Update article display to adjust line spacing

Modified the `Article.tsx` component to change `leading-normal` to `leading-tight` for paragraph elements, reducing vertical spacing between lines. Also, an image file `article_paragraphs.png` was added, though its purpose is unclear from the diff alone.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 887925db-3598-4f1b-ade3-3c14f6e73e74
Replit-Commit-Checkpoint-Type: full_checkpoint

client/src/pages/Article.tsx

@@ -207,7 +207,7 @@ export default function Article() {
                 );
               }
               return (
-                <p key={index} className="mb-3 whitespace-pre-wrap leading-normal">
+                <p key={index} className="mb-3 whitespace-pre-wrap leading-tight">
                   {part.content}
                 </p>
               );