feat: add KnowledgeConfirmDialog component and integrate delete confirmation dialog in KnowledgePage

tests/knowledge-page.test.tsx

@@ -21,7 +21,6 @@ vi.mock('../src/pages/Knowledge/copy', () => ({
       'knowledge.storageLabel': 'Storage',
       'knowledge.refresh': 'Refresh',
       'knowledge.upload': 'Upload',
-      'knowledge.uploadHint': 'Knowledge docs only',
       'knowledge.status.loading': 'Loading documents...',
       'knowledge.status.uploading': 'Uploading...',
       'knowledge.status.deleting': 'Deleting...',
@@ -29,7 +28,10 @@ vi.mock('../src/pages/Knowledge/copy', () => ({
       'knowledge.status.deleteSuccess': 'Deleted',
       'knowledge.emptyTitle': 'No documents yet',
       'knowledge.emptyDescription': 'Upload a file',
-      'knowledge.deleteConfirm': 'Delete this document?',
+      'knowledge.deleteDialog.title': 'Delete document?',
+      'knowledge.deleteDialog.confirm': 'Delete document',
+      'knowledge.deleteDialog.close': 'Close dialog',
+      'knowledge.common.cancel': 'Cancel',
       'knowledge.table.name': 'Name',
       'knowledge.table.size': 'Size',
       'knowledge.table.modifiedAt': 'Modified At',
@@ -42,6 +44,10 @@ vi.mock('../src/pages/Knowledge/copy', () => ({
       return `Knowledge docs request failed: ${params?.error ?? ''}`;
     }
 
+    if (path === 'knowledge.deleteDialog.description') {
+      return `This will permanently remove "${params?.name ?? ''}" from the local knowledge docs directory.`;
+    }
+
     return dictionary[path] ?? fallback ?? path;
   },
 }));
@@ -53,7 +59,6 @@ describe('KnowledgePage', () => {
     apiMocks.list.mockReset();
     apiMocks.upload.mockReset();
     apiMocks.delete.mockReset();
-    vi.stubGlobal('confirm', vi.fn(() => true));
   });
 
   it('loads and renders docs from the knowledge docs api', async () => {
@@ -87,6 +92,7 @@ describe('KnowledgePage', () => {
 
     const deleteButton = await screen.findByRole('button', { name: /delete/i });
     fireEvent.click(deleteButton);
+    fireEvent.click(screen.getByRole('button', { name: 'Delete document' }));
 
     await waitFor(() => {
       expect(apiMocks.delete).toHaveBeenCalledWith('guide.md');