light and dark mode fixed and default mode is the default unless you pick Spidey mode

src/app/api/auth/login/route.ts

@@ -12,6 +12,7 @@ import {
   setSessionContext,
   SESSION_COOKIE,
 } from "@/lib/auth"
+import { query } from "@/lib/db"
 
 function jsonResponse(data: unknown, status: number) {
   return new Response(JSON.stringify(data), {
@@ -114,6 +115,11 @@ export async function POST(request: NextRequest) {
       true
     )
 
+    await query(
+      `UPDATE users SET preferences = preferences || $2::jsonb WHERE id = $1`,
+      [dbUser.id, JSON.stringify({ website_theme: "default" })],
+    )
+
     const token = await createSession(dbUser.id, dbUser.role_name)
     await setSessionContext(dbUser.id, ipAddress)