FA-35987 / Tab interfaces / Member archive

Group block move: self drop detection · case 02

The tab workspace reports an incorrect self drop detection.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

Move a contiguous tab group as one block: retain member order, remove all originals, rebase target boundary by members preceding it and preserve selected 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", "c"], ["a", "d", "e", "background0"], 1, false, "c", 2]`	`[["b", "c"], ["a", "d", "e", "background0"], 1, true, "c", 2]`	Failed

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

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