Fix right-panel gaps and jumps when resizing - #3599
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brsbl merged 24 commits intoSep 13, 2026
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…sjm6wmdy - apps/app/src/components/secondary-panel/ThreadSecondaryPanel.tsx: main's right-panel resize fix (get-bb#3599) removed the hook's external handleSecondaryPanelDragging in favor of an internal handler plus a new required onResizeStart callback, while this branch simplified the same destructure by dropping the old onResizeStart-based expiry wiring (this PR deletes handleSecondaryPanelResizeStart and the display-mode expiry behavior it existed to support). Kept main's resizeHitTargetRef-based resize handling and supplied a no-op onResizeStart, since the only previous caller of that callback (expiry-on-resize) is intentionally removed by this PR and nothing else needs a resize-start signal.
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Human comments
What was wrong
The snap preview changed DOM flex independently of the panel library while both handled pointer input. Repeated drags could desynchronize panel width and open state, causing white strips, release jumps, and duplicate toggles.
What changed
How you verified
Web screenshots use the same stopped thread and two drags to maximum width: 1720 × 1040 CSS pixels, captured at 2×.
cf51227e1d73c0e699BB-Thread-ID: thr_3bp5in88fn