refactor(layout): remove duplicate language toggle and center date

Author: ppippi-dev

src/layouts/BlogPost.astro

@@ -120,6 +120,7 @@ const imageUrl = heroImage ? new URL(heroImage, Astro.site).href : new URL(Fallb
 			.post-meta {
 				display: flex;
 				align-items: center;
+				justify-content: center;
 				gap: 16px;
 				font-size: 0.9rem;
 				color: #999;
@@ -131,21 +132,6 @@ const imageUrl = heroImage ? new URL(heroImage, Astro.site).href : new URL(Fallb
 			.last-updated {
 				font-style: italic;
 			}
-			.lang-toggle {
-				margin-left: auto;
-				color: #555;
-				font-size: 0.85rem;
-				font-weight: 500;
-				text-decoration: none;
-				padding: 4px 12px;
-				border: 1px solid #ddd;
-				border-radius: 4px;
-				transition: all 0.2s;
-			}
-			.lang-toggle:hover {
-				border-color: #111;
-				color: #111;
-			}
 			.post-content {
 				color: rgb(51, 51, 51);
 				font-size: 1rem;
@@ -312,9 +298,6 @@ const imageUrl = heroImage ? new URL(heroImage, Astro.site).href : new URL(Fallb
 								(수정: <FormattedDate date={updatedDate} />)
 							</span>
 						)}
-						{slug && (
-							<a href={`/en/blog/${slug}/`} class="lang-toggle">EN</a>
-						)}
 					</div>
 				</header>
 				<div class="post-content">

src/layouts/BlogPostEn.astro

@@ -120,6 +120,7 @@ const imageUrl = heroImage ? new URL(heroImage, Astro.site).href : new URL(Fallb
 			.post-meta {
 				display: flex;
 				align-items: center;
+				justify-content: center;
 				gap: 16px;
 				font-size: 0.9rem;
 				color: #999;
@@ -131,21 +132,6 @@ const imageUrl = heroImage ? new URL(heroImage, Astro.site).href : new URL(Fallb
 			.last-updated {
 				font-style: italic;
 			}
-			.lang-toggle {
-				margin-left: auto;
-				color: #555;
-				font-size: 0.85rem;
-				font-weight: 500;
-				text-decoration: none;
-				padding: 4px 12px;
-				border: 1px solid #ddd;
-				border-radius: 4px;
-				transition: all 0.2s;
-			}
-			.lang-toggle:hover {
-				border-color: #111;
-				color: #111;
-			}
 			.post-content {
 				color: rgb(51, 51, 51);
 				font-size: 1rem;
@@ -320,9 +306,6 @@ const imageUrl = heroImage ? new URL(heroImage, Astro.site).href : new URL(Fallb
 								(Updated: <FormattedDate date={updatedDate} />)
 							</span>
 						)}
-						{slug && (
-							<a href={`/blog/${slug}/`} class="lang-toggle">KO</a>
-						)}
 					</div>
 				</header>
 				<div class="post-content">