Reduce false positives in travel event detection

- Remove "tour" from travel keywords (concert tours are not travel)
- Only detect flight numbers in event summary, not description/location
  (fixes false positives from UK postcodes and confirmation codes)
- Update empty state text and centre it

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

Author: jdamcd

src/components/VisitList.tsx

@@ -113,8 +113,8 @@ export function VisitList({
 
       <div className="flex-1 overflow-y-auto">
         {sortedVisits.length === 0 ? (
-          <div className="p-4 text-center text-gray-500 dark:text-gray-400">
-            No countries visited yet
+          <div className="flex items-center justify-center h-full p-4 text-gray-500 dark:text-gray-400">
+            Import a calendar to get started
           </div>
         ) : (
           <ul className="divide-y divide-gray-100 dark:divide-gray-700">

src/lib/country-extractor.test.ts

@@ -201,6 +201,20 @@ describe('extractCountryVisits', () => {
     expect(visits[0].countryCode).toBe('US');
   });
 
+  it('only detects flight numbers in summary, not description or location', () => {
+    const events: CalendarEvent[] = [
+      createEvent({
+        summary: 'Local event',
+        description: 'Reference: AB123',
+        location: '123 Main St, London SW1A 1AA',
+        startDate: new Date('2024-01-15'),
+        endDate: new Date('2024-01-15'),
+      }),
+    ];
+    const visits = extractCountryVisits(events);
+    expect(visits).toHaveLength(0);
+  });
+
   it('detects train stations as travel indicator', () => {
     const events: CalendarEvent[] = [
       createEvent({

src/lib/country-extractor.ts

@@ -26,7 +26,7 @@ const HOTEL_KEYWORDS = [
 ];
 
 const TRAVEL_KEYWORDS = [
-  'trip', 'travel', 'vacation', 'holiday', 'visit', 'tour',
+  'trip', 'travel', 'vacation', 'holiday', 'visit',
   'excursion', 'journey', 'abroad'
 ];
 
@@ -173,7 +173,7 @@ function isTravelEvent(event: CalendarEvent): boolean {
   const hasHotelKeyword = HOTEL_KEYWORDS.some((kw) => matchesWholeWord(searchText, kw));
   const hasTravelKeyword = TRAVEL_KEYWORDS.some((kw) => matchesWholeWord(searchText, kw));
   const hasAirportCode = extractAirportCodes(fullText).length > 0;
-  const hasFlightNum = hasFlightNumber(fullText);
+  const hasFlightNum = hasFlightNumber(event.summary);
 
   if (hasFlightKeyword || hasHotelKeyword || hasTravelKeyword || hasAirportCode || hasFlightNum) {
     return true;