feat(activities): banner image upload to img.ariege.io

Replace the plain "Image URL" text input on the event-creation form with
the shared <ImageUpload> component, single-file mode with :compress="true".
Files are resized + re-encoded to WebP client-side before hitting pict-rs
so phone-sized posters don't bloat the image server.

The stored `banner` is the canonical pict-rs original URL — the same
shape market uses — so existing display paths (thumbnail/resize URL
builders, NIP-52 "image" tag publishing) need no changes.

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

src/modules/activities/components/CreateEventDialog.vue

@@ -41,6 +41,8 @@ import {
 import { Calendar, Loader2, ChevronDown, MapPin } from 'lucide-vue-next'
 import { toastService } from '@/core/services/ToastService'
 import { injectService, SERVICE_TOKENS } from '@/core/di-container'
+import ImageUpload from '@/modules/base/components/ImageUpload.vue'
+import type { ImageUploadService, UploadedImage } from '@/modules/base/services/ImageUploadService'
 import type { TicketApiService } from '../services/TicketApiService'
 import type { CreateEventRequest } from '../types/ticket'
 import { ALL_CATEGORIES } from '../types/category'
@@ -66,7 +68,6 @@ const formSchema = toTypedSchema(z.object({
   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"),
   amount_tickets: z.number().min(0).max(100000).default(0),
   price_per_ticket: z.number().min(0).default(0),
@@ -82,13 +83,17 @@ const form = useForm({
     event_end_date: '',
     event_end_time: '',
     location: '',
-    banner: '',
     currency: 'sat',
     amount_tickets: 0,
     price_per_ticket: 0,
   }
 })
 
+interface BannerImage extends UploadedImage {
+  isPrimary: boolean
+}
+const bannerImages = ref<BannerImage[]>([])
+
 // 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
@@ -100,6 +105,7 @@ function foldDateTime(date: string, time: string): string {
 
 const paymentService = injectService(SERVICE_TOKENS.PAYMENT_SERVICE)
 const ticketApi = injectService(SERVICE_TOKENS.TICKET_API) as TicketApiService | null
+const imageService = injectService<ImageUploadService>(SERVICE_TOKENS.IMAGE_UPLOAD_SERVICE)
 
 const availableCurrencies = ref<string[]>(['sat'])
 const loadingCurrencies = ref(false)
@@ -173,7 +179,9 @@ const onSubmit = form.handleSubmit(async (formValues) => {
       )
     }
     if (formValues.location) eventData.location = formValues.location
-    if (formValues.banner) eventData.banner = formValues.banner
+    if (bannerImages.value.length > 0) {
+      eventData.banner = imageService.getImageUrl(bannerImages.value[0].alias)
+    }
     if (formValues.currency) eventData.currency = formValues.currency
     if (formValues.amount_tickets) eventData.amount_tickets = formValues.amount_tickets
     if (formValues.price_per_ticket) eventData.price_per_ticket = formValues.price_per_ticket
@@ -183,6 +191,7 @@ const onSubmit = form.handleSubmit(async (formValues) => {
     toastService.success('Event submitted!')
     resetForm()
     selectedCategories.value = []
+    bannerImages.value = []
     emit('update:open', false)
     emit('event-created')
   } catch (error) {
@@ -197,6 +206,7 @@ const handleOpenChange = (open: boolean) => {
   if (!open && !isLoading.value) {
     resetForm()
     selectedCategories.value = []
+    bannerImages.value = []
   }
   emit('update:open', open)
 }
@@ -296,16 +306,26 @@ const handleOpenChange = (open: boolean) => {
             </div>
           </div>
 
-          <!-- Image URL (optional, visible) -->
+          <!-- Banner image (optional). Client-side compressed to ~1MB
-          <FormField v-slot="{ componentField }" name="banner">
+               WebP before upload to keep pict-rs storage in check.
-            <FormItem>
+               Not a vee-validate field — managed via bannerImages ref. -->
-              <FormLabel>Image URL</FormLabel>
+          <div class="space-y-2">
-              <FormControl>
+            <p class="text-sm font-medium">Banner image</p>
-                <Input type="url" placeholder="https://example.com/image.jpg" v-bind="componentField" />
+            <p class="text-xs text-muted-foreground">
-              </FormControl>
+              One poster image. Auto-resized to 1920px max edge and re-encoded as WebP.
-              <FormMessage />
+            </p>
-            </FormItem>
+            <ImageUpload
-          </FormField>
+              v-model="bannerImages"
+              :multiple="false"
+              :max-files="1"
+              :max-size-mb="10"
+              :show-primary-button="false"
+              :disabled="isLoading"
+              :allow-camera="true"
+              :compress="true"
+              placeholder="Add a poster or banner"
+            />
+          </div>
 
           <!-- Tickets (optional, visible) -->
           <div class="grid grid-cols-3 gap-3">