Organize composer into its own module

packages/app/src/composer/agent-controls/model-loading.test.ts

@@ -0,0 +1,31 @@
+import { QueryClient, QueryObserver } from "@tanstack/react-query";
+import { describe, expect, it } from "vitest";
+
+import { isProviderModelsQueryLoading } from "./model-loading";
+
+describe("isProviderModelsQueryLoading", () => {
+  it("does not treat a disabled pending query as loading", () => {
+    const queryClient = new QueryClient();
+    const observer = new QueryObserver(queryClient, {
+      queryKey: ["providerModels", "server-1", "__missing_provider__"],
+      enabled: false,
+      queryFn: async () => [],
+    });
+
+    const result = observer.getCurrentResult();
+
+    expect(result.isPending).toBe(true);
+    expect(result.isLoading).toBe(false);
+    expect(result.isFetching).toBe(false);
+    expect(isProviderModelsQueryLoading(result)).toBe(false);
+  });
+
+  it("treats an active fetch as loading", () => {
+    expect(
+      isProviderModelsQueryLoading({
+        isLoading: false,
+        isFetching: true,
+      }),
+    ).toBe(true);
+  });
+});