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/MainNavigation.vue

@@ -1,5 +1,5 @@
 <template>
-  <header class="sticky top-0 z-40 bg-base-100 border-b border-base-300">
+  <header class="bg-base-100 border-b border-base-300">
     <div class="relative flex items-center h-16 px-4 lg:px-6">
       <!-- Left: Logo -->
       <div class="flex items-center">