feat: implement NIP-B0 web bookmarks renderer (kind 39701)

- Update icon from Globe to Bookmark in kind definitions
- Create Kind39701Renderer with title, URL (from d/u tag), and description
- Register renderer in kind registry
- Extract URL from d tag (identifier) or optional u tag
- Display with RichText formatting support

src/components/nostr/kinds/Kind39701Renderer.tsx

@@ -0,0 +1,50 @@
+import { BaseEventContainer, BaseEventProps } from "./BaseEventRenderer";
+import { RichText } from "../RichText";
+import { ExternalLink } from "lucide-react";
+
+/**
+ * Renderer for Kind 39701 - Web Bookmarks (NIP-B0)
+ * Displays bookmark title, URL, and description
+ */
+export function Kind39701Renderer({ event }: BaseEventProps) {
+  // Extract bookmark data from tags
+  const title = event.tags.find((t) => t[0] === "title")?.[1];
+  // URL comes from d tag (identifier) or optional u tag
+  const dTag = event.tags.find((t) => t[0] === "d")?.[1];
+  const uTag = event.tags.find((t) => t[0] === "u")?.[1];
+  const url = uTag || dTag;
+
+  return (
+    <BaseEventContainer event={event}>
+      <div className="flex flex-col gap-2">
+        {/* Title */}
+        {title && <h3 className="text-lg font-bold">{title}</h3>}
+
+        {/* URL with external link icon */}
+        {url && (
+          <a
+            href={url}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex items-center gap-2 text-accent hover:underline"
+          >
+            <ExternalLink className="size-4" />
+            <span className="text-sm break-all">{url}</span>
+          </a>
+        )}
+
+        {/* Description/Content as RichText */}
+        {event.content && (
+          <RichText event={event} className="text-sm text-muted-foreground" />
+        )}
+
+        {/* Fallback if no data */}
+        {!title && !url && (
+          <p className="text-sm text-muted-foreground italic">
+            (Empty bookmark)
+          </p>
+        )}
+      </div>
+    </BaseEventContainer>
+  );
+}

src/components/nostr/kinds/index.tsx

@@ -11,6 +11,7 @@ import { Kind9735Renderer } from "./Kind9735Renderer";
 import { Kind9802Renderer } from "./Kind9802Renderer";
 import { Kind10002Renderer } from "./Kind10002Renderer";
 import { Kind30023Renderer } from "./Kind30023Renderer";
+import { Kind39701Renderer } from "./Kind39701Renderer";
 import { NostrEvent } from "@/types/nostr";
 import { BaseEventContainer, type BaseEventProps } from "./BaseEventRenderer";
 
@@ -33,6 +34,7 @@ const kindRenderers: Record<number, React.ComponentType<BaseEventProps>> = {
   9802: Kind9802Renderer, // Highlight
   10002: Kind10002Renderer, // Relay List Metadata (NIP-65)
   30023: Kind30023Renderer, // Long-form Article
+  39701: Kind39701Renderer, // Web Bookmarks (NIP-B0)
 };
 
 /**

src/constants/kinds.ts

@@ -31,7 +31,6 @@ import {
   Wallet,
   Package,
   Map,
-  Globe,
   Highlighter,
   BarChart3,
   Timer,
@@ -902,7 +901,7 @@ export const EVENT_KINDS: Record<number | string, EventKind> = {
     name: "Web Bookmarks",
     description: "Web bookmarks",
     nip: "B0",
-    icon: Globe,
+    icon: Bookmark,
   },
 };