feat(search): add similar sessions UI in FlowPilot sidebar

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/flowpilot/FlowPilotSession.tsx

@@ -13,6 +13,7 @@ import { FlowPilotStepCard } from './FlowPilotStepCard'
 import { FlowPilotActionBar } from './FlowPilotActionBar'
 import { SessionDocView } from './SessionDocView'
 import { SessionTicketCard } from './SessionTicketCard'
+import { SimilarSessions } from './SimilarSessions'
 import { TicketPickerModal } from '@/components/session/TicketPickerModal'
 import { aiSessionsApi } from '@/api'
 import { toast } from '@/lib/toast'
@@ -185,6 +186,7 @@ export function FlowPilotSession({
                 </span>
               </div>
             )}
+            <SimilarSessions sessionId={session.id} />
           </div>
         )}
       </div>
@@ -291,6 +293,9 @@ export function FlowPilotSession({
                 </span>
               </div>
             </div>
+
+            {/* Similar sessions */}
+            <SimilarSessions sessionId={session.id} />
           </div>
         </div>
       </div>