refactor(byok): move models suggestions list to server config models-list and fetch dynamically via API

memento-note/app/api/user/api-keys/route.ts

@@ -22,6 +22,8 @@ const createSchema = z.object({
   baseUrl: z.string().url().optional(),
 });
 
+import { PROVIDER_MODEL_SUGGESTIONS } from '@/lib/ai/models-list';
+
 export async function GET() {
   const session = await auth();
   if (!session?.user?.id) {
@@ -36,6 +38,7 @@ export async function GET() {
   return NextResponse.json({
     keys: keys.map(toPublicApiKey),
     allowedProviders: getAllowedByokProviders(await getEffectiveTier(session.user.id)),
+    providerModels: PROVIDER_MODEL_SUGGESTIONS,
   });
 }