feat: parse and render nostr identifiers in highlight comments

- Detect and decode nostr: URIs (npub, nprofile, naddr, note, nevent) in comments
- Render profiles as clickable links with shortened pubkeys (@abc12345...)
- Render blog posts (kind:30023) as clickable article links
- Shorten other event identifiers to prevent layout breaks
- Add monospace styling for shortened nostr IDs
- Maintains DRY principles by extending existing CommentContent component

src/components/HighlightItem.tsx

@@ -29,16 +29,115 @@ const isImageUrl = (url: string): boolean => {
   }
 }
 
-// Component to render comment with links and inline images
+// Helper to render a nostr identifier
+const renderNostrId = (nostrUri: string, index: number): JSX.Element => {
+  try {
+    // Remove nostr: prefix
+    const identifier = nostrUri.replace(/^nostr:/, '')
+    const decoded = nip19.decode(identifier)
+    
+    switch (decoded.type) {
+      case 'npub': {
+        const pubkey = decoded.data
+        return (
+          <a
+            key={index}
+            href={`/p/${nip19.npubEncode(pubkey)}`}
+            className="highlight-comment-link"
+            onClick={(e) => e.stopPropagation()}
+          >
+            @{pubkey.slice(0, 8)}...
+          </a>
+        )
+      }
+      case 'nprofile': {
+        const { pubkey } = decoded.data
+        const npub = nip19.npubEncode(pubkey)
+        return (
+          <a
+            key={index}
+            href={`/p/${npub}`}
+            className="highlight-comment-link"
+            onClick={(e) => e.stopPropagation()}
+          >
+            @{pubkey.slice(0, 8)}...
+          </a>
+        )
+      }
+      case 'naddr': {
+        const { kind, pubkey, identifier } = decoded.data
+        // Check if it's a blog post (kind:30023)
+        if (kind === 30023) {
+          const naddr = nip19.naddrEncode({ kind, pubkey, identifier })
+          return (
+            <a
+              key={index}
+              href={`/a/${naddr}`}
+              className="highlight-comment-link"
+              onClick={(e) => e.stopPropagation()}
+            >
+              {identifier || 'Article'}
+            </a>
+          )
+        }
+        // For other kinds, show shortened identifier
+        return (
+          <span key={index} className="highlight-comment-nostr-id">
+            nostr:{identifier.slice(0, 12)}...
+          </span>
+        )
+      }
+      case 'note': {
+        const eventId = decoded.data
+        return (
+          <span key={index} className="highlight-comment-nostr-id">
+            note:{eventId.slice(0, 12)}...
+          </span>
+        )
+      }
+      case 'nevent': {
+        const { id } = decoded.data
+        return (
+          <span key={index} className="highlight-comment-nostr-id">
+            event:{id.slice(0, 12)}...
+          </span>
+        )
+      }
+      default:
+        // Fallback for unrecognized types
+        return (
+          <span key={index} className="highlight-comment-nostr-id">
+            {identifier.slice(0, 20)}...
+          </span>
+        )
+    }
+  } catch (error) {
+    // If decoding fails, show shortened identifier
+    const identifier = nostrUri.replace(/^nostr:/, '')
+    return (
+      <span key={index} className="highlight-comment-nostr-id">
+        {identifier.slice(0, 20)}...
+      </span>
+    )
+  }
+}
+
+// Component to render comment with links, inline images, and nostr identifiers
 const CommentContent: React.FC<{ text: string }> = ({ text }) => {
-  // URL regex pattern
-  const urlPattern = /(https?:\/\/[^\s]+)/g
+  // Pattern to match both http(s) URLs and nostr: URIs
+  const urlPattern = /((?:https?:\/\/|nostr:)[^\s]+)/g
   const parts = text.split(urlPattern)
   
   return (
     <>
       {parts.map((part, index) => {
-        if (part.match(urlPattern)) {
+        // Handle nostr: URIs
+        if (part.startsWith('nostr:')) {
+          return renderNostrId(part, index)
+        }
+        
+        // Handle http(s) URLs
+        if (part.match(/^https?:\/\//)) {
           if (isImageUrl(part)) {
             return (
               <img
@@ -64,6 +163,7 @@ const CommentContent: React.FC<{ text: string }> = ({ text }) => {
             )
           }
         }
+        
         return <span key={index}>{part}</span>
       })}
     </>

src/styles/layout/highlights.css

@@ -134,6 +134,7 @@
 .highlight-comment-text { flex: 1; min-width: 0; }
 .highlight-comment-link { color: var(--color-primary); text-decoration: underline; word-wrap: break-word; overflow-wrap: break-word; }
 .highlight-comment-link:hover { opacity: 0.8; }
+.highlight-comment-nostr-id { font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, 'DejaVu Sans Mono', monospace; font-size: 0.8em; color: var(--color-text-secondary); background: rgba(255, 255, 255, 0.05); padding: 0.125rem 0.375rem; border-radius: 3px; word-wrap: break-word; overflow-wrap: break-word; }
 .highlight-comment-image { display: block; max-width: 100%; height: auto; margin-top: 0.5rem; border-radius: 6px; border: 1px solid var(--color-border); }
 
 /* Level-colored comment icons */