fix(activities): buy-tickets login toast gets a Log in action button

Matches the pattern already used by BookmarkButton, RSVPButton, and
ActivitiesFavoritesPage — the auth-prompt toast carries an inline
"Log in" action that pushes /login. The buy-tickets toast was the
odd one out, leaving the buyer to find the login route themselves.

Also lifts the message + button label into i18n
(activities.detail.loginToBuyTickets, .logIn) so es/fr aren't
English-on-top.

src/i18n/locales/en.ts

@@ -107,6 +107,8 @@ const messages: LocaleMessages = {
       viewMyTickets: 'View in My Tickets',
       soldOut: 'Sold Out',
       pastEvent: 'This event has already happened',
+      loginToBuyTickets: 'Log in to buy tickets',
+      logIn: 'Log in',
       free: 'Free',
     },
     tickets: {

src/i18n/locales/es.ts

@@ -107,6 +107,8 @@ const messages: LocaleMessages = {
       viewMyTickets: 'Ver en Mis boletos',
       soldOut: 'Agotado',
       pastEvent: 'Este evento ya pasó',
+      loginToBuyTickets: 'Inicia sesión para comprar boletos',
+      logIn: 'Iniciar sesión',
       free: 'Gratis',
     },
     tickets: {

src/i18n/locales/fr.ts

@@ -107,6 +107,8 @@ const messages: LocaleMessages = {
       viewMyTickets: 'Voir dans Mes billets',
       soldOut: 'Épuisé',
       pastEvent: 'Cet événement est déjà passé',
+      loginToBuyTickets: 'Connectez-vous pour acheter des billets',
+      logIn: 'Connexion',
       free: 'Gratuit',
     },
     tickets: {

src/i18n/types.ts

@@ -82,6 +82,8 @@ export interface LocaleMessages {
       viewMyTickets: string
       soldOut: string
       pastEvent: string
+      loginToBuyTickets: string
+      logIn: string
       free: string
     }
     tickets: {

src/modules/activities/views/ActivityDetailPage.vue

@@ -145,7 +145,12 @@ const showPurchaseDialog = ref(false)
 
 function openPurchaseDialog() {
   if (!isAuthenticated.value) {
-    toastService.info('Log in to buy tickets')
+    toastService.info(t('activities.detail.loginToBuyTickets'), {
+      action: {
+        label: t('activities.detail.logIn'),
+        onClick: () => router.push('/login'),
+      },
+    })
     return
   }
   showPurchaseDialog.value = true