feat: add tournament creation wizard with participant management and bulk game entry

src/app/api/matches/upload/route.ts

@@ -153,6 +153,23 @@ export async function POST(request: Request) {
         await updatePartnershipStats(players[0].id, players[1].id, team1Won, player1EloChange);
         await updatePartnershipStats(players[2].id, players[3].id, team2Won, player3EloChange);
 
+        // Add players as participants in the tournament (if not already added)
+        for (const player of players) {
+          try {
+            await prisma.eventParticipant.create({
+              data: {
+                eventId: parseInt(eventId),
+                playerId: player.id,
+                status: "participated",
+                registrationDate: new Date(),
+              },
+            });
+          } catch (error) {
+            // Participant already exists, which is fine
+            console.log(`Participant ${player.id} already exists in tournament ${eventId}`);
+          }
+        }
+
         importedCount++;
       } catch (err: any) {
         errors.push(`Row ${index + 2}: ${err.message}`);