Viewport size keeps reverting to 1280 × 720 in agent browser dashboard

On the Viewport tab in the Agent Browser dashboard, new sessions use a fixed viewport rather than fitting the available dashboard space. I have to manually select Fit for each new session.

Any of these options would improve this:

• Remember my selected viewport size or Fit preference across sessions.
• Support a CLI option such as agent-browser dashboard start --viewport fit.
• Add an Auto-fit toggle that applies Fit when connecting or switching sessions.
• Make Fit the default.