[appergb]

Overview period and metric selectors inherited the 16px surface radius, making the small controls look like flattened capsules. Their options now use an 8px corner radius and the enclosing track uses 10px for its 2px inset. The smooth WebKit fallback has the same corner footprint. Labels reserve their bold width so selection does not visibly resize the controls.

The isolated iOS Core patch is refreshed from the existing 121597d fix: the integrated preview retained stale cloud-provider context, causing its iOS preparation check to fail. No native desktop insertion logic changes in this PR.

Validation:

• Production frontend build, macOS arm64 app/DMG build, codesign and disk-image verification passed.
• Five existing WebKit geometry and alignment regression checks passed.
• Visual inspection covered light mode, 100%/110% zoom, both selection groups and the smooth-corner fallback.
• Isolated iOS Core preparation passed locally. macOS CI run 42574283183 and iOS CI run 42574275664 both passed on ca4b8e8, including the iPhone device build.

Stacked on desktop preview PR #1419.

[chatgpt-codex-connector]

Codex Review Summary: ✅ Completed

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-09T06:39:28.205866Z	ca4b8e8	PR opened

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