UI fixes: header height, map color, panel scroll

- MainNavigation: fixed min-height to prevent jumping on mode switch
- CatalogMap: default pointColor changed from green to orange (#f97316)
- CatalogPage: panel scroll on entire container, not inner
- SelectionPanel: sticky header and search, removed inner scroll

app/components/catalog/SelectionPanel.vue

@@ -1,15 +1,15 @@
 <template>
-  <div class="flex flex-col h-full gap-3">
-    <!-- Header -->
-    <div class="flex items-center justify-between flex-shrink-0">
+  <div class="flex flex-col gap-3">
+    <!-- Header (sticky at top) -->
+    <div class="flex items-center justify-between sticky top-0 bg-base-300/95 -mx-4 px-4 py-2 -mt-4 z-10">
       <h3 class="font-semibold text-lg">{{ title }}</h3>
       <button class="btn btn-ghost btn-sm btn-circle" @click="emit('close')">
         <Icon name="lucide:x" size="18" />
       </button>
     </div>
 
-    <!-- Search input -->
-    <div class="flex-shrink-0">
+    <!-- Search input (sticky below header) -->
+    <div class="sticky top-10 bg-base-300/95 -mx-4 px-4 pb-2 z-10">
       <input
         v-model="searchQuery"
         type="text"
@@ -19,7 +19,7 @@
     </div>
 
     <!-- List -->
-    <div class="flex-1 overflow-y-auto -mx-1 px-1">
+    <div class="-mx-1 px-1">
       <div v-if="loading" class="flex items-center justify-center py-8">
         <span class="loading loading-spinner loading-md" />
       </div>