GeezerVison

Grouping. The batch label text-spacing-cut-off had three eligible tickets with two root causes. DEQ-365 and DEQ-430 come from the shared SelectFilter/ComboboxButton and are fixed here. DEQ-434 comes from StaticWidth in agent metadata and is fixed in #32055.

Revision. The first version wrapped the trigger label onto several lines. A human reviewer rejected that, so the trigger now truncates on one line and shows a tooltip, with a little more width.

Tooltip details.

• The tooltip is a controlled Radix Tooltip, and onOpenChange compares the label's scrollWidth to its clientWidth.
• The trigger combines the popover trigger and the tooltip trigger, both rendered asChild. The popover's data-state and aria-expanded win, so the chevron still rotates. I verified this in the browser.
• The tooltip opens on focus as well as hover. Escape and moving the pointer onto it work as WCAG 1.4.13 requires, through the Radix defaults.

Verification.

• I injected the WCAG spacing stylesheet into Storybook (pages/AuditPage MultiOrg, pages/AIBridgePage/ListSessionsFilter Default) and listed elements whose scrollWidth exceeded clientWidth. On main, "All providers", "All resource types" and "All organizations" are clipped. On this branch, nothing is clipped and every trigger stays 40px tall.
• A truncated label shows its tooltip on hover and on focus. A label that fits gets none, with or without spacing.
• New Vitest cases check that the focused trigger's accessible description is the full label when it's truncated, and empty when it fits.
• The new LongLabelTooltip story gives Pixel the tooltip-open state.

Accessibility audit (axe 4.11, WCAG A/AA and best practices). No new violations. aria-dialog-name on the popover already fails on main, and this diff doesn't touch it.

Review findings.

• Applied: keep the tooltip closed while the popover is open (should-fix), and split a conditional it.each into two plain tests (nit).
• Accepted: when the label isn't truncated, refusing the controlled open still sends Radix's tooltip-open event to the provider. The only effect is a 100ms skip-delay window, so I didn't add pointer and focus handlers to avoid it.
• Accepted: after a mouse user picks an option, focus returns to the trigger, so a truncated label's tooltip opens. That matches the keyboard behavior.

Doc check. No docs describe filter label truncation, so no docs changes are needed.