FE-1648: add select option to filter

[alex-e-leon]

🌟 What is the purpose of this PR?

Adds a new "select" option to that allows adding single or multi-selects as filter input types. Also tidies up various ui select/select adjacent components. Specifically:

• Add selection summary options to Select + better overflow handling inside the input for multiSelect
• Improves keyboard handling for Selects, overriding ark-ui's default focus-trapping while selects are open so that users can tab out of selects, maps some other Select keyboard shortcuts to be closer to APG guidelines, and adds better keyboard handling inside Filter
• Updates some Select + Input widths to correctly handle min/max + default widths at all container sizes/cases, including flex container variants.
• Improve alignment of header/footer/search/custom items inside SelectableList UI
• Simplified api pattern for searchable/clearable/etc updated across various components.

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• does not modify any publishable blocks or libraries, or modifications do not need publishing

📜 Does this require a change to the docs?

The changes in this PR:

• are internal and do not require a docs change

[cursor]

PR Summary

Medium Risk
Touches shared design-system form APIs (breaking prop shapes) and adds non-trivial Filter commit/keyboard and Select focus behavior that many product surfaces depend on.

Overview
Filter operators can now use single- and multi-select value inputs (including async item loaders and select-in-tuple operators), wired through a new naked Select segment with auto-open on operator pick, commit-on-close semantics, and left/right keyboard navigation across chip segments.

Select gains a naked variant for inline chrome-free triggers, overflow modes (scroll / truncate / summary) via a new OverflowRow primitive, searchable multi-select selection summary (count + select/clear all), and revised keyboard behavior (Tab through dropdown tabbables, Enter closes multi-select, Escape reverts session, no Left/Right changing value when closed).

Breaking-style API simplifications (minor @hashintel/ds-components): clearable / searchable on inputs and selects are now boolean | { callbacks… }; Banner.dismissible, Chip.removeable, and Filter.removeable use false | { on… } instead of nested enabled flags. SelectableList moves under util/ (public Item / ItemOrGroup re-export path changes); list padding tokens and header/footer/search alignment are retuned. Preset input/select widths flex more safely in narrow containers.

Call sites in hash-frontend supply-chain search and Petrinaut adopt clearable as a boolean.

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Project	Deployment	Actions	Updated
hash	Ready	Preview	Sep 10, 2026 7:18pm UTC
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petrinaut	Ready	Preview	Sep 10, 2026 7:18pm UTC
petrinaut-docs	Ready	Preview	Sep 10, 2026 7:18pm UTC

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[lunelson]

Looks really nice 👍🏼