fix: add defensive fallbacks for missing database relationships

src/components/SessionList.tsx

@@ -40,6 +40,24 @@ export default function SessionList() {
 
         if (error) {
             console.error('Error fetching sessions:', error);
+            // Fallback: try without tastings join if relationship is missing
+            const { data: fallbackData, error: fallbackError } = await supabase
+                .from('tasting_sessions')
+                .select(`
+                    *,
+                    session_participants (count)
+                `)
+                .order('scheduled_at', { ascending: false });
+
+            if (fallbackError) {
+                console.error('Error fetching sessions fallback:', fallbackError);
+            } else {
+                setSessions(fallbackData.map(s => ({
+                    ...s,
+                    participant_count: s.session_participants[0]?.count || 0,
+                    whisky_count: 0
+                })) || []);
+            }
         } else {
             setSessions(data.map(s => ({
                 ...s,