refactor(workspace): enforce layered crate boundaries

frontend/src/router/routes/__tests__/helpers.spec.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it, vi } from 'vitest'
+
+const { importWithRetryMock } = vi.hoisted(() => ({
+  importWithRetryMock: vi.fn(async (loader: () => Promise<unknown>) => loader()),
+}))
+
+vi.mock('@/utils/importRetry', () => ({
+  importWithRetry: importWithRetryMock,
+}))
+
+import { view } from '../helpers'
+
+describe('route view loader', () => {
+  it('exposes a side-effect-free raw loader for navigation prefetch', async () => {
+    const component = { name: 'LazyPage' }
+    const rawLoader = vi.fn(async () => component)
+    const routeLoader = view(rawLoader)
+
+    await expect(routeLoader.prefetch()).resolves.toBe(component)
+    expect(rawLoader).toHaveBeenCalledTimes(1)
+    expect(importWithRetryMock).not.toHaveBeenCalled()
+
+    await expect(routeLoader()).resolves.toBe(component)
+    expect(importWithRetryMock).toHaveBeenCalledTimes(1)
+  })
+})