refactor: 优化文章摘要生成逻辑并移除多余的阅读全文链接

src/routes/+page.server.ts

@@ -40,12 +40,23 @@ export const load: PageServerLoad = async ({ platform }) => {
 			const year = d.getFullYear();
 			
 			let excerpt = '';
-			const contentStr = post.content as string || '';
+			let contentStr = post.content as string || '';
+			
+			// Filter out Hugo shortcodes like {{< admonition abstract "标题" >}}
+			contentStr = contentStr.replace(/\{\{<[\s\S]*?>\}\}/g, '');
+			
 			const parts = contentStr.split('<!--more-->');
 			if (parts.length > 1) {
 				excerpt = parts[0].trim();
 			} else {
-				excerpt = contentStr.replace(/[#*\`>~\\[\\]\\(\\)\\-]/g, '').substring(0, 150) + (contentStr.length > 150 ? '...' : '');
+				// Strip basic markdown syntax for the automatic excerpt
+				let plainText = contentStr.replace(/[#*\`>~\\[\\]\\(\\)\\-]/g, '').trim();
+				excerpt = plainText.substring(0, 150).trim();
+			}
+			
+			// Append ... to indicate there is more to read
+			if (excerpt && !excerpt.endsWith('...')) {
+				excerpt += '...';
 			}
 			
 			// Do not send full content to the list view to save bandwidth

src/routes/+page.svelte

@@ -18,7 +18,7 @@
 							<time>{post.date}</time>
 						</div>
 						<h1 class="title">{post.title}</h1>
-						<p class="excerpt">{post.excerpt} | <span class="full-link">阅读全文</span></p>
+						<p class="excerpt">{post.excerpt}</p>
 					</div>
 				</article>
 			</a>