Add user info header to authentication dropdown

- Created /api/auth/userinfo endpoint to fetch user data from Authentik headers
- Added userInfo state and fetchUserInfo() function to useAuth composable
- Implemented compact user info header in dropdown with avatar, name, and email
- Avatar shows user initials with gradient background
- Styled with glassmorphism design matching app aesthetic

components/AuthIndicator.client.vue

@@ -30,6 +30,19 @@
           :style="dropdownStyle"
           @click.stop
         >
+          <!-- User Info Header -->
+          <div v-if="userInfo" class="user-info-header">
+            <div class="user-avatar">
+              {{ userInfo.initials }}
+            </div>
+            <div class="user-details">
+              <div class="user-name">{{ userInfo.name }}</div>
+              <div class="user-email">{{ userInfo.email }}</div>
+            </div>
+          </div>
+
+          <div class="dropdown-divider"></div>
+
           <button class="dropdown-item" @click="handleVerifyAuth">
             <RefreshCw :size="16" />
             <span>Verificar estado</span>
@@ -56,8 +69,10 @@ const {
   authChecked,
   isCheckingAuth,
   authStatus,
+  userInfo,
   checkAuth,
   triggerAuth,
+  fetchUserInfo,
   logout,
   markUnauthenticated,
   setupVisibilityListener,
@@ -76,6 +91,11 @@ onMounted(async () => {
   console.log('[AuthIndicator] Mounted - assuming authenticated (page loaded successfully)')
   setupVisibilityListener()
 
+  // Cargar información del usuario si estamos autenticados
+  if (isAuthenticated.value) {
+    await fetchUserInfo()
+  }
+
   // POLLING DESHABILITADO: Causa conflictos con Authentik cuando no estamos autenticados
   // En su lugar, confiamos en la detección reactiva de errores del musicStore
   console.log('[AuthIndicator] Polling disabled - relying on reactive error detection')
@@ -433,7 +453,7 @@ onUnmounted(() => {
 .auth-dropdown {
   position: fixed;
   z-index: 10000;
-  min-width: 200px;
+  min-width: 220px;
   border-radius: 12px;
   background: var(--bg-secondary);
   backdrop-filter: blur(50px);
@@ -445,6 +465,57 @@ onUnmounted(() => {
   overflow: hidden;
 }
 
+/* User Info Header */
+.user-info-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 10px 14px;
+  margin-bottom: 4px;
+}
+
+.user-avatar {
+  width: 40px;
+  height: 40px;
+  border-radius: 50%;
+  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 0.875rem;
+  font-weight: 600;
+  color: white;
+  flex-shrink: 0;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
+}
+
+.user-details {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+}
+
+.user-name {
+  font-size: 0.9rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  line-height: 1.3;
+}
+
+.user-email {
+  font-size: 0.75rem;
+  color: var(--text-secondary);
+  opacity: 0.7;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  line-height: 1.3;
+  margin-top: 2px;
+}
+
 .dropdown-item {
   width: 100%;
   display: flex;