Replace single-column card layout with two-pane shell (sidebar + main) for
better visual separation between provider sections. Introduce tabbed navigation
between CivitAI and HuggingFace settings.
Replace checkbox rows with modern toggle switches for all boolean search-method
options. Each toggle includes an inline tooltip for immediate context.
Add unsaved-changes status indicator (dirty/saved states) to improve UX.
Remove the separate 'How to get CivitAI session token' expandable help panel;
tooltip now contains concise instructions inline.
Update form layout to use grid-based input rows with consistent spacing and
improved mobile responsiveness via media queries. Adjust colors, borders,
and spacing throughout for a cleaner, more compact appearance.