feat: publication management with cover images, PDFs, and fruit images (story #04)

Full CRUD for publications; link fruits to publications; upload per-fruit
PDF descriptions and fruit images stored as BYTEA; fruit detail page shows
publication descriptions and images. ImageOverlayDrawer for cover thumbnail
full-size view.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/router/index.ts

@@ -3,6 +3,9 @@ import HelloWorld from '../views/HelloWorld.vue'
 import FruitList from '../views/FruitList.vue'
 import FruitCreate from '../views/FruitCreate.vue'
 import FruitDetail from '../views/FruitDetail.vue'
+import PublicationList from '../views/PublicationList.vue'
+import PublicationCreate from '../views/PublicationCreate.vue'
+import PublicationDetail from '../views/PublicationDetail.vue'
 
 const router = createRouter({
   history: createWebHistory(),
@@ -25,6 +28,20 @@ const router = createRouter({
       component: FruitDetail,
       props: true,
     },
+    {
+      path: '/publications',
+      component: PublicationList,
+    },
+    {
+      // /publications/new must come before /:id
+      path: '/publications/new',
+      component: PublicationCreate,
+    },
+    {
+      path: '/publications/:id',
+      component: PublicationDetail,
+      props: true,
+    },
   ],
 })