agenda: centralize FullCalendar touch defaults

Sem long-press delays customizados, tap em slot vazio precisa de 1000ms
antes de disparar select — diverge totalmente do mouse (clique abre na
hora). Mesmo problema em eventDrop. Move pra utils/fcDefaults.js e
aplica nos 4 calendars (AgendaCalendar, AgendaClinicMosaic,
AgendaTerapeutaPage, MelissaAgenda no proximo commit).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/features/agenda/components/AgendaCalendar.vue

@@ -23,6 +23,7 @@ import interactionPlugin from '@fullcalendar/interaction';
 import dayGridPlugin from '@fullcalendar/daygrid';
 
 import ProgressSpinner from 'primevue/progressspinner';
+import { FC_TOUCH_DEFAULTS } from '@/features/agenda/utils/fcDefaults';
 
 const props = defineProps({
     // UI
@@ -71,6 +72,7 @@ const calendarOptions = computed(() => {
     const maxTime = isWorkHours ? props.slotMaxTime : '23:59:59';
 
     return {
+        ...FC_TOUCH_DEFAULTS,
         plugins: [timeGridPlugin, interactionPlugin, dayGridPlugin],
         initialView: initialView.value,