refactor: improve type safety and error handling in scraper

scrape-blog.ts

@@ -47,8 +47,6 @@ async function fetchBlogPosts(): Promise<BlogPost[]> {
   const postLinks = [...document.querySelectorAll('div.posttitle a')] as HTMLAnchorElement[];
   const postUrls = postLinks.map(link => link.href);
 
-  const posts: BlogPost[] = [];
-  
   // Process posts with limited concurrency and delays
   const processPost = async (url: string): Promise<BlogPost | null> => {
     await setTimeout(SCRAPE_CONFIG.delayBetweenRequests);
@@ -74,7 +72,11 @@ async function fetchBlogPosts(): Promise<BlogPost[]> {
         url
       };
     } catch (error) {
-      console.error(`Failed to process ${url}:`, error);
+      if (error instanceof Error) {
+        console.error(`Failed to process ${url}: ${error.message}`);
+      } else {
+        console.error(`Failed to process ${url}:`, error);
+      }
       return null;
     }
   };
@@ -84,9 +86,11 @@ async function fetchBlogPosts(): Promise<BlogPost[]> {
     postUrls.slice(0, 10).map(processPost) // Limit to 10 posts for initial testing
   );
 
-  const posts = results
-    .filter(result => result.status === 'fulfilled' && result.value !== null)
-    .map(result => (result as PromiseFulfilledResult<BlogPost>).value);
+  const posts: BlogPost[] = results
+    .filter((result): result is PromiseFulfilledResult<BlogPost> => 
+      result.status === 'fulfilled' && result.value !== null
+    )
+    .map(result => result.value);
 
   console.log(`Successfully processed ${posts.length}/${postUrls.length} posts`);
   return posts;