Server rail: the server with voice is shown on top

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ui/ServerRail.svelte

@@ -96,6 +96,8 @@
 </nav>
 
 <style>
+  /* The server you are talking on leads the list, wherever it sits in your own order */
+  .tile.voice { order: -1; }
   .rail {
     width: 68px; flex: none; background: var(--bg-0); display: flex; flex-direction: column;
     align-items: center; gap: 8px; padding: 12px 0; overflow-y: auto;

test/e2e/app.e2e.ts

@@ -881,6 +881,10 @@ try {
   await page.locator('.channel .name', { hasText: 'Root' }).dblclick();
   await until2('voice moved to the second server', () => !userState('alice-b')?.selfDeaf && !!userState('alice')?.selfDeaf);
   assert.equal(await page.locator('.rail .tile.voice').getAttribute('title').then(t => t?.startsWith('Second')), true);
+  // The server with voice leads the rail, although it was added last
+  const railTop = (title: string) => page.locator(`.rail .tile[title^="${title}"]`).boundingBox().then(b => b!.y);
+  assert.ok(await railTop('Second') < await railTop('Test Server'), 'voice server on top');
+  assert.match(await page.locator('.rail .tile').first().getAttribute('title') ?? '', /^Test Server/, 'the saved order is untouched');
   console.log('ok: voice follows the channel you join');
 
   // Messages on the server not on screen show as unread on its tile