Initial commit: Vuelato - buscador de vuelos

Nuxt 4 + Supabase + Flightics API. Incluye búsqueda de vuelos,
inspiraciones, watchlist, tracking de precios y mapa interactivo.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/composables/useUserPreferences.ts

@@ -0,0 +1,62 @@
+interface UserProfile {
+  home_airports: string[]
+  default_adults: number
+  default_children: number
+  default_infants: number
+  locale: string
+  show_origin_time: boolean
+}
+
+export function useUserPreferences() {
+  const user = useSupabaseUser()
+  const profile = useState<UserProfile | null>('user-profile', () => null)
+  const loading = useState<boolean>('user-profile-loading', () => false)
+
+  let fetchPromise: Promise<void> | null = null
+
+  async function fetchProfile() {
+    if (!user.value) return
+    if (fetchPromise) return fetchPromise
+    loading.value = true
+    fetchPromise = (async () => {
+      try {
+        const data = await $fetch<UserProfile>('/api/profile')
+        profile.value = data
+      } catch {
+        profile.value = null
+      } finally {
+        loading.value = false
+        fetchPromise = null
+      }
+    })()
+    return fetchPromise
+  }
+
+  async function updateProfile(updates: Partial<UserProfile>) {
+    if (!user.value) return
+    try {
+      const data = await $fetch<UserProfile>('/api/profile', {
+        method: 'PATCH',
+        body: updates
+      })
+      profile.value = data
+    } catch {
+      // silent
+    }
+  }
+
+  const homeAirports = computed(() => profile.value?.home_airports ?? [])
+
+  const defaultPassengers = computed(() => ({
+    adult: profile.value?.default_adults ?? 1,
+    child: profile.value?.default_children ?? 0,
+    infant: profile.value?.default_infants ?? 0
+  }))
+
+  watch(user, (u) => {
+    if (u) fetchProfile()
+    else profile.value = null
+  }, { immediate: true })
+
+  return { profile, loading, homeAirports, defaultPassengers, fetchProfile, updateProfile }
+}