[Feature]: Zoom controls for the web preview pane — content is often unreadable in the narrow side panel

[iamtoled]

Before submitting

• I searched existing issues and did not find a duplicate.
• I am describing a concrete problem or use case, not just a vague idea.

Area

apps/desktop

Problem or use case

When a web preview is open in the right sidebar, there is no way to zoom its content. The pane is narrow, so pages built for full-width viewports render small and are frequently unreadable. Cmd +/- either does nothing there or only affects the app UI, not the embedded page.

Proposal

Support zooming the preview webview: Cmd +/-/0 while the preview pane is focused, and/or a small zoom control in the preview toolbar. Persisting the zoom level per preview session would be a bonus.

Related

#3893 asked for wider side panel sizes (closed); #4627 covers UI zoom on the sidebar/main view. This request is specifically about the content of the embedded browser pane.