Unify layouts and create CatalogPage component

- MainNavigation: center tabs on page (absolute positioning)
- SubNavigation: align left instead of center
- Create CatalogPage universal component for list+map pages
- Migrate catalog pages (offers, suppliers, hubs) to CatalogPage
- Remove PageHeader from clientarea pages (redundant with navigation)
- Add topnav layout to supplier detail page

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/pages/catalog/suppliers/[id].vue

@@ -107,6 +107,10 @@ import {
   GetOffersDocument,
 } from '~/composables/graphql/public/exchange-generated'
 
+definePageMeta({
+  layout: 'topnav'
+})
+
 const route = useRoute()
 const localePath = useLocalePath()
 const { t } = useI18n()

app/pages/catalog/suppliers/index.vue

@@ -1,59 +1,34 @@
 <template>
-  <div class="flex flex-col flex-1 min-h-0">
-    <!-- Header -->
-    <div class="py-4">
-      <PageHeader :title="t('catalogSuppliersSection.header.title')" />
-    </div>
+  <CatalogPage
+    :items="items"
+    :loading="isLoading"
+    map-id="suppliers-map"
+    point-color="#3b82f6"
+    :selected-id="selectedSupplierId"
+    @select="onSelectSupplier"
+  >
+    <template #filters>
+      <CatalogFilters :filters="filters" v-model="selectedFilter" />
+    </template>
 
-    <!-- Loading state -->
-    <div v-if="isLoading" class="flex-1 flex items-center justify-center">
-      <Card padding="lg">
-        <Stack align="center" justify="center" gap="3">
-          <Spinner />
-          <Text tone="muted">{{ t('catalogLanding.states.loading') }}</Text>
-        </Stack>
-      </Card>
-    </div>
+    <template #card="{ item }">
+      <SupplierCard :supplier="item" />
+    </template>
 
-    <!-- ListMapLayout -->
-    <ListMapLayout
-      v-else
-      ref="listMapRef"
-      :items="items"
-      :selected-item-id="selectedSupplierId"
-      map-id="suppliers-map"
-      point-color="#3b82f6"
-      @select-item="onSelectSupplier"
-    >
-      <template #list>
-        <Stack gap="4">
-          <CatalogFilters :filters="filters" v-model="selectedFilter" />
+    <template #pagination>
+      <PaginationLoadMore
+        :shown="items.length"
+        :total="total"
+        :can-load-more="canLoadMore"
+        :loading="isLoadingMore"
+        @load-more="loadMore"
+      />
+    </template>
 
-          <Stack gap="3">
-            <SupplierCard
-              v-for="supplier in items"
-              :key="supplier.uuid || supplier.teamUuid"
-              :supplier="supplier"
-              :class="{ 'ring-2 ring-primary': (supplier.uuid || supplier.teamUuid) === selectedSupplierId }"
-              @click="onSelectSupplier(supplier.uuid || supplier.teamUuid)"
-            />
-          </Stack>
-
-          <PaginationLoadMore
-            :shown="items.length"
-            :total="total"
-            :can-load-more="canLoadMore"
-            :loading="isLoadingMore"
-            @load-more="loadMore"
-          />
-
-          <Stack v-if="total === 0" align="center" gap="2">
-            <Text tone="muted">{{ t('catalogSuppliersSection.empty.no_suppliers') }}</Text>
-          </Stack>
-        </Stack>
-      </template>
-    </ListMapLayout>
-  </div>
+    <template #empty>
+      <Text tone="muted">{{ t('catalogSuppliersSection.empty.no_suppliers') }}</Text>
+    </template>
+  </CatalogPage>
 </template>
 
 <script setup lang="ts">
@@ -77,10 +52,9 @@ const {
 
 // Selected supplier for map highlighting
 const selectedSupplierId = ref<string>()
-const listMapRef = ref<{ flyToItem: (uuid: string) => void } | null>(null)
 
-const onSelectSupplier = (uuid: string) => {
-  selectedSupplierId.value = uuid
+const onSelectSupplier = (supplier: any) => {
+  selectedSupplierId.value = supplier.uuid || supplier.teamUuid
 }
 
 await init()