FA-35570 / Tab interfaces / Member archive

Reorder drop: same gap noop · case 05

The tab workspace reports an incorrect same gap noop.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

A strip drag uses pre-removal boundary indices: remove the dragged view, decrement later boundaries, clamp and insert while retaining active identity.

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	`["b", ["a", "c", "d", "background0", "background1", "background2", "background3"], 1, false, 0, "c"]`	`["b", ["a", "c", "d", "background0", "background1", "background2", "background3"], 1, true, 0, "c"]`	Failed

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