Markdown renderer bug (vibe-kanban) (#940)

* Done! Fixed the markdown renderer bug with a simple one-line change plus typo fix. All type checks pass.

**Changes made:**
1. Added `disableParsingRawHTML: true` to prevent invalid ref attributes from raw HTML
2. Fixed typo: `text-baseleading-tight` → `text-base leading-tight`

* Cleanup script changes for task attempt 67d094ca-1a5f-4713-b595-26fce3aea3ef

frontend/src/components/ui/markdown-renderer.tsx

@@ -152,7 +152,7 @@ function MarkdownRenderer({
       },
       h2: {
         component: ({ children, ...props }: any) => (
-          <h2 {...props} className="text-baseleading-tight font-medium">
+          <h2 {...props} className="text-base leading-tight font-medium">
             {children}
           </h2>
         ),
@@ -244,7 +244,9 @@ function MarkdownRenderer({
         </div>
       )}
       <div className={className}>
-        <Markdown options={{ overrides }}>{content}</Markdown>
+        <Markdown options={{ overrides, disableParsingRawHTML: true }}>
+          {content}
+        </Markdown>
       </div>
     </div>
   );