added firebase & changed main tab color, uyear stand out

src/App.svelte

@@ -5,9 +5,10 @@
   import TimelineView from './lib/timeline/TimelineView.svelte';
 
   let screen = $state('worldmap');
+  let inDetail = $state(false);
 </script>
 
-<Layout {screen} onNavigate={(s) => (screen = s)}>
+<Layout {screen} onNavigate={(s) => (screen = s)} hideTopBar={inDetail}>
   {#if screen === 'worldmap'}
     <div class="worldmap-page">
       <div class="map-area">
@@ -16,7 +17,7 @@
       <StatsPanel />
     </div>
   {:else}
-    <TimelineView />
+    <TimelineView onDetailChange={(v) => (inDetail = v)} />
   {/if}
 </Layout>