FA-36732 / Tab interfaces / Member archive

Per tab location history: history cap oldest eviction · case 02

The tab workspace reports an incorrect history cap oldest eviction.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

A document tab maintains location history independent of sibling views. Navigating after Back truncates its forward branch, caps history and restores exact cursor offsets.

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 1	`[[10, 20, 30, 40], [10, 20, 30, 40, 100], [10, 20, 30, 40], 2, 30, [3, 6]]`	`[[10, 20, 30, 40], [10, 20, 30, 40, 100], [20, 30, 40, 100], 2, 30, [3, 6]]`	Failed

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

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