style: rename Content to Pages, Top Referrers to Referrers, consolidate changelog

Rename dashboard panel titles for clarity. Merge 0.13.1-alpha into
0.13.0-alpha and clean up changelog entries — remove developer-facing
notes, simplify language, and update panel names throughout.

components/dashboard/TopReferrers.tsx

@@ -86,7 +86,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
       <div className="bg-white dark:bg-neutral-900 border border-neutral-200 dark:border-neutral-800 rounded-2xl p-6 h-full flex flex-col">
         <div className="flex items-center justify-between mb-4">
           <h3 className="text-lg font-semibold text-neutral-900 dark:text-white">
-            Top Referrers
+            Referrers
           </h3>
         </div>
 
@@ -152,7 +152,7 @@ export default function TopReferrers({ referrers, collectReferrers = true, siteI
       <Modal
         isOpen={isModalOpen}
         onClose={() => setIsModalOpen(false)}
-        title="Top Referrers"
+        title="Referrers"
       >
         <div className="space-y-3 max-h-[60vh] overflow-y-auto pr-2">
           {isLoadingFull ? (