fix: calendar date parsing, login credentials hint, flag z-index overlap

src/components/CalendarStrip.tsx

@@ -27,7 +27,8 @@ const typeEmoji: Record<CalendarEvent['type'], string> = {
 };
 
 function formatMonthDay(dateStr: string) {
-  const d = new Date(dateStr + 'T00:00:00');
+  // Handle both ISO timestamp and date-only formats
+  const d = dateStr.includes('T') ? new Date(dateStr) : new Date(dateStr + 'T00:00:00');
   return { month: d.toLocaleString('en-US', { month: 'short' }), day: d.getDate() };
 }
 

src/components/LanguageSwitcher.tsx

@@ -37,7 +37,7 @@ export default function LanguageSwitcher() {
       onClick={toggleLanguage}
       style={{
         position: 'fixed',
-        top: '1rem',
+        top: '3.5rem',
         right: '1rem',
         zIndex: 1000,
         background: 'rgba(255, 255, 255, 0.9)',