Filter detected sellers from conversations

tests/dashboard/conversations.test.tsx

@@ -17,6 +17,7 @@ interface ChatFixtureOptions {
   isFromUs?: boolean;
   lastMessageSnippet?: string;
   hasReceivedImages?: boolean;
+  sellerDetected?: boolean;
 }
 
 function chatFixture(options: ChatFixtureOptions) {
@@ -30,6 +31,7 @@ function chatFixture(options: ChatFixtureOptions) {
     isFromUs: options.isFromUs ?? false,
     unread: options.unread ?? false,
     ...(options.hasReceivedImages === undefined ? {} : { hasReceivedImages: options.hasReceivedImages }),
+    ...(options.sellerDetected === undefined ? {} : { sellerDetected: options.sellerDetected }),
   };
 }
 
@@ -149,6 +151,20 @@ describe('ConversationsPage', () => {
     expect(screen.getByRole('img', { name: 'Source post: Looking for a chat' })).not.toHaveClass('is-blurred');
   });
 
+  it('hides detected sellers by default and reveals marked conversations on request', async () => {
+    const seller = chatFixture({ username: 'seller', roomId: 'room-seller', sellerDetected: true });
+    server.use(http.get('/api/conversations', () => HttpResponse.json([alice, seller])));
+    const user = userEvent.setup();
+    renderConversations();
+
+    expect(await screen.findByRole('button', { name: /u\/alice/ })).toBeInTheDocument();
+    expect(screen.queryByRole('button', { name: /u\/seller/ })).not.toBeInTheDocument();
+
+    await user.click(screen.getByRole('checkbox', { name: 'Show sellers' }));
+    expect(screen.getByRole('button', { name: /u\/seller.*Seller/ })).toBeInTheDocument();
+    expect(screen.getByText('Seller')).toBeInTheDocument();
+  });
+
   it('orders conversations by latest message activity', async () => {
     const oldest = chatFixture({ username: 'oldest', roomId: 'room-oldest', lastMessageTime: 100 });
     const newest = chatFixture({ username: 'newest', roomId: 'room-newest', lastMessageTime: 300 });