📚 feat: Add Source Citations for File Search in Agents (#8652)

* feat: Source Citations for file_search in Agents

* Fix: Added citation limits and relevance score to app service. Removed duplicate tests

* ✨ feat: implement Role-level toggle to optionally disable file Source Citation in Agents

* 🐛 fix: update mock for librechat-data-provider to include PermissionTypes and SystemRoles

---------

Co-authored-by: “Praneeth <praneeth.goparaju@slalom.com>

client/src/components/Web/SourcesErrorBoundary.tsx

@@ -0,0 +1,58 @@
+import React, { Component, ReactNode } from 'react';
+
+interface Props {
+  children: ReactNode;
+  fallback?: ReactNode;
+  onError?: (error: Error, errorInfo: React.ErrorInfo) => void;
+  showDetails?: boolean;
+}
+
+interface State {
+  hasError: boolean;
+}
+
+class SourcesErrorBoundary extends Component<Props, State> {
+  state = { hasError: false };
+
+  static getDerivedStateFromError() {
+    return { hasError: true };
+  }
+
+  componentDidCatch(error: Error, errorInfo: React.ErrorInfo) {
+    console.error('Sources error:', error);
+    this.props.onError?.(error, errorInfo);
+  }
+
+  render() {
+    if (this.state.hasError) {
+      // Use custom fallback if provided
+      if (this.props.fallback) {
+        return this.props.fallback;
+      }
+
+      // Default simple error UI (using localized strings from Sources.tsx fallback)
+      /* eslint-disable i18next/no-literal-string */
+      return (
+        <div
+          className="flex flex-col items-center justify-center rounded-lg border border-border-medium bg-surface-secondary p-4 text-center"
+          role="alert"
+          aria-live="polite"
+        >
+          <div className="mb-2 text-sm text-text-secondary">Sources temporarily unavailable</div>
+          <button
+            onClick={() => window.location.reload()}
+            className="hover:bg-surface-primary-hover rounded-md bg-surface-primary px-3 py-1 text-sm text-text-primary focus:outline-none focus:ring-2 focus:ring-ring"
+            aria-label="Reload the page"
+          >
+            Refresh
+          </button>
+        </div>
+      );
+      /* eslint-enable i18next/no-literal-string */
+    }
+
+    return this.props.children;
+  }
+}
+
+export default SourcesErrorBoundary;