merge: integrar origin/main (Beszel já existente; mantém rotas stack-observer e observer-tickets e restaura /api/ai)

api/server.ts

@@ -137,6 +137,7 @@ app.use('/api/financial', financialRouter)
 app.use('/api/mcps', mcpsRouter)
 app.use('/api/n8n', n8nRouter)
 app.use('/api/paperclip', paperclipRouter)
+app.use('/api/ai', aiRouter)
 app.use('/api/operations', operationsRouter)
 app.use('/api/stack-observer', stackObserverRouter)
 app.use('/api/beszel', beszelRouter)