feat(a2ui): enhance A2UI notification handling and multi-select support

ccw/frontend/src/components/a2ui/A2UIPopupCard.tsx

@@ -0,0 +1,133 @@
+// ========================================
+// A2UIPopupCard Component
+// ========================================
+// Centered popup dialog for A2UI surfaces with minimalist design
+// Used for displayMode: 'popup' surfaces (e.g., ask_question)
+
+import { useCallback, useEffect } from 'react';
+import { useIntl } from 'react-intl';
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+  DialogDescription,
+} from '@/components/ui/Dialog';
+import { A2UIRenderer } from '@/packages/a2ui-runtime/renderer';
+import { useNotificationStore } from '@/stores';
+import type { SurfaceUpdate } from '@/packages/a2ui-runtime/core/A2UITypes';
+import { cn } from '@/lib/utils';
+
+// ========== Types ==========
+
+interface A2UIPopupCardProps {
+  /** A2UI Surface to render */
+  surface: SurfaceUpdate;
+  /** Callback when dialog is closed */
+  onClose: () => void;
+}
+
+// ========== Component ==========
+
+export function A2UIPopupCard({ surface, onClose }: A2UIPopupCardProps) {
+  const { formatMessage } = useIntl();
+  const sendA2UIAction = useNotificationStore((state) => state.sendA2UIAction);
+
+  // Extract title and description from surface components if available
+  const titleComponent = surface.components.find(
+    (c) => c.id === 'title' && 'Text' in c.component
+  );
+  const descriptionComponent = surface.components.find(
+    (c) => c.id === 'description' && 'Text' in c.component
+  );
+  const messageComponent = surface.components.find(
+    (c) => c.id === 'message' && 'Text' in c.component
+  );
+
+  // Get text content from component
+  const getTextContent = (component: any): string => {
+    if (!component?.component?.Text?.text) return '';
+    const text = component.component.Text.text;
+    if ('literalString' in text) return text.literalString;
+    return '';
+  };
+
+  const title = getTextContent(titleComponent) ||
+    formatMessage({ id: 'askQuestion.defaultTitle' }) ||
+    'Question';
+  const description = getTextContent(descriptionComponent) || getTextContent(messageComponent);
+
+  // Filter out title/description components for body rendering
+  const bodyComponents = surface.components.filter(
+    (c) => c.id !== 'title' && c.id !== 'description' && c.id !== 'message'
+  );
+
+  // Create a surface subset for body rendering
+  const bodySurface: SurfaceUpdate = {
+    ...surface,
+    components: bodyComponents,
+  };
+
+  // Handle A2UI actions
+  const handleAction = useCallback(
+    (actionId: string, params?: Record<string, unknown>) => {
+      // Send action to backend via WebSocket
+      sendA2UIAction(actionId, surface.surfaceId, params);
+
+      // Check if this action should close the dialog
+      // (confirm, cancel, submit, answer actions typically resolve the question)
+      const resolvingActions = ['confirm', 'cancel', 'submit', 'answer'];
+      if (resolvingActions.includes(actionId)) {
+        onClose();
+      }
+    },
+    [sendA2UIAction, surface.surfaceId, onClose]
+  );
+
+  // Handle dialog close (ESC key or overlay click)
+  const handleOpenChange = useCallback(
+    (open: boolean) => {
+      if (!open) {
+        // Send cancel action when closing via ESC or overlay
+        sendA2UIAction('cancel', surface.surfaceId, {
+          questionId: (surface.initialState as any)?.questionId,
+        });
+        onClose();
+      }
+    },
+    [sendA2UIAction, surface.surfaceId, onClose]
+  );
+
+  return (
+    <Dialog open onOpenChange={handleOpenChange}>
+      <DialogContent
+        className={cn(
+          // Minimalist style: no heavy borders, light shadow, rounded corners
+          'sm:max-w-[420px] max-h-[80vh] overflow-y-auto',
+          'bg-card p-6 rounded-xl shadow-md border-0',
+          // Animation classes
+          'data-[state=open]:animate-in data-[state=closed]:animate-out',
+          'data-[state=open]:fade-in-0 data-[state=closed]:fade-out-0',
+          'data-[state=open]:zoom-in-95 data-[state=closed]:zoom-out-95',
+          'data-[state=open]:duration-300 data-[state=closed]:duration-200'
+        )}
+      >
+        <DialogHeader className="space-y-1.5 pb-4">
+          <DialogTitle className="text-lg font-semibold">{title}</DialogTitle>
+          {description && (
+            <DialogDescription className="text-sm text-muted-foreground">
+              {description}
+            </DialogDescription>
+          )}
+        </DialogHeader>
+
+        {/* A2UI Surface Body */}
+        <div className="space-y-4 py-2">
+          <A2UIRenderer surface={bodySurface} onAction={handleAction} />
+        </div>
+      </DialogContent>
+    </Dialog>
+  );
+}
+
+export default A2UIPopupCard;

ccw/frontend/src/components/a2ui/index.ts

@@ -4,3 +4,4 @@
 // Export all A2UI-related components
 
 export { AskQuestionDialog } from './AskQuestionDialog';
+export { A2UIPopupCard } from './A2UIPopupCard';