refactor: enforce frontend view model boundaries

src/test/handlers.ts

@@ -19,9 +19,11 @@ const handlers = [
 	),
 	http.get("*/api/v1/auth/me", () => HttpResponse.json(authentication.user)),
 	http.get("*/api/v1/tbank-connection", () =>
-		HttpResponse.json((/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
-			{ connected: false, connectedAt: null }
-			/* eslint-enable unicorn/no-null */)),
+		/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+		HttpResponse.json(
+			{ connected: false, connectedAt: null },
+			/* eslint-enable unicorn/no-null */
+		),
 	),
 	http.put("*/api/v1/tbank-connection", () =>
 		HttpResponse.json({ connected: true, connectedAt: "2026-08-14T00:00:00Z" }),
@@ -47,15 +49,17 @@ const handlers = [
 	),
 	http.get("*/api/v1/brokerage-accounts/:accountId/operations", () =>
 		HttpResponse.json(
-			resource((/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+			/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+			resource(
 				{
 					accountId: "account-1",
 					hasNext: false,
 					items: [],
 					nextCursor: null,
 					observedAt: "2026-08-14T00:00:00Z",
-				}
-				/* eslint-enable unicorn/no-null */)),
+				},
+				/* eslint-enable unicorn/no-null */
+			),
 		),
 	),
 	http.get("*/api/v1/brokerage-accounts/:accountId/events", () =>

src/test/resource.ts

@@ -2,8 +2,10 @@ import type { paths } from "@/shared/api";
 
 type Meta
 	= paths["/api/v1/brokerage-accounts"]["get"]["responses"][200]["content"]["application/json"]["meta"];
+
 function resource<T>(data: T, meta: Partial<Meta> = {}) {
-	return (/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+	/* eslint-disable unicorn/no-null -- Fixture preserves the production contract’s explicit null values. */
+	return (
 		{
 			data,
 			meta: {
@@ -17,7 +19,8 @@ function resource<T>(data: T, meta: Partial<Meta> = {}) {
 				...meta,
 			} satisfies Meta,
 		}
-	/* eslint-enable unicorn/no-null */);
+		/* eslint-enable unicorn/no-null */
+	);
 }
 
 export { resource };

src/test/setup.ts

@@ -39,7 +39,9 @@ Object.defineProperty(globalThis, "matchMedia", {
 		dispatchEvent: () => false,
 		matches: false,
 		media: query,
-		onchange: /* eslint-disable-line unicorn/no-null -- Exercise the explicit null returned by the production API/DOM contract. */ null,
+		onchange:
+			// eslint-disable-next-line unicorn/no-null -- Exercise the explicit null returned by the production API/DOM contract.
+			null,
 		removeEventListener: () => {},
 		removeListener: () => {},
 	}),

src/test/storybook.test.tsx

@@ -28,6 +28,7 @@ describe("Storybook isolated product examples", () => {
 			vi.spyOn(Document.prototype, "cookie", "get"),
 			vi.spyOn(Document.prototype, "cookie", "set"),
 		];
+
 		const stories = [
 			...Object.values(composeStories(AccountStories, preview)),
 			...Object.values(composeStories(LoadingStories, preview)),
@@ -39,16 +40,20 @@ describe("Storybook isolated product examples", () => {
 			...Object.values(composeStories(IncomePeriodStories, preview)),
 			...Object.values(composeStories(OperationStories, preview)),
 		];
+
 		for (const Story of stories) {
 			render(<Story />);
 			for (const button of screen.queryAllByRole("button"))
 				fireEvent.click(button);
 			for (const link of screen.queryAllByRole("link")) fireEvent.click(link);
+
 			for (const image of screen.queryAllByRole("img")) {
 				expect(image).not.toHaveAttribute("src");
 			}
+
 			cleanup();
 		}
+
 		for (const spy of spies) expect(spy).not.toHaveBeenCalled();
 	});