Add airplane image to empty state, remove Google button beta label

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: jdamcd

e2e/app.spec.ts-snapshots/empty-map-chromium-darwin.png

@@ -341,7 +341,6 @@ export function CalendarInput({ onImport }: CalendarInputProps) {
                 />
               </svg>
               Connect Google Calendar
-              <span className="px-1.5 py-0.5 text-xs font-medium rounded-full bg-purple-100 text-purple-700 dark:bg-purple-800/50 dark:text-purple-300">Beta</span>
             </button>
           )}
 

public/empty.png

@@ -101,6 +101,7 @@ export function VisitList({
         {sortedVisits.length === 0 ? (
           <div className="flex items-center justify-center h-full p-6 text-center text-gray-500 dark:text-gray-400 text-sm leading-relaxed">
             <div>
+              <img src="/empty.png" srcSet="/empty.png 1x, /empty@2x.png 2x" alt="" className="w-32 mx-auto mb-4" />
               <p className="font-medium text-gray-700 dark:text-gray-300 mb-2">Import a calendar to visualise travel history</p>
               <p>Trips are automatically detected from events like flights and hotel bookings</p>
             </div>