test(web): add chat-stream helper, thread fixture, and smoke spec

surfsense_web/tests/fixtures/chat-thread.fixture.ts

@@ -0,0 +1,42 @@
+import type { APIRequestContext } from "@playwright/test";
+import { authHeaders, BACKEND_URL } from "../helpers/api/auth";
+import type { SearchSpaceFixtures } from "./search-space.fixture";
+
+export type ChatThreadRow = {
+	id: number;
+	title: string;
+	search_space_id: number;
+	visibility: string;
+	created_by_id: string | null;
+	created_at: string;
+	updated_at: string;
+};
+
+export type ChatThreadFixtures = {
+	chatThread: ChatThreadRow;
+};
+
+type ChatThreadFixtureArgs = SearchSpaceFixtures & {
+	request: APIRequestContext;
+};
+
+export const chatThreadFixtures = {
+	chatThread: async (
+		{ request, apiToken, searchSpace }: ChatThreadFixtureArgs,
+		use: (thread: ChatThreadRow) => Promise<void>
+	) => {
+		const response = await request.post(`${BACKEND_URL}/api/v1/threads`, {
+			headers: authHeaders(apiToken),
+			data: {
+				title: "e2e-drive-journey",
+				search_space_id: searchSpace.id,
+				visibility: "PRIVATE",
+			},
+		});
+		if (!response.ok()) {
+			throw new Error(`create chat thread failed (${response.status()}): ${await response.text()}`);
+		}
+
+		await use((await response.json()) as ChatThreadRow);
+	},
+};