feat(agent): expose available assistant models

src/app/api/agent/models/route.ts

@@ -0,0 +1,31 @@
+import { apiError, apiJson } from "@/lib/api-handler";
+import { resolveApiAuth } from "@/lib/api-auth";
+import { getAssistantPreferences } from "@/lib/assistant-preference";
+import { listLlmModels, resolveAssistantModel } from "@/lib/llm/models";
+
+export async function GET(request: Request) {
+  const auth = await resolveApiAuth(request);
+  if (!auth?.userId) {
+    return apiError("Unauthorized", 401);
+  }
+
+  const assistant = await getAssistantPreferences(auth.userId);
+  if (!assistant.enabled) {
+    return apiError("Assistant not enabled", 403);
+  }
+
+  const modelList = await listLlmModels();
+  const resolved = resolveAssistantModel({
+    requestedModel: null,
+    savedModel: assistant.model,
+    fallbackModel: modelList.fallbackModel,
+    models: modelList.models,
+  });
+
+  return apiJson({
+    models: modelList.models,
+    selectedModel: resolved.model,
+    fallbackModel: modelList.fallbackModel,
+    degraded: modelList.degraded,
+  });
+}