feat(admin): exibir mensagem de erro no detalhe da máquina quando Convex/fallback falham e oferecer retry; prioriza caminho Convex e esclarece 404

src/components/admin/machines/admin-machine-details.client.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useMemo, useRef, useState } from "react"
 import { useQuery } from "convex/react"
+import { useRouter } from "next/navigation"
 import { api } from "@/convex/_generated/api"
 import {
   MachineDetails,
@@ -10,9 +11,11 @@ import {
 } from "@/components/admin/machines/admin-machines-overview"
 import { Card, CardContent } from "@/components/ui/card"
 import { Skeleton } from "@/components/ui/skeleton"
+import { Button } from "@/components/ui/button"
 import type { Id } from "@/convex/_generated/dataModel"
 
 export function AdminMachineDetailsClient({ tenantId, machineId }: { tenantId: string; machineId: string }) {
+  const router = useRouter()
   const single = useQuery(
     (api as any).machines.getById,
     machineId ? ({ id: machineId as Id<"machines">, includeMetadata: true } as const) : ("skip" as const)
@@ -23,6 +26,8 @@ export function AdminMachineDetailsClient({ tenantId, machineId }: { tenantId: s
 
   // Fallback via HTTP in caso de o Convex React demorar/ficar preso em loading
   const [fallback, setFallback] = useState<Record<string, unknown> | null>(null)
+  const [loadError, setLoadError] = useState<string | null>(null)
+  const [retryTick, setRetryTick] = useState(0)
   const timer = useRef<ReturnType<typeof setTimeout> | null>(null)
   const shouldLoad = single === undefined && !fallback && Boolean(machineId)
 
@@ -34,16 +39,41 @@ export function AdminMachineDetailsClient({ tenantId, machineId }: { tenantId: s
         if (res.ok) {
           const data = (await res.json()) as Record<string, unknown>
           setFallback(data)
+          setLoadError(null)
+        } else {
+          // Not found (404) ou erro de servidor
+          let message = `Falha ao carregar (HTTP ${res.status})`
+          try {
+            const payload = (await res.json()) as Record<string, unknown>
+            if (typeof payload?.error === "string" && payload.error) {
+              message = payload.error
+            }
+          } catch {
+            // ignore parse error
+          }
+          setLoadError(message)
         }
-      } catch {
+      } catch (err) {
-        // ignore
+        setLoadError("Erro de rede ao carregar os dados da máquina.")
       }
-    }, 300)
+    }, 600)
     return () => {
       if (timer.current) clearTimeout(timer.current)
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [shouldLoad, machineId])
+  }, [shouldLoad, machineId, retryTick])
+
+  // Timeout de proteção: se depois de X segundos ainda estiver carregando e sem fallback, mostra erro claro
+  useEffect(() => {
+    if (!shouldLoad) return
+    const timeout = setTimeout(() => {
+      setLoadError(
+        "Tempo esgotado ao consultar os dados (Convex). Verifique sua conexão e tente novamente."
+      )
+    }, 10_000)
+    return () => clearTimeout(timeout)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [shouldLoad, machineId, retryTick])
 
   const machine: MachinesQueryItem | null = useMemo(() => {
     const source = single ?? fallback
@@ -51,6 +81,19 @@ export function AdminMachineDetailsClient({ tenantId, machineId }: { tenantId: s
     return normalizeMachineItem(source)
   }, [single, fallback])
   const isLoading = single === undefined && !fallback
+  const isNotFound = single === null && !fallback
+
+  const onRetry = () => {
+    setLoadError(null)
+    setFallback(null)
+    setRetryTick((t) => t + 1)
+    // força revalidação de RSC/convex subscription
+    try {
+      router.refresh()
+    } catch {
+      // ignore
+    }
+  }
 
   if (isLoading) {
     return (
@@ -64,5 +107,35 @@ export function AdminMachineDetailsClient({ tenantId, machineId }: { tenantId: s
     )
   }
 
+  if (isNotFound) {
+    return (
+      <Card>
+        <CardContent className="space-y-3 p-6">
+          <p className="text-sm font-medium text-red-600">Máquina não encontrada</p>
+          <p className="text-sm text-muted-foreground">
+            Verifique o identificador e tente novamente.
+          </p>
+          <div className="pt-2">
+            <Button size="sm" onClick={onRetry}>Tentar novamente</Button>
+          </div>
+        </CardContent>
+      </Card>
+    )
+  }
+
+  if (loadError && !machine) {
+    return (
+      <Card>
+        <CardContent className="space-y-3 p-6">
+          <p className="text-sm font-medium text-red-600">Falha ao carregar os dados da máquina</p>
+          <p className="text-sm text-muted-foreground">{loadError}</p>
+          <div className="pt-2 flex items-center gap-2">
+            <Button size="sm" onClick={onRetry}>Tentar novamente</Button>
+          </div>
+        </CardContent>
+      </Card>
+    )
+  }
+
   return <MachineDetails machine={machine} />
 }