Under the hood
The panel area above the chat input now tracks terminal width, not just height, when positioning panes
What
The scrollable area that sits above the chat input (used for things like plugin panels and surveys) now takes the terminal's column count into account, not just its row count, when deciding how to lay itself out. Internally it also switched to a shared "placement" model that tracks a pane's offset, whether it has been placed, and a dedicated view state, replacing older, more ad hoc positioning logic.
Why
This is mostly internal plumbing, but it means panes shown above the prompt should size and position themselves more reliably across different terminal widths.