Add API error monitoring tests and error context snapshots for various browsers

- Created error context snapshots for Firefox, WebKit, and Chromium to capture UI state during API error monitoring.
- Implemented e2e tests for API error detection, including console errors, failed API requests, and proxy errors.
- Added functionality to ignore specific API patterns in monitoring assertions.
- Ensured tests validate the monitoring system's ability to detect and report errors effectively.

ccw/frontend/src/pages/ReviewSessionPage.tsx

@@ -209,7 +209,7 @@ export function ReviewSessionPage() {
         <div className="flex items-center gap-4">
           <Button variant="ghost" size="sm" disabled>
             <ArrowLeft className="h-4 w-4 mr-2" />
-            {formatMessage({ id: 'common.back' })}
+            {formatMessage({ id: 'common.actions.back' })}
           </Button>
           <div className="h-8 w-64 rounded bg-muted animate-pulse" />
         </div>
@@ -247,7 +247,7 @@ export function ReviewSessionPage() {
         </p>
         <Button onClick={handleBack}>
           <ArrowLeft className="h-4 w-4 mr-2" />
-          {formatMessage({ id: 'common.back' })}
+          {formatMessage({ id: 'common.actions.back' })}
         </Button>
       </div>
     );
@@ -263,7 +263,7 @@ export function ReviewSessionPage() {
         <div className="flex items-center gap-4">
           <Button variant="ghost" size="sm" onClick={handleBack}>
             <ArrowLeft className="h-4 w-4 mr-2" />
-            {formatMessage({ id: 'common.back' })}
+            {formatMessage({ id: 'common.actions.back' })}
           </Button>
           <div>
             <h1 className="text-2xl font-semibold text-foreground">