Hide empty testing batches in changelog

frontend/src/components/AboutModal.svelte

@@ -2,6 +2,12 @@
     import { createEventDispatcher } from 'svelte';
     import { VERSION, CHANGELOG } from '../lib/changelog';
 
+    const visibleEntries = CHANGELOG.filter((entry) =>
+        entry.version !== null ||
+        (entry.groups ?? [{ changes: entry.changes ?? [] }])
+            .some((group) => group.changes.some((change) => change.trim()))
+    );
+
     const dispatch = createEventDispatcher();
     function close() { dispatch('close'); }
 </script>
@@ -17,7 +23,7 @@
 
         <h4 class="about-heading">What's New</h4>
         <ul class="changelog">
-            {#each CHANGELOG as entry (entry.version)}
+            {#each visibleEntries as entry (entry.version)}
                 <li class="changelog-entry">
                     <div class="changelog-head">
                         <span class="changelog-ver">{entry.version === null ? 'In testing' : `v${entry.version}`}</span>

frontend/src/lib/changelog.js

@@ -10,9 +10,8 @@ export const VERSION = 50;
 
 // Newest first. In testing: { version: null, changes: [string, ...] }.
 // Release: { version, date: 'YYYY-MM-DD', groups: [{ title, changes: [...] }] }.
-// Historical flat changes arrays are also supported.
+// Historical flat changes arrays are also supported. Omit the testing entry when empty.
 export const CHANGELOG = [
-    { version: null, changes: ['Upcoming changes now appear together under In testing in About, ahead of numbered releases.'] },
     {
         version: 50,
         date: '2026-09-04',