Optimize market images with pict-rs thumbnails

Market components were serving full-resolution images regardless of
display size. Now uses pict-rs on-the-fly processing to serve WebP
thumbnails at appropriate sizes:

- ProductCard: 400px thumbnails (was full-res for 192px cards)
- CartItem: 128px thumbnails (was full-res for 64px display)
- CartSummary: 64px thumbnails (was full-res for 32px display)
- CheckoutPage: 128px thumbnails (was full-res for 64px display)
- StallView logo: 128px thumbnails (was full-res for 56px display)

Adds useImageOptimizer composable wrapping ImageUploadService.

Closes #8

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/modules/base/composables/useImageOptimizer.ts

@@ -0,0 +1,43 @@
+import { tryInjectService, SERVICE_TOKENS } from '@/core/di-container'
+import type { ImageUploadService } from '../services/ImageUploadService'
+
+/**
+ * Composable for generating optimized image URLs via pict-rs
+ * Handles both file aliases and full URLs
+ */
+export function useImageOptimizer() {
+  const imageService = tryInjectService<ImageUploadService>(SERVICE_TOKENS.IMAGE_UPLOAD_SERVICE)
+
+  /**
+   * Get a thumbnail URL (fast, lower quality - good for cards/lists)
+   */
+  const thumbnail = (url: string | undefined, size = 256): string => {
+    if (!url) return ''
+    if (!imageService) return url
+    return imageService.getThumbnailUrl(url, size)
+  }
+
+  /**
+   * Get a resized URL (Lanczos2 filter - better quality for larger displays)
+   */
+  const resized = (url: string | undefined, size = 800): string => {
+    if (!url) return ''
+    if (!imageService) return url
+    return imageService.getResizedUrl(url, size)
+  }
+
+  /**
+   * Get a blurred placeholder URL (for loading states)
+   */
+  const blurred = (url: string | undefined, blur = 5): string => {
+    if (!url) return ''
+    if (!imageService) return url
+    return imageService.getBlurredUrl(url, blur)
+  }
+
+  return {
+    thumbnail,
+    resized,
+    blurred
+  }
+}

src/modules/market/components/CartItem.vue

@@ -5,7 +5,7 @@
       <!-- Product Image -->
       <div class="flex-shrink-0">
         <img
-          :src="item.product.images?.[0] || '/placeholder-product.png'"
+          :src="thumbnail(item.product.images?.[0], 128) || '/placeholder-product.png'"
           :alt="item.product.name"
           class="w-16 h-16 object-cover rounded-md"
           loading="lazy"
@@ -104,7 +104,7 @@
         <!-- Product Image -->
         <div class="flex-shrink-0">
           <img
-            :src="item.product.images?.[0] || '/placeholder-product.png'"
+            :src="thumbnail(item.product.images?.[0], 128) || '/placeholder-product.png'"
             :alt="item.product.name"
             class="w-16 h-16 object-cover rounded-md"
             loading="lazy"
@@ -203,12 +203,14 @@ import { Button } from '@/components/ui/button'
 import { Badge } from '@/components/ui/badge'
 import { Minus, Plus, Trash2 } from 'lucide-vue-next'
 import type { CartItem as CartItemType } from '../types/market'
+import { useImageOptimizer } from '@/modules/base/composables/useImageOptimizer'
 
 interface Props {
   item: CartItemType
   stallId: string
 }
 
+const { thumbnail } = useImageOptimizer()
 const props = defineProps<Props>()
 
 const emit = defineEmits<{

src/modules/market/components/CartSummary.vue

@@ -17,7 +17,7 @@
       >
         <div class="flex items-center space-x-3">
           <img
-            :src="item.product.images?.[0] || '/placeholder-product.png'"
+            :src="thumbnail(item.product.images?.[0], 64) || '/placeholder-product.png'"
             :alt="item.product.name"
             class="w-8 h-8 object-cover rounded"
             loading="lazy"
@@ -144,6 +144,7 @@ import { ref, computed } from 'vue'
 import { useRouter } from 'vue-router'
 import { Button } from '@/components/ui/button'
 import { Shield } from 'lucide-vue-next'
+import { useImageOptimizer } from '@/modules/base/composables/useImageOptimizer'
 import type { ShippingZone } from '@/modules/market/stores/market'
 
 interface Props {
@@ -188,6 +189,7 @@ interface Props {
   }
 }
 
+const { thumbnail } = useImageOptimizer()
 const props = defineProps<Props>()
 
 const emit = defineEmits<{

src/modules/market/components/ProductCard.vue

@@ -158,6 +158,7 @@ import { Badge } from '@/components/ui/badge'
 import ProgressiveImage from '@/components/ui/image/ProgressiveImage.vue'
 import { ShoppingCart, Package, ChevronLeft, ChevronRight } from 'lucide-vue-next'
 import type { Product } from '@/modules/market/stores/market'
+import { useImageOptimizer } from '@/modules/base/composables/useImageOptimizer'
 
 interface Props {
   product: Product
@@ -171,6 +172,7 @@ const emit = defineEmits<{
   'view-stall': [stallId: string]
 }>()
 
+const { thumbnail } = useImageOptimizer()
 const imageError = ref(false)
 const currentImageIndex = ref(0)
 
@@ -188,7 +190,7 @@ const currentImage = computed(() => {
   if (productImages.value.length === 0) {
     return null
   }
-  return productImages.value[currentImageIndex.value]
+  return thumbnail(productImages.value[currentImageIndex.value], 400)
 })
 
 // Image cycling methods

src/modules/market/views/CheckoutPage.vue

@@ -56,7 +56,7 @@
                 <div class="w-16 h-16 bg-muted rounded-lg flex items-center justify-center">
                   <ProgressiveImage
                     v-if="item.product.images?.[0]"
-                    :src="item.product.images[0]"
+                    :src="thumbnail(item.product.images[0], 128)"
                     :alt="item.product.name"
                     container-class="w-full h-full"
                     image-class="w-full h-full object-cover rounded-lg"
@@ -291,11 +291,13 @@ import { Input } from '@/components/ui/input'
 import { Textarea } from '@/components/ui/textarea'
 import { Label } from '@/components/ui/label'
 import ProgressiveImage from '@/components/ui/image/ProgressiveImage.vue'
+import { useImageOptimizer } from '@/modules/base/composables/useImageOptimizer'
 import {
   Package,
   CheckCircle
 } from 'lucide-vue-next'
 
+const { thumbnail } = useImageOptimizer()
 const route = useRoute()
 const marketStore = useMarketStore()
 const authService = injectService(SERVICE_TOKENS.AUTH_SERVICE) as any

src/modules/market/views/StallView.vue

@@ -21,7 +21,7 @@
             <div class="flex-shrink-0">
               <div v-if="stall?.logo" class="w-12 h-12 sm:w-14 sm:h-14 rounded-xl bg-gradient-to-br from-primary/20 to-accent/20 border-2 border-primary/20 shadow-lg overflow-hidden ring-2 ring-primary/10">
                 <img
-                  :src="stall.logo"
+                  :src="thumbnail(stall.logo, 128)"
                   :alt="stall.name"
                   class="w-full h-full object-cover"
                   loading="lazy"
@@ -157,7 +157,9 @@ import CartButton from '../components/CartButton.vue'
 import CategoryFilterBar from '../components/CategoryFilterBar.vue'
 import type { Product, Stall } from '../types/market'
 import type { FuzzySearchOptions } from '@/composables/useFuzzySearch'
+import { useImageOptimizer } from '@/modules/base/composables/useImageOptimizer'
 
+const { thumbnail } = useImageOptimizer()
 const route = useRoute()
 const router = useRouter()
 const marketStore = useMarketStore()