fix(web): show reasoning settings on hover

[RakshithBhat03]

Hovering the reasoning control gave no explanation of its active settings. This was especially unclear for Codex service tiers because Standard is omitted from the compact label and Fast is represented by a lightning bolt.

The control now shows a tooltip built from the same option descriptors as the dropdown. It reports the selected reasoning level, service tier, context window, agent, and boolean traits when they apply, while leaving the compact button layout unchanged. The same text is used as the control's accessible label.

Tests: 44 focused tests, web typecheck, targeted lint and formatting.

Screenshots

After — hovering the reasoning control shows the full settings tooltip:

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Built by GPT-5.6 Sol in T3 Code through the Codex harness.

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Note

Low Risk
UI-only change to the traits picker trigger (tooltip + aria-label); no API or persistence changes, with behavior covered by updated unit tests.

Overview
The traits/reasoning composer control keeps its compact trigger text (including the fast-mode bolt and Codex tier omissions), but now exposes a full settings summary on hover and for assistive tech.

buildTraitsTriggerDisplay returns a new tooltipLabel built from every provider option descriptor as Label: value segments (reasoning, service tier, context window, fast mode on/off, etc.), joined with ·. The compact label logic is unchanged aside from reusing the same selected-value resolution for booleans.

TraitsPicker wraps the menu trigger in Tooltip, renders TooltipPopup when tooltipLabel is non-empty, and sets aria-label on ComposerControl to that same string. Tests assert expected tooltipLabel values across Codex tiers, fast mode, ultrathink, and empty cases.

^{Reviewed by Cursor Bugbot for commit 63d8423. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Show reasoning settings tooltip on hover in TraitsPicker

• buildTraitsTriggerDisplay now returns a tooltipLabel summarizing each descriptor's selected value (e.g. "Fast Mode: On/Off", "Service Tier: Standard"), while the compact label and fast-mode icon remain unchanged
• The TraitsPicker trigger is wrapped in a tooltip that renders the summary on hover and passes it as the aria-label when nonempty

^{Macroscope summarized 1103e24.}

[macroscopeapp]

Approvability

Verdict: Approved at 63d8423

Macroscope's review found this PR approvable — This is a localized UI fix that adds a tooltip and accessible summary for existing reasoning settings while leaving menu behavior and compact labels unchanged. Focused tests cover the summary-building logic, with no defaults, schemas, infrastructure, or static-analysis configuration affected.

^{You can add or adjust custom eligibility rules. Learn more.}

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[juliusmarminge]

Note

This comment is posted by Julius' dot

Closing for incomplete UI verification. The attached screenshot shows the new settings tooltip, but the required before capture is missing. Please add a matching capture of the same reasoning control before this change, alongside the existing after image, then request reconsideration.