feat(activities): capture optional start/end time on event creation

Fold a time into the existing event_start_date / event_end_date strings
("2026-05-25" or "2026-05-25T10:00") rather than introducing parallel
fields. Presence of "T" toggles which NIP-52 kind the events-extension
publisher emits (31922 date-only vs 31923 time-based).

CreateEventDialog gets optional HH:MM inputs next to the start date and
the (already-collapsible) end date — stacked below sm breakpoint so the
iPhone SE doesn't get the time pushed off-screen by the native date
input's intrinsic min-width.

EventsPage.formatDate shows the time portion when present.

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

src/modules/activities/components/CreateEventDialog.vue

@@ -62,7 +62,9 @@ const formSchema = toTypedSchema(z.object({
   name: z.string().min(1, "Title is required").max(200, "Title too long"),
   info: z.string().max(2000, "Description too long").optional().default(''),
   event_start_date: z.string().min(1, "Start date is required"),
+  event_start_time: z.string().optional().default(''),
   event_end_date: z.string().optional().default(''),
+  event_end_time: z.string().optional().default(''),
   location: z.string().max(500).optional().default(''),
   banner: z.string().optional().default(''),
   currency: z.string().default("sat"),
@@ -76,7 +78,9 @@ const form = useForm({
     name: '',
     info: '',
     event_start_date: '',
+    event_start_time: '',
     event_end_date: '',
+    event_end_time: '',
     location: '',
     banner: '',
     currency: 'sat',
@@ -85,6 +89,15 @@ const form = useForm({
   }
 })
 
+// Fold a date input ("YYYY-MM-DD") and an optional time input ("HH:MM")
+// into the events-extension wire format: date-only when no time given,
+// ISO 8601 datetime otherwise. The publisher switches NIP-52 kinds on
+// the "T" delimiter.
+function foldDateTime(date: string, time: string): string {
+  if (!date) return ''
+  return time ? `${date}T${time}` : date
+}
+
 const paymentService = injectService(SERVICE_TOKENS.PAYMENT_SERVICE)
 const ticketApi = injectService(SERVICE_TOKENS.TICKET_API) as TicketApiService | null
 
@@ -144,13 +157,21 @@ const onSubmit = form.handleSubmit(async (formValues) => {
   try {
     const eventData: CreateEventRequest = {
       name: formValues.name,
-      event_start_date: formValues.event_start_date,
+      event_start_date: foldDateTime(
+        formValues.event_start_date,
+        formValues.event_start_time
+      ),
       wallet: preferredWallet.id,
     }
 
     // Optional fields — only include if provided
     if (formValues.info) eventData.info = formValues.info
-    if (formValues.event_end_date) eventData.event_end_date = formValues.event_end_date
+    if (formValues.event_end_date) {
+      eventData.event_end_date = foldDateTime(
+        formValues.event_end_date,
+        formValues.event_end_time
+      )
+    }
     if (formValues.location) eventData.location = formValues.location
     if (formValues.banner) eventData.banner = formValues.banner
     if (formValues.currency) eventData.currency = formValues.currency
@@ -207,16 +228,28 @@ const handleOpenChange = (open: boolean) => {
             </FormItem>
           </FormField>
 
-          <!-- Start date (required) -->
+          <!-- Start date (required) + optional time -->
-          <FormField v-slot="{ componentField }" name="event_start_date">
+          <div class="grid grid-cols-1 sm:grid-cols-3 gap-3">
-            <FormItem>
+            <FormField v-slot="{ componentField }" name="event_start_date">
-              <FormLabel>Start date *</FormLabel>
+              <FormItem class="sm:col-span-2 min-w-0">
-              <FormControl>
+                <FormLabel>Start date *</FormLabel>
-                <Input type="date" :min="today" v-bind="componentField" />
+                <FormControl>
-              </FormControl>
+                  <Input type="date" :min="today" class="w-full" v-bind="componentField" />
-              <FormMessage />
+                </FormControl>
-            </FormItem>
+                <FormMessage />
-          </FormField>
+              </FormItem>
+            </FormField>
+
+            <FormField v-slot="{ componentField }" name="event_start_time">
+              <FormItem class="min-w-0">
+                <FormLabel>Start time</FormLabel>
+                <FormControl>
+                  <Input type="time" class="w-full" v-bind="componentField" />
+                </FormControl>
+                <FormMessage />
+              </FormItem>
+            </FormField>
+          </div>
 
           <!-- Description (optional, visible) -->
           <FormField v-slot="{ componentField }" name="info">
@@ -329,16 +362,28 @@ const handleOpenChange = (open: boolean) => {
             <CollapsibleContent class="space-y-4 pt-2">
               <Separator />
 
-              <FormField v-slot="{ componentField }" name="event_end_date">
+              <div class="grid grid-cols-1 sm:grid-cols-3 gap-3">
-                <FormItem>
+                <FormField v-slot="{ componentField }" name="event_end_date">
-                  <FormLabel>End date</FormLabel>
+                  <FormItem class="sm:col-span-2 min-w-0">
-                  <FormControl>
+                    <FormLabel>End date</FormLabel>
-                    <Input type="date" :min="today" v-bind="componentField" />
+                    <FormControl>
-                  </FormControl>
+                      <Input type="date" :min="today" class="w-full" v-bind="componentField" />
-                  <FormDescription class="text-xs">Defaults to start date if not set</FormDescription>
+                    </FormControl>
-                  <FormMessage />
+                    <FormDescription class="text-xs">Defaults to start date</FormDescription>
-                </FormItem>
+                    <FormMessage />
-              </FormField>
+                  </FormItem>
+                </FormField>
+
+                <FormField v-slot="{ componentField }" name="event_end_time">
+                  <FormItem class="min-w-0">
+                    <FormLabel>End time</FormLabel>
+                    <FormControl>
+                      <Input type="time" class="w-full" v-bind="componentField" />
+                    </FormControl>
+                    <FormMessage />
+                  </FormItem>
+                </FormField>
+              </div>
             </CollapsibleContent>
           </Collapsible>
 

src/modules/activities/types/nip52.ts

@@ -181,6 +181,14 @@ export function parseCalendarDateEvent(event: NostrEvent): CalendarDateEvent | n
 
   if (!dTag || !title || !start) return null
 
+  // NIP-52 kind 31922 requires YYYY-MM-DD. Reject anything else (including
+  // accidentally-published datetimes) so downstream parseIsoDate cannot
+  // produce an Invalid Date and crash the renderer.
+  const ISO_DATE = /^\d{4}-\d{2}-\d{2}$/
+  if (!ISO_DATE.test(start)) return null
+  const end = getTagValue(event.tags, 'end')
+  if (end && !ISO_DATE.test(end)) return null
+
   const participants: Participant[] = event.tags
     .filter(t => t[0] === 'p')
     .map(t => ({
@@ -197,7 +205,7 @@ export function parseCalendarDateEvent(event: NostrEvent): CalendarDateEvent | n
     content: event.content,
     image: getTagValue(event.tags, 'image'),
     start,
-    end: getTagValue(event.tags, 'end'),
+    end,
     location: getTagValue(event.tags, 'location'),
     geohash: getTagValue(event.tags, 'g'),
     hashtags: getTagValues(event.tags, 't'),

src/modules/activities/types/ticket.ts

@@ -44,6 +44,10 @@ export interface TicketPaymentStatus {
 /**
  * LNbits events extension event (database-backed ticketed event).
  * Corresponds to the Event model in the events extension.
+ *
+ * event_start_date / event_end_date are ISO 8601 — either date-only
+ * ("2026-05-19") or with a time ("2026-05-19T18:30"). Presence of "T"
+ * switches the publisher between NIP-52 kind 31922 and 31923.
  */
 export interface TicketedEvent {
   id: string

src/modules/activities/views/EventsPage.vue

@@ -33,7 +33,10 @@ function formatDate(dateStr: string | null | undefined) {
   if (!dateStr) return 'Date not available'
   const date = new Date(dateStr)
   if (isNaN(date.getTime())) return 'Invalid date'
-  return format(date, 'MMMM do, yyyy')
+  // Presence of "T" in the wire value marks a time-based event (NIP-52
+  // kind 31923 on our publisher). Show time only when one was set.
+  const hasTime = dateStr.includes('T')
+  return format(date, hasTime ? 'MMMM do, yyyy p' : 'MMMM do, yyyy')
 }
 
 function handlePurchaseClick(event: {