style: remove redundant dashboard heading

src/App.svelte

@@ -46,7 +46,6 @@
     </aside>
 
     <section class="content-area">
-      <div class="content-heading"><h1>{activeView}</h1><button class="secondary">⋮</button></div>
       <div class="dashboard-grid">
         <section class="panel preview-panel"><div class="panel-header"><span>STREAM PREVIEW</span><span class="panel-menu">⋮</span></div><div class="preview-stage"><div class="offline-mark">STREAM OFFLINE</div><div class="offline-subtitle">CONNECT TWITCH TO BEGIN</div></div><div class="panel-footer"><span class="micro">VIDEO PLAYER</span><span class="badge">OFFLINE</span></div></section>
         <section class="panel activity-panel"><div class="panel-header"><span>ACTIVITY FEED</span><span class="panel-menu">⋮</span></div><div class="panel-tabs"><button class="tab active">ALL ACTIVITY</button><button class="tab">MODERATION</button></div><div class="empty-state"><div class="empty-glyph">◌</div><strong>Nothing here yet</strong><span>Follows, subscriptions, raids, and server events will appear here.</span></div></section>

src/styles.css

@@ -260,20 +260,6 @@ label {
   min-width: 0;
   padding: 8px;
 }
-.content-heading {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  min-height: 24px;
-  margin-bottom: 4px;
-}
-.content-heading h1 {
-  margin: 0;
-  color: var(--ed-fg);
-  font: 600 13px var(--font-display);
-  letter-spacing: 0.16em;
-  text-transform: uppercase;
-}
 .dashboard-grid {
   display: grid;
   grid-template-columns: 1.3fr 1fr 1fr;