fix: handle empty playerId string in user edit API

src/app/api/admin/users/[id]/route.ts

@@ -32,6 +32,10 @@ export async function PUT(
       );
     }
 
+    // Parse playerId - handle empty string case
+    const parsedPlayerId = playerId ? parseInt(playerId) : undefined;
+    const isValidPlayerId = parsedPlayerId !== undefined && !isNaN(parsedPlayerId);
+
     // Update the user
     const user = await prisma.user.update({
       where: { id },
@@ -39,14 +43,14 @@ export async function PUT(
         email: email || existingUser.email,
         name: name !== undefined ? name : existingUser.name,
         role: role || existingUser.role,
-        playerId: playerId ? parseInt(playerId) : null,
+        playerId: isValidPlayerId ? parsedPlayerId : null,
       },
     });
 
     // Update the player's user relation if needed
     if (playerId !== undefined) {
       // First, remove user from any existing player
-      if (existingUser.playerId && existingUser.playerId !== parseInt(playerId)) {
+      if (existingUser.playerId && existingUser.playerId !== parsedPlayerId) {
         await prisma.player.update({
           where: { id: existingUser.playerId },
           data: { user: { disconnect: true } },
@@ -54,9 +58,9 @@ export async function PUT(
       }
 
       // Then, connect user to the new player
-      if (playerId) {
+      if (isValidPlayerId) {
         await prisma.player.update({
-          where: { id: parseInt(playerId) },
+          where: { id: parsedPlayerId! },
           data: { user: { connect: { id: user.id } } },
         });
       }