When switching from SSH back to RDP, the canvas retained the resolution
from when the copilot panel was open — even after closing the panel.
The ResizeObserver doesn't fire while the tab is hidden (v-show/display),
so the container size change goes unnoticed.
Fix: On tab activation, double-rAF waits for layout, measures the
container via getBoundingClientRect, compares with canvas.width/height,
and sends rdp_resize if they differ. This ensures the RDP session
always matches the current available space.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
04c140f608