FA-36413 / Tab interfaces / Member archive

Dock target regions: center self drop noop · case 03

The tab workspace reports an incorrect center self drop noop.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

A dropped tab creates a new ungrouped pane only in an edge docking zone; center targets join the destination group. Center drops into the source pane are no-ops. Corners resolve to the nearest normalized edge.

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 7	`[false, "left", "bottom", "horizontal", true, null]`	`[false, "left", "bottom", "horizontal", false, null]`	Failed

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