Implement client-side error timing

src/components/admin/ErrorDetailsModal.tsx

@@ -57,8 +57,7 @@ Timestamp: ${format(new Date(error.created_at), 'PPpp')}
 Type: ${error.error_type}
 Endpoint: ${error.endpoint}
 Method: ${error.method}
-Status: ${error.status_code}
-Duration: ${error.duration_ms}ms
+Status: ${error.status_code}${error.duration_ms != null ? `\nDuration: ${error.duration_ms}ms` : ''}
 
 Error Message:
 ${error.error_message}
@@ -117,10 +116,12 @@ ${error.error_stack ? `Stack Trace:\n${error.error_stack}` : ''}
                 <label className="text-sm font-medium">Status Code</label>
                 <p className="text-sm">{error.status_code}</p>
               </div>
+              {error.duration_ms != null && (
                 <div>
                   <label className="text-sm font-medium">Duration</label>
                   <p className="text-sm">{error.duration_ms}ms</p>
                 </div>
+              )}
               {error.user_id && (
                 <div>
                   <label className="text-sm font-medium">User ID</label>

src/lib/errorHandler.ts

@@ -8,6 +8,7 @@ export type ErrorContext = {
   action: string;
   userId?: string;
   metadata?: Record<string, unknown>;
+  duration?: number; // Optional: milliseconds the operation took
 };
 
 export class AppError extends Error {
@@ -78,6 +79,7 @@ export const handleError = (
       p_breadcrumbs: JSON.stringify(breadcrumbs),
       p_timezone: envContext.timezone,
       p_referrer: document.referrer || undefined,
+      p_duration_ms: context.duration,
     }).then(({ error: dbError }) => {
       if (dbError) {
         logger.error('Failed to log error to database', { dbError });
@@ -161,6 +163,7 @@ export const handleNonCriticalError = (
       p_breadcrumbs: JSON.stringify(breadcrumbs),
       p_timezone: envContext.timezone,
       p_referrer: document.referrer || undefined,
+      p_duration_ms: context.duration,
     }).then(({ error: dbError }) => {
       if (dbError) {
         logger.error('Failed to log non-critical error to database', { dbError });
@@ -202,3 +205,21 @@ export function hasErrorCode(error: unknown): error is { code: string } {
     typeof (error as { code: unknown }).code === 'string'
   );
 }
+
+/**
+ * Helper to wrap async operations with automatic duration tracking
+ * Use this for operations where you want to track how long they took before failing
+ */
+export async function withErrorTiming<T>(
+  fn: () => Promise<T>,
+  errorContext: Omit<ErrorContext, 'duration'>
+): Promise<T> {
+  const start = performance.now();
+  try {
+    return await fn();
+  } catch (error) {
+    const duration = Math.round(performance.now() - start);
+    handleError(error, { ...errorContext, duration });
+    throw error;
+  }
+}

src/pages/admin/ErrorMonitoring.tsx

@@ -165,7 +165,7 @@ export default function ErrorMonitoring() {
                         <div className="flex items-center gap-4 text-xs text-muted-foreground">
                           <span>ID: {error.request_id.slice(0, 8)}</span>
                           <span>{format(new Date(error.created_at), 'PPp')}</span>
-                          <span>{error.duration_ms}ms</span>
+                          {error.duration_ms != null && <span>{error.duration_ms}ms</span>}
                         </div>
                       </div>
                     </div>