Preserve browser fixture failures

Report network isolation violations without masking the original Playwright test or fixture error.

Author: Bill Leoutsakos

apps/sim/e2e/fixtures/browser-test.ts

@@ -9,10 +9,20 @@ export const test = base.extend<BrowserFixtures>({
   browserNetworkGuard: [
     async ({ context }, use) => {
       const guard = await installBrowserNetworkGuard(context)
+      const failures: unknown[] = []
       try {
         await use(undefined)
-      } finally {
+      } catch (error) {
+        failures.push(error)
+      }
+      try {
         guard.assertNoUnexpectedRequests()
+      } catch (error) {
+        failures.push(error)
+      }
+      if (failures.length === 1) throw failures[0]
+      if (failures.length > 1) {
+        throw new AggregateError(failures, 'Browser test and network isolation both failed')
       }
     },
     { auto: true },