feat(chat): load model options from backend

src/lib/chatModels.ts

@@ -0,0 +1,74 @@
+import { apiFetch } from "@/lib/apiFetch";
+import { config } from "@config/config";
+
+import type { AgentModel } from "./chatStream";
+
+export type AgentModelIcon = "bolt" | "sparkle";
+
+export type AgentModelOption = {
+  id: AgentModel;
+  label: string;
+  description?: string;
+  icon?: AgentModelIcon;
+};
+
+export type AgentModelConfig = {
+  defaultModel?: AgentModel;
+  models: AgentModelOption[];
+};
+
+const isObjectRecord = (value: unknown): value is Record<string, unknown> =>
+  typeof value === "object" && value !== null && !Array.isArray(value);
+
+const normalizeModelOption = (value: unknown): AgentModelOption | null => {
+  if (!isObjectRecord(value) || typeof value.id !== "string") {
+    return null;
+  }
+  const id = value.id.trim();
+  if (!id) {
+    return null;
+  }
+  const label =
+    typeof value.label === "string" && value.label.trim()
+      ? value.label.trim()
+      : id;
+  const description =
+    typeof value.description === "string" && value.description.trim()
+      ? value.description.trim()
+      : undefined;
+  const icon =
+    value.icon === "bolt" || value.icon === "sparkle" ? value.icon : undefined;
+  return {
+    id,
+    label,
+    description,
+    icon,
+  };
+};
+
+export const fetchAgentModels = async (): Promise<AgentModelConfig> => {
+  const response = await apiFetch(`${config.AGENT_URL}/api/v1/agent/chat/models`, {
+    method: "GET",
+    projectHeaderMode: "include",
+    userHeaderMode: "include",
+    skipAuthRedirect: true,
+  });
+  if (!response.ok) {
+    throw new Error(await response.text());
+  }
+  const payload = (await response.json()) as {
+    default_model?: unknown;
+    models?: unknown[];
+  };
+  const models = (payload.models ?? [])
+    .map(normalizeModelOption)
+    .filter((model): model is AgentModelOption => Boolean(model));
+  const defaultModel =
+    typeof payload.default_model === "string" && payload.default_model.trim()
+      ? payload.default_model.trim()
+      : models[0]?.id;
+  return {
+    defaultModel,
+    models,
+  };
+};