luci-base: add member keep_order to MultiValue

[muink]

Pull request details

Description

Add member keep_order to MultiValue.

Allow MultiValue widgets to preserve user selection order.

When enabled, selected values are saved in user selection order instead of choice order.

By default, keep_order is false and existing behavior is unchanged. When true, values are saved in the order they were selected by the user.

Screenshot or video of changes (if applicable)

Maintainer (preferred)

@systemcrash @hnyman

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Tested on

OpenWrt version: OpenWrt 25.12.4 (r32933-4ccb782af7)
LuCI version: openwrt-25.12 branch (26.164.56110~44618b5)
Web browser(s):

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Checklist

• This PR is not from my main or master branch 💩, but a separate branch. ✅
• Each commit has a valid ✒️ Signed-off-by: <my@email.address> row (via git commit --signoff).
• Each commit and PR title has a valid 📝 <package name>: title first line subject for packages.
• Incremented 🆙 any PKG_VERSION in the Makefile.
• (Optional) Includes what Issue it closes (e.g. openwrt/luci#issue-number).
• (Optional) Includes what it depends on (e.g. openwrt/packages#pr-number in sister repo).

[openwrt-ai]

Reviewed 1 new commit; no commit-message issues found. One inline note on missing API documentation for the new keep_order member.

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Generated by Claude Code

[openwrt-ai]

Reviewed 1 new commit; no new issues found.

The only change since the last review adds the keep_order JSDoc @member block on CBIMultiValue, which resolves the previously raised documentation note.

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Generated by Claude Code

[openwrt-ai]

Reviewed 1 new commit; no new issues found.

The head SHA changed since the last review, but the branch was only rebased onto a newer master; the PR's own changes to form.js and ui.js are byte-identical to the previously reviewed state.

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Generated by Claude Code