refactor: simplify header component

- Remove title and control buttons for cleaner interface
- Maintain status indicator functionality
- Improve visual hierarchy and spacing

frontend/src/components/Header.svelte

@@ -1,11 +1,9 @@
 <!-- components/Header.svelte -->
 <script>
 export let isOnline = true;
-export let title = "QRminator";
 </script>
 
 <header class="headerbar">
-    <h1 class="header-title">{title}</h1>
     <div class="header-status">
         {#if isOnline}
             <span>Online</span>
@@ -13,11 +11,6 @@ export let title = "QRminator";
             <span class="text-dim">Offline</span>
         {/if}
     </div>
-    <div class="header-controls">
-        <button class="control-button toggle">
-            <div class="toggle-indicator"></div>
-        </button>
-    </div>
 </header>
 
 <style>
@@ -31,9 +24,10 @@ export let title = "QRminator";
 }
 
 .header-title {
-    font-size: 1rem;
+    font-size: 16px;
     font-weight: bold;
     color: var(--text-primary);
+    line-height: 0;
 }
 
 .header-status {