get rid of msw, use fetch mock instead

test/fixtures/mock_api.js

@@ -1,19 +0,0 @@
-import { test as testBase } from 'vitest'
-
-import { worker } from './worker.js'
-
-export const test = testBase.extend({
-  worker: [
-    // biome-ignore lint: required by vitest
-    async ({}, use) => {
-      await worker.start()
-
-      await use(worker)
-
-      worker.resetHandlers()
-    },
-    {
-      auto: true,
-    },
-  ],
-})

test/fixtures/worker.js

@@ -1,5 +0,0 @@
-import { setupWorker } from 'msw/browser'
-
-export const worker = setupWorker()
-
-window.__test__ = window.__test__ || 'TEST'