test(web): isolate browser preferences and stabilize date input

web/test/medium/app.ts

@@ -161,8 +161,8 @@ const createTimeline = (page: Page, data: MockData) => {
     goToDate: async (asset: AssetResponseDto) => {
       await grid.hover();
       await page.keyboard.press('g');
-      const value = DateTime.fromISO(asset.fileCreatedAt, { zone: 'utc' }).toFormat('MMddyyyy,hh:mm:ss.SSSa');
-      await page.locator('#datetime').pressSequentially(value);
+      const value = DateTime.fromISO(asset.fileCreatedAt, { zone: 'utc' }).toFormat("yyyy-MM-dd'T'HH:mm");
+      await page.locator('#datetime').fill(value);
       await page.getByRole('button', { name: 'confirm', exact: true }).click();
     },
 

web/test/medium/fixtures.ts

@@ -58,6 +58,7 @@ export const test = base.extend<Fixtures, WorkerFixtures>({
       await context.addInitScript(() => {
         if (location.protocol.startsWith('http')) {
           localStorage.setItem('lang', 'dev');
+          localStorage.setItem('locale', 'en-US');
         }
       });
       await use(context);
@@ -80,6 +81,9 @@ export const test = base.extend<Fixtures, WorkerFixtures>({
       const mock = new Mock(context);
       await mock.install(workerPage);
       await use(mock);
+      if (workerPage.url().startsWith(baseURL!)) {
+        await workerPage.evaluate(() => localStorage.clear());
+      }
       await mock.uninstall();
       await context.clearCookies();
       // skipped for failed tests so the report shows the real failure instead of the requests it never reached