UI improvements: filters, map layout, search bar

- Add hubCountries query and country filter for hubs page
- Add getAvailableProducts query for offers (only products with active offers)
- Add sourceLatitude/sourceLongitude to orders GraphQL
- Fix ListMapLayout with position fixed for proper map height
- GlobalSearchBar: make fields wider, remove unit selector
- Remove status/isVerified filters from suppliers/offers (backend handles this)

app/components/layout/ListMapLayout.vue

@@ -1,23 +1,25 @@
 <template>
   <div class="flex flex-col flex-1 min-h-0">
     <!-- Desktop: side-by-side layout -->
-    <div class="hidden lg:flex flex-1 gap-4 min-h-0 overflow-hidden">
+    <div class="hidden lg:flex flex-1 gap-4 min-h-0">
       <!-- Left side: List (scrollable) -->
       <div class="w-2/5 overflow-y-auto pr-2">
         <slot name="list" />
       </div>
 
-      <!-- Right side: Map (sticky, full height from SubNav to bottom) -->
-      <div class="w-3/5 h-full rounded-lg overflow-hidden sticky top-0 self-start">
-        <ClientOnly>
-          <CatalogMap
-            ref="mapRef"
-            :map-id="mapId"
-            :items="itemsWithCoords"
-            :point-color="pointColor"
-            @select-item="onMapSelectItem"
-          />
-        </ClientOnly>
+      <!-- Right side: Map (fixed position, full height) -->
+      <div class="w-3/5 relative">
+        <div class="fixed top-28 right-6 w-[calc(60%-3rem)] h-[calc(100vh-8rem)] rounded-lg overflow-hidden">
+          <ClientOnly>
+            <CatalogMap
+              ref="mapRef"
+              :map-id="mapId"
+              :items="itemsWithCoords"
+              :point-color="pointColor"
+              @select-item="onMapSelectItem"
+            />
+          </ClientOnly>
+        </div>
       </div>
     </div>