Two bugs from the visual gate, same dump-confirmed cause: row 2 is an 11-element
band (left edge-piece 0x100006B6 + 9 slots 0x100006B7..BF + right edge-piece
0x100006C0, all at content-y 90), but SecondRow hid only the 9 slots — so the two
edge-pieces kept drawing as black pillars below the collapsed bar. And toolbarRoot
(ClickThrough=false, full height) still caught clicks below the collapsed frame →
walked up to the Draggable frame → phantom window-move.
Fix: SecondRow now hides the full band (B6..C0); toolbarRoot.ClickThrough=true so
its children (slots/indicators) still get hits children-first but its empty/below
regions fall through (no phantom drag) — same pattern as the chat content panel.
The slots are edge-flag 0 = Left|Top fixed, so nothing reflows. Build green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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