Fix smooth scroll animation and map positioning

- Replace v-show with transform: translateY() for smooth header collapse animation
- Wrap MainNav + SubNav in fixed container with dynamic transform
- Remove sticky positioning from MainNavigation and SubNavigation
- Fix map to extend to screen edge (right-0, no rounded corners)
- Add dynamic padding-top to main for fixed header compensation

app/components/navigation/SubNavigation.vue

@@ -1,5 +1,5 @@
 <template>
-  <nav v-if="items.length > 0" class="sticky top-16 z-30 bg-base-100 border-b border-base-300">
+  <nav v-if="items.length > 0" class="bg-base-100 border-b border-base-300">
     <div class="flex items-center gap-1 py-2 px-4 lg:px-6 overflow-x-auto">
       <NuxtLink
         v-for="item in items"