POR-22460: Filter cross-origin history SecurityError noise from Sentry

Add shared browser Sentry ignore patterns for history API instrumentation
noise, including NS Pushstate prevention and cross-origin replaceState
SecurityErrors seen during portal OAuth/login redirects.

Co-authored-by: Neil Raina <makeitraina@users.noreply.github.com>

Author: cursoragent

src/instrumentation-client.ts

@@ -4,6 +4,8 @@
 
 import * as Sentry from '@sentry/nextjs'
 
+import { browserSentryIgnoredErrors } from '@/utils/sentryIgnoredErrors'
+
 const dsn = process.env.NEXT_PUBLIC_SENTRY_DSN || process.env.SENTRY_DSN
 const vercelEnv = process.env.NEXT_PUBLIC_VERCEL_ENV
 const isProd = process.env.NEXT_PUBLIC_VERCEL_ENV === 'production'
@@ -33,7 +35,7 @@ if (dsn) {
       //   }),
     ],
 
-    ignoreErrors: [/fetch failed/i, /failed to fetch/i],
+    ignoreErrors: browserSentryIgnoredErrors,
 
     beforeSend(event) {
       if (!isProd && event.type === undefined) {

src/utils/sentryIgnoredErrors.test.ts

@@ -0,0 +1,30 @@
+import { isIgnoredBrowserSentryError } from './sentryIgnoredErrors'
+
+describe('isIgnoredBrowserSentryError', () => {
+  it('ignores browser history pushState instrumentation noise', () => {
+    expect(isIgnoredBrowserSentryError('Error: NS Pushstate prevention')).toBe(true)
+    expect(isIgnoredBrowserSentryError('ns pushstate prevention')).toBe(true)
+  })
+
+  it('ignores cross-origin history replaceState security errors', () => {
+    expect(
+      isIgnoredBrowserSentryError(
+        'SecurityError: Blocked attempt to use history.replaceState() to change session history URL from https://help.kudzu.digital/login?step=signIn to https://auth.copilot.app/auth/google/callback.',
+      ),
+    ).toBe(true)
+    expect(
+      isIgnoredBrowserSentryError(
+        'SecurityError: Blocked attempt to use history.pushState() to change session history URL from https://portal.example.com/login to https://auth.copilot.app/auth/google/callback.',
+      ),
+    ).toBe(true)
+  })
+
+  it('keeps ignoring generic browser fetch failures', () => {
+    expect(isIgnoredBrowserSentryError('TypeError: Failed to fetch')).toBe(true)
+    expect(isIgnoredBrowserSentryError('Error: fetch failed')).toBe(true)
+  })
+
+  it('does not ignore unrelated application errors', () => {
+    expect(isIgnoredBrowserSentryError('Error: Unable to create task')).toBe(false)
+  })
+})

src/utils/sentryIgnoredErrors.ts

@@ -0,0 +1,10 @@
+export const browserSentryIgnoredErrors = [
+  /fetch failed/i,
+  /failed to fetch/i,
+  /NS Pushstate prevention/i,
+  /Blocked attempt to use history\.(replace|push)State\(\)/i,
+]
+
+export function isIgnoredBrowserSentryError(errorMessage: string) {
+  return browserSentryIgnoredErrors.some((ignoredError) => ignoredError.test(errorMessage))
+}