fix: mejorar detección de pérdida de autenticación con Authentik

- Detectar errores "Failed to fetch" y "no response" como pérdida de auth
- Mejor logging para debugging de cambios de estado
- Manejar correctamente redirects 302 de Authentik en fetch

components/AuthIndicator.client.vue

@@ -66,8 +66,16 @@ watch(() => musicStore.error, (error, oldError) => {
   if (error && error !== oldError) {
     console.log('[AuthIndicator] Music store error detected:', error)
 
-    if (error.includes('401') || error.includes('403') ||
-        error.includes('Unauthorized') || error.includes('Forbidden')) {
+    // Detectar errores de autenticación (múltiples formas)
+    const isAuthError =
+      error.includes('401') ||
+      error.includes('403') ||
+      error.includes('Unauthorized') ||
+      error.includes('Forbidden') ||
+      error.includes('Failed to fetch') || // Authentik redirect genera esto
+      error.includes('no response')        // Nuxt $fetch sin respuesta
+
+    if (isAuthError) {
       // Auth error detected - mark as unauthenticated immediately
       console.log('[AuthIndicator] Auth error detected, updating status')
       markUnauthenticated()
@@ -80,8 +88,15 @@ watch(() => musicStore.loading, (loading, wasLoading) => {
   if (wasLoading && !loading && musicStore.error) {
     // Terminó de cargar con error, verificar si es de auth
     const error = musicStore.error
-    if (error.includes('401') || error.includes('403') ||
-        error.includes('Unauthorized') || error.includes('Forbidden')) {
+    const isAuthError =
+      error.includes('401') ||
+      error.includes('403') ||
+      error.includes('Unauthorized') ||
+      error.includes('Forbidden') ||
+      error.includes('Failed to fetch') ||
+      error.includes('no response')
+
+    if (isAuthError) {
       markUnauthenticated()
     }
   }

composables/useAuth.ts

@@ -48,20 +48,37 @@ export const useAuth = () => {
         console.log('[Auth] Status changed:', isAuthenticated.value ? 'authenticated' : 'unauthenticated')
       }
     } catch (error: any) {
-      // TypeError: Failed to fetch = probablemente redirect de Authentik (no autenticado)
-      // o error de red real
+      // Con redirect: 'error', cualquier redirect (302) genera "Failed to fetch"
+      // Authentik redirige a login cuando no estás autenticado = 302
       console.warn('[Auth] Check failed:', error.message)
 
-      // Si el error es por redirect (Authentik intenta redirigir a login), no estamos autenticados
-      if (error.message && error.message.includes('redirect')) {
-        const wasAuthenticated = isAuthenticated.value
+      const wasAuthenticated = isAuthenticated.value
+
+      // "Failed to fetch" con redirect: 'error' configurado = sesión expirada
+      // Authentik intenta redirigir (302) pero fetch lo rechaza y genera error
+      if (error.message && error.message.includes('Failed to fetch')) {
+        console.log('[Auth] Failed to fetch detected - marking as unauthenticated')
         isAuthenticated.value = false
         authChecked.value = true
         if (wasAuthenticated) {
-          console.log('[Auth] Status changed: unauthenticated (redirect detected)')
+          console.log('[Auth] Status changed: authenticated → unauthenticated (Authentik redirect detected)')
+        } else {
+          console.log('[Auth] Confirmed unauthenticated state')
         }
+      } else if (error.name === 'TypeError' && error.message.includes('fetch')) {
+        // Otro tipo de TypeError fetch = también probablemente redirect
+        console.log('[Auth] TypeError fetch detected - marking as unauthenticated')
+        isAuthenticated.value = false
+        authChecked.value = true
+        if (wasAuthenticated) {
+          console.log('[Auth] Status changed: authenticated → unauthenticated (fetch error)')
+        } else {
+          console.log('[Auth] Confirmed unauthenticated state')
+        }
+      } else {
+        // Otro tipo de error (timeout, etc) - mantener estado actual
+        console.log('[Auth] Network error (not auth related), maintaining current state:', error.name)
       }
-      // Si no, mantenemos el estado actual (puede ser error de red temporal)
 
       lastCheckTime.value = now
     } finally {