FA-35758 / Tab interfaces / Member archive

Tab width budget: unused spacer · case 03

The tab workspace reports an incorrect unused spacer.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

A strip reserves fixed control and pinned widths before distributing remaining width equally among normal tabs, clamped to min/max; report overflow and spacer.

Why this case matters

Offline tab/panel workspace behavior; no browser or desktop framework is emulated.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
workspace regression 2	`[1380, 180, 1200, 480, 0, 0]`	`[1380, 180, 1200, 480, 0, 720]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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