feat(attachments): downloadable attachments in ProvenancePanel + PostInfoHeader

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

frontend/src/components/gallery/PostInfoHeader.vue

@@ -21,6 +21,11 @@
           v-if="info.data.post.url" :href="info.data.post.url"
           target="_blank" rel="noopener noreferrer"
         >↗ original post</a>
+        <a
+          v-for="at in (info.data.attachments || [])" :key="at.id"
+          class="fc-postinfo__attach"
+          :href="at.download_url" :download="at.original_filename"
+        >⬇ {{ at.original_filename }}</a>
       </div>
     </template>
     <span v-else-if="info && info.error" class="fc-postinfo__title">
@@ -90,4 +95,8 @@ function clear() {
   font-size: 13px; color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-postinfo__main a { color: rgb(var(--v-theme-accent)); text-decoration: none; }
+.fc-postinfo__attach {
+  font-size: 13px; color: rgb(var(--v-theme-accent));
+  text-decoration: none;
+}
 </style>

frontend/src/components/modal/ProvenancePanel.vue

@@ -44,6 +44,17 @@
         />
       </article>
     </template>
+
+    <div v-if="attachments.length" class="fc-prov__attach">
+      <h4 class="fc-prov__attach-title">Attachments</h4>
+      <a
+        v-for="at in attachments" :key="at.id"
+        class="fc-prov__attach-row"
+        :href="at.download_url" :download="at.original_filename"
+      >⬇ {{ at.original_filename }}
+        <span class="fc-prov__attach-size">({{ at.size_bytes }} B)</span>
+      </a>
+    </div>
   </section>
 </template>
 
@@ -77,6 +88,8 @@ const show = computed(() => {
   return Array.isArray(st.entries) && st.entries.length > 0
 })
 
+const attachments = computed(() => state.value?.attachments || [])
+
 function postDate(e) { return formatPostDate(e.post.date) }
 
 function openPost(postId) {
@@ -124,4 +137,14 @@ function openPost(postId) {
   color: rgb(var(--v-theme-on-surface-variant));
 }
 .fc-prov__desc :deep(a) { color: rgb(var(--v-theme-accent)); }
+.fc-prov__attach { padding: 0 0 12px; }
+.fc-prov__attach-title {
+  font-size: 13px; color: rgb(var(--v-theme-on-surface-variant));
+  margin: 8px 0 4px;
+}
+.fc-prov__attach-row {
+  display: block; font-size: 13px; text-decoration: none;
+  color: rgb(var(--v-theme-accent)); padding: 2px 0;
+}
+.fc-prov__attach-size { color: rgb(var(--v-theme-on-surface-variant)); }
 </style>

frontend/src/stores/provenance.js

@@ -16,8 +16,11 @@ export const useProvenanceStore = defineStore('provenance', () => {
     imageCache.value[id] = { loading: true, error: null, entries: null }
     try {
       const body = await api.get(`/api/provenance/image/${id}`)
-      imageCache.value[id] =
-        { loading: false, error: null, entries: body.provenance }
+      imageCache.value[id] = {
+        loading: false, error: null,
+        entries: body.provenance,
+        attachments: body.attachments || [],
+      }
     } catch (e) {
       imageCache.value[id] =
         { loading: false, error: e.message, entries: null }

frontend/test/provenance.spec.js

@@ -59,4 +59,18 @@ describe('provenance store', () => {
     expect(globalThis.fetch.mock.calls.length).toBe(1)
     expect(store.postInfo(3).data.artist.slug).toBe('a')
   })
+
+  it('loadForImage keeps attachments from the payload', async () => {
+    const store = useProvenanceStore()
+    stubFetch(() => ({
+      status: 200,
+      body: {
+        image_id: 1, provenance: [],
+        attachments: [{ id: 9, original_filename: 'p.zip', size_bytes: 5,
+          ext: '.zip', download_url: '/api/attachments/9/download' }]
+      }
+    }))
+    await store.loadForImage(1)
+    expect(store.imageProv(1).attachments[0].id).toBe(9)
+  })
 })