chore: move site nav tabs above site header and update changelog

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/sites/[id]/page.tsx

@@ -439,6 +439,8 @@ export default function SiteDashboardPage() {
       transition={{ duration: 0.2 }}
       className="w-full max-w-6xl mx-auto px-4 sm:px-6 py-8"
     >
+      <SiteNav siteId={siteId} />
+
       <div className="mb-8">
         <div className="flex items-center justify-between mb-4">
           <div className="flex items-center gap-4">
@@ -521,8 +523,6 @@ export default function SiteDashboardPage() {
         </div>
       </div>
 
-      <SiteNav siteId={siteId} />
-
       {/* Dimension Filters */}
       <div className="flex items-center gap-2 flex-wrap mb-2">
         <AddFilterDropdown onAdd={handleAddFilter} suggestions={filterSuggestions} onFetchSuggestions={handleFetchSuggestions} />