Fix: Usar DropdownMenu de radix-vue para menú de configuración

- Reemplaza dropdown manual por componente DropdownMenu con radix-vue
- Agrega avoid-collisions y collision-padding para posicionamiento automático
- El menú ahora se ajusta automáticamente cuando no hay espacio horizontal
- Actualiza DropdownMenuItem para soportar prop 'as' y 'href' para enlaces

frontend/src/App.vue

@@ -1,6 +1,6 @@
 <script setup>
 import { onMounted, reactive, ref, computed, watch } from 'vue';
-import { Button, Badge, Input, Card, CardHeader, CardTitle, CardActions, CardContent, Textarea } from '@/components/ui';
+import { Button, Badge, Input, Card, CardHeader, CardTitle, CardActions, CardContent, Textarea, DropdownMenu, DropdownMenuItem, DropdownMenuSeparator } from '@/components/ui';
 import EventCard from '@/components/EventCard.vue';
 import UserCard from '@/components/UserCard.vue';
 import DispositivoCard from '@/components/DispositivoCard.vue';
@@ -45,7 +45,6 @@ const mainCollapsed = ref(false);
 const layoutMode = ref('user');
 const theme = ref(localStorage.getItem('theme') || 'dark');
 const statusText = ref('OK');
-const showSettingsMenu = ref(false);
 const showInfoModal = ref(false);
 
 async function fetchUsers() {
@@ -305,13 +304,12 @@ function openAddGuest() {
   userFormModel.value = { username:'', password:'', vlan:'5', disabled:false, etiquetas: ['invitado'] };
   showUserForm.value = true;
 }
-function toggleSettingsMenu() { showSettingsMenu.value = !showSettingsMenu.value; }
 const showRawDb = ref(false);
 const rawDbFullscreen = ref(false);
-function openRawDb() { showSettingsMenu.value = false; showRawDb.value = true; }
+function openRawDb() { showRawDb.value = true; }
 function closeRawDb() { showRawDb.value = false; }
 const showVlan = ref(false);
-function openVlanForm() { showSettingsMenu.value = false; showVlan.value = true; }
+function openVlanForm() { showVlan.value = true; }
 function closeVlan() { showVlan.value = false; }
 function onVlanCreated() { showVlan.value = false; }
 const showDevice = ref(false);
@@ -426,22 +424,23 @@ async function handleUserFormSubmit(data) {
         <img class="size-4 opacity-90" src="/icons/guest.svg" alt="invitado"> Invitado
       </Button>
       <UserDropdown />
-      <div class="relative">
-        <Button @click="toggleSettingsMenu">
-          <img class="size-4 opacity-90" src="/icons/settings.svg" alt="config"> Configuración
-        </Button>
-        <div v-if="showSettingsMenu" class="absolute right-0 top-full mt-1.5 glass-card p-1.5 min-w-[200px] shadow-lg border border-pink-200 dark:border-pink-600/50 z-50 space-y-1">
-          <Button variant="ghost" class="w-full justify-start" @click="openRawDb">ver rawDB</Button>
-          <Button variant="ghost" class="w-full justify-start" @click="openVlanForm">crear VLAN</Button>
-          <hr class="border-border my-1" />
-          <Button as="a" variant="ghost" class="w-full justify-start" href="/api/users.csv">Exportar usuarios CSV</Button>
-          <Button as="a" variant="ghost" class="w-full justify-start" href="/api/devices.csv">Exportar dispositivos CSV</Button>
-          <Button as="a" variant="ghost" class="w-full justify-start" href="/api/vlans.csv">Exportar VLANs CSV</Button>
-          <Button variant="ghost" class="w-full justify-start" @click="openImport('users')">Importar usuarios CSV</Button>
-          <Button variant="ghost" class="w-full justify-start" @click="openImport('devices')">Importar dispositivos CSV</Button>
-          <Button variant="ghost" class="w-full justify-start" @click="openImport('vlans')">Importar VLANs CSV</Button>
-        </div>
-      </div>
+      <DropdownMenu align="end">
+        <template #trigger>
+          <Button>
+            <img class="size-4 opacity-90" src="/icons/settings.svg" alt="config"> Configuración
+          </Button>
+        </template>
+        <DropdownMenuItem @click="openRawDb">ver rawDB</DropdownMenuItem>
+        <DropdownMenuItem @click="openVlanForm">crear VLAN</DropdownMenuItem>
+        <DropdownMenuSeparator />
+        <DropdownMenuItem as="a" href="/api/users.csv">Exportar usuarios CSV</DropdownMenuItem>
+        <DropdownMenuItem as="a" href="/api/devices.csv">Exportar dispositivos CSV</DropdownMenuItem>
+        <DropdownMenuItem as="a" href="/api/vlans.csv">Exportar VLANs CSV</DropdownMenuItem>
+        <DropdownMenuSeparator />
+        <DropdownMenuItem @click="openImport('users')">Importar usuarios CSV</DropdownMenuItem>
+        <DropdownMenuItem @click="openImport('devices')">Importar dispositivos CSV</DropdownMenuItem>
+        <DropdownMenuItem @click="openImport('vlans')">Importar VLANs CSV</DropdownMenuItem>
+      </DropdownMenu>
     </div>
   </header>
 

frontend/src/components/ui/dropdown-menu/DropdownMenu.vue

@@ -6,7 +6,7 @@ import {
   DropdownMenuContent
 } from 'radix-vue';
 
-const props = defineProps({
+defineProps({
   align: {
     type: String,
     default: 'end'
@@ -14,6 +14,14 @@ const props = defineProps({
   side: {
     type: String,
     default: 'bottom'
+  },
+  sideOffset: {
+    type: Number,
+    default: 6
+  },
+  collisionPadding: {
+    type: [Number, Object],
+    default: 8
   }
 });
 </script>
@@ -28,7 +36,9 @@ const props = defineProps({
       <DropdownMenuContent
         :align="align"
         :side="side"
-        :side-offset="6"
+        :side-offset="sideOffset"
+        :collision-padding="collisionPadding"
+        :avoid-collisions="true"
         class="z-50 min-w-[180px] glass-card p-1.5 shadow-lg border border-pink-200 dark:border-pink-600/50 animate-slide-in"
       >
         <slot />

frontend/src/components/ui/dropdown-menu/DropdownMenuItem.vue

@@ -6,7 +6,12 @@ import { cn } from '@/lib/utils';
 const props = defineProps({
   disabled: Boolean,
   danger: Boolean,
-  class: String
+  class: String,
+  as: {
+    type: [String, Object],
+    default: undefined
+  },
+  href: String
 });
 
 const classes = computed(() => cn(
@@ -17,10 +22,12 @@ const classes = computed(() => cn(
   props.danger && 'hover:border-red-400/30 hover:text-red-400',
   props.class
 ));
+
+const elementAs = computed(() => props.as || (props.href ? 'a' : undefined));
 </script>
 
 <template>
-  <DropdownMenuItem :disabled="disabled" :class="classes">
+  <DropdownMenuItem :as="elementAs" :href="href" :disabled="disabled" :class="classes">
     <slot />
   </DropdownMenuItem>
 </template>