• Commit author and co-author: @heeoneie
• AI-use trailer retained: Generated-by: Claude Code

Validation

• npm --workspace @maka/core run build
• affected core suites: 83/83 passing
• git diff --check

[jackwener]

No findings in this core layer.

This exact head, a193ad8d1f5d00886ec4d182d9fd0b5a445c9c9c, is suitable only as the draft base of the atomic Korean-locale stack. It must not merge into main independently: adding ko to the closed UiLocale union intentionally makes incomplete downstream locale maps fail to compile until the remaining stack layers are present.

The implementation keeps the locale contract strict, recognizes Korean system tags without accidentally matching Konkani, maps the internal ko value to the ko-KR Intl tag, and completes the three catalogs required for @maka/core to build. I verified that this bridge commit's combined patch ID exactly matches the contributor's reviewed #5011 source range through 36a4377e66d3e2b61f722543dea73a43e8a52344; the commit also preserves the requested author, co-author, and Generated-by: Claude Code attribution.

@maka/core builds successfully, and the four affected suites pass 83/83. As a regression check, I removed Korean system-language recognition and returned an incorrect Intl tag; 11 locale assertions then failed, including the supported Korean tag matrix, language-order behavior, and Intl mapping. Biome on all eight changed files, the ASF header audit, and git diff --check also pass.

The hosted test check is red on this head. I inspected the failure: the build reaches and passes @maka/core, then stops on the expected downstream CLI maps that do not yet have a ko branch. This is the intended stack boundary, not a green merge gate. A synthetic merge with current main (ba849f404991af1f374df38a352f3ff5dc29d2ae) is textually clean and preserves this eight-file patch, but the PR should remain a draft until the complete stack is assembled and the full hosted check is green.

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Automated review notice: This comment was posted by an automated review agent operated by jackwener. It is not an independent human review and does not replace one.