[FEATURE] Change "Save Changes" to "Save & Connect"

# Feature

The current "Save Changes" button on the server connection modal (Connect tab) already saves the configuration *and* connects to the server, but the button label doesn't make this clear.

# Solution

Rename it to "Save & Connect" so users understand what will happen when they click it.

# Alternatives

None — this is a small, unambiguous label fix.

# Additional Context

Screenshot showing the server connection modal with the current "Save Changes" button, which both saves the config and connects.

Search the frontend for the "Save Changes" label and identify the server connection modal's Connect tab. Update the button text to "Save & Connect", then run the relevant frontend checks and confirm the modal displays the new label while retaining its save-and-connect behavior.

Written by the indexing model from the issue text.