App Mode UI issues: layout reset, history lag and panel position bug

Environment:
- ComfyUI Desktop V2
- Windows

Issues:

1. App Mode layout state is not saved.
After resizing the input area, switching to another workflow and returning resets the size.

2. App Mode parameter layout needs optimization.
Aspect ratio, resolution and model selection take too much vertical space when there are many options.
A compact horizontal layout would improve usability.

3. History panel can affect generation performance.
During text-to-image generation, opening History sometimes causes temporary freezes and increases generation time.

4. Right sidebar position bug.
After switching History panel, the right editing panel can move outside the screen and cannot be restored. Restarting ComfyUI fixes it.

Start by reproducing the four App Mode behaviors on Windows: layout reset after switching workflows, oversized parameter controls, History-induced generation freezes, and the right sidebar moving off-screen. Trace the App Mode layout, History panel, and right-sidebar entry points to identify the affected UI state and performance path. Done means layout state persists, parameters use a compact usable arrangement, History does not disrupt generation, and the sidebar remains recoverable after panel switching.

Written by the indexing model from the issue text.