Stabilize discovered SSH host row handler

[cursor]

What Changed

• Replaced the inline onConnect closure passed to each memoized DesktopSshHostRow with a stable useCallback handler.
• Keeps suggested SSH host rows eligible to skip re-rendering when unrelated parent state changes, such as typing in the manual SSH host field.

Why

React Doctor flagged ConnectionsSettings.tsx for no-inline-prop-on-memo-component at the discovered SSH host rows. The inline function changed identity on every parent render, defeating memo() for every suggested host row. A stable callback preserves behavior while allowing those rows to avoid unnecessary renders.

UI Changes

Interaction behavior is unchanged. React Scan recordings captured the render behavior:

• Before: /opt/cursor/artifacts/react_scan_before_ssh_host_rows.mp4
• After: /opt/cursor/artifacts/react_scan_after_ssh_host_rows.mp4

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

  

Note

Memoize onConnect handler for discovered SSH host rows in ConnectionsSettings

Replaces the inline arrow function passed as onConnect to DesktopSshHostRow with a useCallback-memoized handler (handleConnectDiscoveredSshHost). This stabilizes the prop reference across renders when handleConnectSshHost is unchanged, avoiding unnecessary re-renders of DesktopSshHostRow.

^{Macroscope summarized 1738ae8.}