* perf(terminal): smooth layout drags and faster tab switching
Defer xterm refit during split, sidebar, and host-tree drags while keeping pane containers in sync with live layout measurements. Refactor TerminalLayer into focused sections with TabBridge/memo optimizations and add the terminal host tree sidebar.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(terminal): keep side panels alive and guard session attach races
Prevent terminal boot unmount from leaking backend sessions, keep SFTP/scripts/theme/AI state when switching side tabs, and defer heavy SFTP UI mount so first entry stays responsive.
Co-authored-by: Cursor <cursoragent@cursor.com>
* perf(terminal): reduce tab switch jank
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Co-authored-by: Cursor <cursoragent@cursor.com>
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