Add Vercel AI Gateway provider support (#1183)

src/app/api/providers/[id]/test/testUtils.js

@@ -399,6 +399,10 @@ async function testApiKeyConnection(connection, effectiveProxy = null) {
         const res = await fetchWithConnectionProxy("https://api.openai.com/v1/models", { headers: { Authorization: `Bearer ${connection.apiKey}` } }, effectiveProxy);
         return { valid: res.ok, error: res.ok ? null : "Invalid API key" };
       }
+      case "vercel-ai-gateway": {
+        const res = await fetchWithConnectionProxy("https://ai-gateway.vercel.sh/v1/models", { headers: { Authorization: `Bearer ${connection.apiKey}` } }, effectiveProxy);
+        return { valid: res.ok, error: res.ok ? null : "Invalid API key" };
+      }
       case "anthropic": {
         const res = await fetchWithConnectionProxy("https://api.anthropic.com/v1/messages", {
           method: "POST",