Erik 24ce8a0b5e docs(D.5.3/B.1): drag-drop spine implementation plan ... Bite-sized TDD plan for Stream B.1, four tasks matching the spec slices: 1. ItemDragPayload + ItemDragSource + IItemListDragHandler + UiItemList handler registration. 2. UiElement GetDragPayload/GetDragGhost virtuals + UiItemSlot drag source + drop target + accept/reject overlay; use moves MouseDown->Click (fixes the existing ToolbarControllerTests.Click test in-task to stay green). 3. UiRoot payload pull + cancel-on-null + cursor ghost (AP-47). 4. ToolbarController stub handler + spine wiring (TS-33) + registration tests. Exact code, commands, and the AP-47/TS-33 register rows inline. Plan + spec preapproved by the user; executing subagent-driven next. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>		2026-06-20 12:31:37 +02:00
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plans	docs(D.5.3/B.1): drag-drop spine implementation plan	2026-06-20 12:31:37 +02:00
specs	docs(D.5.3/B.1): drag-drop spine design spec	2026-06-20 12:23:44 +02:00