타이틀, favicon 설정

frontend/src/components/AppHeader.vue

@@ -1,7 +1,8 @@
 <template>
   <header class="app-header">
     <div class="logo">
-      <h1>볼링 클럽 매니저</h1>
+      <img src="@/assets/LaneBowLogo.png" alt="LaneBow Logo" class="logo-img" />
+      <div class="app-title">볼링 클럽 매니저</div>
     </div>
     
     <div v-if="isLoggedIn" class="header-actions">
@@ -346,10 +347,24 @@ onBeforeUnmount(() => {
   z-index: 1000;
 }
 
-.logo h1 {
-  margin: 0;
+.logo {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+}
+.logo-img {
+  height: 70px;
+  width: auto;
+  margin-bottom: 0.3rem;
+}
+.app-title {
   font-size: 1.5rem;
   font-weight: 600;
+  color: white;
+  letter-spacing: 1px;
+  text-shadow: 0 2px 4px rgba(0,0,0,1);
+  margin-bottom: 0;
+  margin-top: -30px;
 }
 
 .header-actions {