feat(events): filter the feed by day via the calendar popup

The calendar button now opens the date-picker popup instead of
navigating to a separate page. Picking a day filters the feed to that
day (button highlights while active) and shows a removable date chip
whose ✕ clears ONLY the date selection — distinct from category
clearing, which keeps its own clear in the filter dropdown. Dots in the
popup come from the full (unfiltered) event set.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/modules/events/views/EventsPage.vue

@@ -8,7 +8,8 @@ import {
   CollapsibleContent,
   CollapsibleTrigger,
 } from '@/components/ui/collapsible'
-import { SlidersHorizontal, CalendarDays, Plus } from 'lucide-vue-next'
+import { SlidersHorizontal, CalendarDays, Plus, X } from 'lucide-vue-next'
+import { format } from 'date-fns'
 import brandAppLogoUrl from '@brand-app-logo?url'
 import brandAppBannerUrl from '@brand-app-banner?url'
 // Brand name flows through VITE_APP_NAME (set in vite.events.config.ts
@@ -26,23 +27,30 @@ import { useEventsStore } from '../stores/events'
 import EventSearchOverlay from '../components/EventSearchOverlay.vue'
 import TemporalFilterBar from '../components/TemporalFilterBar.vue'
 import CategoryFilterBar from '../components/CategoryFilterBar.vue'
+import EventCalendarPopup from '../components/EventCalendarPopup.vue'
 import EventList from '../components/EventList.vue'
+import { useDateLocale } from '../composables/useDateLocale'
 import type { Event } from '../types/event'
 
 const router = useRouter()
 const { t } = useI18n()
+const { dateLocale } = useDateLocale()
 const eventsStore = useEventsStore()
 
 const {
   events,
+  allEvents,
   isLoading,
   error,
   temporal,
   selectedCategories,
+  selectedDate,
   hasActiveFilters,
   showPast,
   onlyHosting,
   setTemporal,
+  selectDate,
+  clearSelectedDate,
   toggleCategory,
   clearCategories,
   togglePast,
@@ -51,6 +59,14 @@ const {
 } = useEvents()
 
 const filtersOpen = ref(false)
+const calendarOpen = ref(false)
+
+// Human label for the active day filter, shown as a removable chip.
+const selectedDateLabel = computed(() =>
+  selectedDate.value
+    ? format(selectedDate.value, 'EEE, MMM d', { locale: dateLocale.value })
+    : '',
+)
 
 // Badge count on the Filters trigger so the user can see at a glance
 // that hidden toggles (categories) are currently active even when the
@@ -77,8 +93,9 @@ function openCreate() {
   eventsStore.showCreateDialog = true
 }
 
-function openCalendar() {
-  router.push('/events/calendar')
+function onSelectDate(date: Date) {
+  // The popup closes itself; just apply the day filter.
+  selectDate(date)
 }
 </script>
 
@@ -161,15 +178,16 @@ function openCalendar() {
             @toggle-past="togglePast"
           />
         </div>
-        <!-- Calendar shortcut — sits at the end of the filter row next to
-             the temporal pills (the week-day strip was removed in favour
-             of the calendar for picking specific dates). -->
+        <!-- Calendar shortcut — opens the date-picker popup to filter the
+             feed to a single day. Highlighted while a day filter is
+             active. -->
         <Button
           variant="ghost"
           size="icon"
           class="h-8 w-8 shrink-0"
+          :class="{ 'bg-accent text-accent-foreground': selectedDate }"
           :aria-label="t('events.nav.calendar')"
-          @click="openCalendar"
+          @click="calendarOpen = true"
         >
           <CalendarDays class="h-4 w-4" />
         </Button>
@@ -183,6 +201,23 @@ function openCalendar() {
       </CollapsibleContent>
     </Collapsible>
 
+    <!-- Active day-filter chip — removing it clears ONLY the date
+         selection (categories have their own clear in the filter
+         dropdown). Shown when a day is picked from the calendar popup. -->
+    <div v-if="selectedDate" class="mb-3 flex">
+      <Button
+        variant="secondary"
+        size="sm"
+        class="h-7 gap-1.5"
+        :aria-label="t('events.filters.clearDate', 'Clear date filter')"
+        @click="clearSelectedDate"
+      >
+        <CalendarDays class="w-3.5 h-3.5" />
+        {{ selectedDateLabel }}
+        <X class="w-3.5 h-3.5" />
+      </Button>
+    </div>
+
     <!-- Create-activity CTA — shown when the Hosting bottom-nav tab is
          active. Replaces the dedicated Create entry that used to live
          in the bottom nav; lives here so it shows up exactly when the
@@ -210,5 +245,15 @@ function openCalendar() {
       :compact="onlyHosting"
       @select="handleSelectEvent"
     />
+
+    <!-- Date-picker popup: month grid with per-day event dots. Picking a
+         day filters the feed to it and closes. -->
+    <EventCalendarPopup
+      v-model:open="calendarOpen"
+      :events="allEvents"
+      :title="t('events.nav.calendar', 'Calendar')"
+      :description="t('events.calendar.pickDay', 'Pick a day to see its events')"
+      @select-date="onSelectDate"
+    />
   </div>
 </template>