feat(web): add plan mode controls

apps/cli/src/web.ts

@@ -37,6 +37,7 @@ const CLIENT_PACKAGES = [
   '@deepseek-ai/dsh-client-ui-layout',
   '@deepseek-ai/dsh-client-ui-sidebar',
   '@deepseek-ai/dsh-client-ui-conversation',
+  '@deepseek-ai/dsh-client-ui-plan',
   '@deepseek-ai/dsh-client-ui-question',
   '@deepseek-ai/dsh-client-ui-trajectory',
 ] as const