feat(ui): implement global ConfirmationModal to replace native window.confirm

src/App.tsx

@@ -2,6 +2,7 @@ import { useCallback, useEffect, useState } from 'react';
 import { HashRouter, Route, Routes } from 'react-router-dom';
 import { LoginPage } from '@/pages/LoginPage';
 import { NotificationContainer } from '@/components/common/NotificationContainer';
+import { ConfirmationModal } from '@/components/common/ConfirmationModal';
 import { SplashScreen } from '@/components/common/SplashScreen';
 import { MainLayout } from '@/components/layout/MainLayout';
 import { ProtectedRoute } from '@/router/ProtectedRoute';
@@ -61,6 +62,7 @@ function App() {
   return (
     <HashRouter>
       <NotificationContainer />
+      <ConfirmationModal />
       <Routes>
         <Route path="/login" element={<LoginPage />} />
         <Route

src/components/common/ConfirmationModal.tsx

@@ -0,0 +1,58 @@
+import { useTranslation } from 'react-i18next';
+import { Modal } from '@/components/ui/Modal';
+import { Button } from '@/components/ui/Button';
+import { useNotificationStore } from '@/stores';
+
+export function ConfirmationModal() {
+  const { t } = useTranslation();
+  const confirmation = useNotificationStore((state) => state.confirmation);
+  const hideConfirmation = useNotificationStore((state) => state.hideConfirmation);
+  const setConfirmationLoading = useNotificationStore((state) => state.setConfirmationLoading);
+
+  const { isOpen, isLoading, options } = confirmation;
+
+  if (!isOpen || !options) {
+    return null;
+  }
+
+  const { title, message, onConfirm, onCancel, confirmText, cancelText, variant = 'primary' } = options;
+
+  const handleConfirm = async () => {
+    try {
+      setConfirmationLoading(true);
+      await onConfirm();
+      hideConfirmation();
+    } catch (error) {
+      console.error('Confirmation action failed:', error);
+      // Optional: show error notification here if needed, 
+      // but usually the calling component handles specific errors.
+    } finally {
+      setConfirmationLoading(false);
+    }
+  };
+
+  const handleCancel = () => {
+    if (onCancel) {
+      onCancel();
+    }
+    hideConfirmation();
+  };
+
+  return (
+    <Modal open={isOpen} onClose={handleCancel} title={title}>
+      <p style={{ margin: '1rem 0' }}>{message}</p>
+      <div style={{ display: 'flex', justifyContent: 'flex-end', gap: '1rem', marginTop: '2rem' }}>
+        <Button variant="ghost" onClick={handleCancel} disabled={isLoading}>
+          {cancelText || t('common.cancel')}
+        </Button>
+        <Button 
+          variant={variant} 
+          onClick={handleConfirm} 
+          loading={isLoading}
+        >
+          {confirmText || t('common.confirm')}
+        </Button>
+      </div>
+    </Modal>
+  );
+}

src/pages/ApiKeysPage.tsx

@@ -14,7 +14,7 @@ import styles from './ApiKeysPage.module.scss';
 
 export function ApiKeysPage() {
   const { t } = useTranslation();
-  const { showNotification } = useNotificationStore();
+  const { showNotification, showConfirmation } = useNotificationStore();
   const connectionStatus = useAuthStore((state) => state.connectionStatus);
 
   const config = useConfigStore((state) => state.config);
@@ -29,7 +29,6 @@ export function ApiKeysPage() {
   const [editingIndex, setEditingIndex] = useState<number | null>(null);
   const [inputValue, setInputValue] = useState('');
   const [saving, setSaving] = useState(false);
-  const [deletingIndex, setDeletingIndex] = useState<number | null>(null);
 
   const disableControls = useMemo(() => connectionStatus !== 'connected', [connectionStatus]);
 
@@ -115,21 +114,24 @@ export function ApiKeysPage() {
     }
   };
 
-  const handleDelete = async (index: number) => {
-    if (!window.confirm(t('api_keys.delete_confirm'))) return;
-    setDeletingIndex(index);
-    try {
-      await apiKeysApi.delete(index);
-      const nextKeys = apiKeys.filter((_, idx) => idx !== index);
-      setApiKeys(nextKeys);
-      updateConfigValue('api-keys', nextKeys);
-      clearCache('api-keys');
-      showNotification(t('notification.api_key_deleted'), 'success');
-    } catch (err: any) {
-      showNotification(`${t('notification.delete_failed')}: ${err?.message || ''}`, 'error');
-    } finally {
-      setDeletingIndex(null);
-    }
+  const handleDelete = (index: number) => {
+    showConfirmation({
+      title: t('common.delete'),
+      message: t('api_keys.delete_confirm'),
+      variant: 'danger',
+      onConfirm: async () => {
+        try {
+          await apiKeysApi.delete(index);
+          const nextKeys = apiKeys.filter((_, idx) => idx !== index);
+          setApiKeys(nextKeys);
+          updateConfigValue('api-keys', nextKeys);
+          clearCache('api-keys');
+          showNotification(t('notification.api_key_deleted'), 'success');
+        } catch (err: any) {
+          showNotification(`${t('notification.delete_failed')}: ${err?.message || ''}`, 'error');
+        }
+      }
+    });
   };
 
   const actionButtons = (
@@ -181,8 +183,7 @@ export function ApiKeysPage() {
                     variant="danger"
                     size="sm"
                     onClick={() => handleDelete(index)}
-                    disabled={disableControls || deletingIndex === index}
-                    loading={deletingIndex === index}
+                    disabled={disableControls}
                   >
                     {t('common.delete')}
                   </Button>

src/stores/useNotificationStore.ts

@@ -8,15 +8,38 @@ import type { Notification, NotificationType } from '@/types';
 import { generateId } from '@/utils/helpers';
 import { NOTIFICATION_DURATION_MS } from '@/utils/constants';
 
+interface ConfirmationOptions {
+  title?: string;
+  message: string;
+  confirmText?: string;
+  cancelText?: string;
+  variant?: 'danger' | 'primary' | 'secondary';
+  onConfirm: () => void | Promise<void>;
+  onCancel?: () => void;
+}
+
 interface NotificationState {
   notifications: Notification[];
+  confirmation: {
+    isOpen: boolean;
+    isLoading: boolean;
+    options: ConfirmationOptions | null;
+  };
   showNotification: (message: string, type?: NotificationType, duration?: number) => void;
   removeNotification: (id: string) => void;
   clearAll: () => void;
+  showConfirmation: (options: ConfirmationOptions) => void;
+  hideConfirmation: () => void;
+  setConfirmationLoading: (loading: boolean) => void;
 }
 
 export const useNotificationStore = create<NotificationState>((set) => ({
   notifications: [],
+  confirmation: {
+    isOpen: false,
+    isLoading: false,
+    options: null
+  },
 
   showNotification: (message, type = 'info', duration = NOTIFICATION_DURATION_MS) => {
     const id = generateId();
@@ -49,5 +72,34 @@ export const useNotificationStore = create<NotificationState>((set) => ({
 
   clearAll: () => {
     set({ notifications: [] });
+  },
+
+  showConfirmation: (options) => {
+    set({
+      confirmation: {
+        isOpen: true,
+        isLoading: false,
+        options
+      }
+    });
+  },
+
+  hideConfirmation: () => {
+    set((state) => ({
+      confirmation: {
+        ...state.confirmation,
+        isOpen: false,
+        options: null // Cleanup
+      }
+    }));
+  },
+
+  setConfirmationLoading: (loading) => {
+    set((state) => ({
+      confirmation: {
+        ...state.confirmation,
+        isLoading: loading
+      }
+    }));
   }
 }));