feat: overhaul admin user management and desktop UX

src/app/api/admin/users/route.ts

@@ -101,6 +101,21 @@ export async function POST(request: Request) {
     },
   })
 
+  await prisma.user.upsert({
+    where: { email: user.email },
+    update: {
+      name: user.name ?? user.email,
+      role: role.toUpperCase(),
+      tenantId,
+    },
+    create: {
+      email: user.email,
+      name: user.name ?? user.email,
+      role: role.toUpperCase(),
+      tenantId,
+    },
+  })
+
   const convexUrl = process.env.NEXT_PUBLIC_CONVEX_URL
   if (convexUrl) {
     try {