correcao de erro de login

frontend/src/App.jsx

@@ -39,6 +39,21 @@ export default function App() {
   const logsEnabled = Boolean(logsStatus?.enabled)
   const logsDisabledReason = String(logsStatus?.reason || 'Logs indisponíveis')
 
+  function resetToLogin(message = '') {
+    setAuthToken('')
+    setAuthUser(null)
+    setAuthLoading(false)
+    setLoginLoading(false)
+    setSessionId('')
+    setBootError('')
+    setLogsStatus(null)
+    setLogsOpen(false)
+    setLogsEvents([])
+    setLogsError('')
+    setActiveTab(TABS[0].key)
+    setAuthError(message)
+  }
+
   useEffect(() => {
     let mounted = true
 
@@ -69,6 +84,18 @@ export default function App() {
     }
   }, [])
 
+  useEffect(() => {
+    function onAuthRequired(event) {
+      const message = String(event?.detail?.message || '').trim() || 'Sessão expirada. Faça login novamente.'
+      resetToLogin(message)
+    }
+    if (typeof window !== 'undefined') {
+      window.addEventListener('mesa:auth-required', onAuthRequired)
+      return () => window.removeEventListener('mesa:auth-required', onAuthRequired)
+    }
+    return undefined
+  }, [])
+
   useEffect(() => {
     let mounted = true
 
@@ -88,7 +115,9 @@ export default function App() {
         setBootError('')
       })
       .catch((err) => {
-        if (mounted) setBootError(err.message || 'Falha ao criar sessão')
+        if (!mounted) return
+        if (Number(err?.status) === 401) return
+        setBootError(err.message || 'Falha ao criar sessão')
       })
 
     return () => {
@@ -137,14 +166,7 @@ export default function App() {
     } catch {
       // Ignore falha de logout remoto para garantir limpeza local.
     }
-    setAuthToken('')
-    setAuthUser(null)
-    setSessionId('')
-    setLogsStatus(null)
-    setLogsOpen(false)
-    setLogsEvents([])
-    setLogsError('')
-    setActiveTab(TABS[0].key)
+    resetToLogin('')
   }
 
   async function carregarLogsStatus() {

frontend/src/api.js

@@ -27,7 +27,13 @@ function authHeaders(extraHeaders = {}) {
   return headers
 }
 
-async function handleResponse(response) {
+function emitAuthRequired(detail = 'Login obrigatorio') {
+  if (typeof window === 'undefined') return
+  const event = new CustomEvent('mesa:auth-required', { detail: { message: detail } })
+  window.dispatchEvent(event)
+}
+
+async function handleResponse(response, path = '') {
   if (!response.ok) {
     let detail = 'Erro inesperado'
     try {
@@ -36,7 +42,14 @@ async function handleResponse(response) {
     } catch {
       detail = response.statusText || detail
     }
-    throw new Error(detail)
+    if (response.status === 401 && path !== '/api/auth/login') {
+      setAuthToken('')
+      emitAuthRequired(detail)
+    }
+    const error = new Error(detail)
+    error.status = response.status
+    error.path = path
+    throw error
   }
   return response
 }
@@ -47,7 +60,7 @@ async function postJson(path, body) {
     headers: authHeaders({ 'Content-Type': 'application/json' }),
     body: JSON.stringify(body),
   })
-  await handleResponse(response)
+  await handleResponse(response, path)
   return response.json()
 }
 
@@ -57,19 +70,19 @@ async function postForm(path, formData) {
     headers: authHeaders(),
     body: formData,
   })
-  await handleResponse(response)
+  await handleResponse(response, path)
   return response.json()
 }
 
 async function getJson(path) {
   const response = await fetch(`${API_BASE}${path}`, { headers: authHeaders() })
-  await handleResponse(response)
+  await handleResponse(response, path)
   return response.json()
 }
 
 async function getBlob(path) {
   const response = await fetch(`${API_BASE}${path}`, { headers: authHeaders() })
-  await handleResponse(response)
+  await handleResponse(response, path)
   return response.blob()
 }
 
@@ -183,7 +196,7 @@ export const api = {
       headers: authHeaders({ 'Content-Type': 'application/json' }),
       body: JSON.stringify({ session_id: sessionId, nome_arquivo: nomeArquivo, elaborador }),
     })
-    await handleResponse(response)
+    await handleResponse(response, '/api/elaboracao/export-model')
     return response.blob()
   },
   exportBase: (sessionId, filtered = true) => getBlob(`/api/elaboracao/export-base?session_id=${encodeURIComponent(sessionId)}&filtered=${String(filtered)}`),