feat: add rich text rendering for live chat messages (kind 1311)

- Created LiveChatMessageRenderer component for NIP-53 live chat messages
- Displays messages with RichText component for full formatting support
- Links to parent live activity event (kind 30311) with clickable header
- Shows activity title or fallback to "Live chat with [host]"
- Registered kind 1311 in renderer registry
- Exported both human-readable name (LiveChatMessageRenderer) and kind alias (Kind1311Renderer)

src/components/nostr/kinds/LiveChatMessageRenderer.tsx

@@ -0,0 +1,87 @@
+import { useMemo } from "react";
+import { RichText } from "../RichText";
+import { BaseEventContainer, type BaseEventProps } from "./BaseEventRenderer";
+import { useNostrEvent } from "@/hooks/useNostrEvent";
+import { parseReplaceableAddress } from "applesauce-core/helpers/pointers";
+import { getDisplayName } from "@/lib/nostr-utils";
+import { useProfile } from "@/hooks/useProfile";
+import { Video } from "lucide-react";
+import { useGrimoire } from "@/core/state";
+
+/**
+ * Renderer for Kind 1311 - Live Chat Message (NIP-53)
+ * Displays live chat messages from live streaming events with rich text formatting
+ * and a link to the original live activity
+ */
+export function LiveChatMessageRenderer({ event, depth = 0 }: BaseEventProps) {
+  const { addWindow } = useGrimoire();
+
+  // Get the 'a' tag pointing to the live activity (kind 30311)
+  const aTag = event.tags.find((tag) => tag[0] === "a");
+  const activityAddress = aTag?.[1]; // Format: kind:pubkey:d-tag
+
+  // Parse the address pointer
+  const addressPointer = useMemo(
+    () => (activityAddress ? parseReplaceableAddress(activityAddress) : null),
+    [activityAddress],
+  );
+
+  // Fetch the live activity event
+  const liveActivity = useNostrEvent(
+    addressPointer
+      ? {
+          kind: addressPointer.kind,
+          pubkey: addressPointer.pubkey,
+          identifier: addressPointer.identifier || "",
+          relays: [],
+        }
+      : undefined,
+  );
+
+  // Get host profile for display name
+  const hostProfile = useProfile(addressPointer?.pubkey);
+  const hostName = hostProfile
+    ? getDisplayName(addressPointer!.pubkey, hostProfile)
+    : addressPointer?.pubkey.slice(0, 8);
+
+  // Get live activity title from tags
+  const activityTitle = liveActivity?.tags.find((t) => t[0] === "title")?.[1];
+
+  const handleActivityClick = () => {
+    if (!addressPointer) return;
+    addWindow(
+      "open",
+      {
+        pointer: {
+          kind: addressPointer.kind,
+          pubkey: addressPointer.pubkey,
+          identifier: addressPointer.identifier || "",
+        },
+      },
+      activityTitle || "Live Activity",
+    );
+  };
+
+  return (
+    <BaseEventContainer event={event}>
+      {/* Link to original live activity */}
+      {addressPointer && (
+        <button
+          onClick={handleActivityClick}
+          className="flex items-center gap-1.5 text-xs text-muted-foreground hover:text-foreground transition-colors mb-1 cursor-crosshair"
+        >
+          <Video className="size-3" />
+          <span className="truncate">
+            {activityTitle || `Live chat with ${hostName}`}
+          </span>
+        </button>
+      )}
+
+      {/* Message content with rich text */}
+      <RichText event={event} className="text-sm" depth={depth} />
+    </BaseEventContainer>
+  );
+}
+
+// Export with human-readable name as primary
+export { LiveChatMessageRenderer as Kind1311Renderer };

src/components/nostr/kinds/index.tsx

@@ -7,6 +7,7 @@ import { Kind3DetailView } from "./ContactListRenderer";
 import { RepostRenderer } from "./RepostRenderer";
 import { Kind7Renderer } from "./ReactionRenderer";
 import { Kind9Renderer } from "./ChatMessageRenderer";
+import { LiveChatMessageRenderer } from "./LiveChatMessageRenderer";
 import { Kind20Renderer } from "./PictureRenderer";
 import { Kind21Renderer } from "./VideoRenderer";
 import { Kind22Renderer } from "./ShortVideoRenderer";
@@ -85,6 +86,7 @@ const kindRenderers: Record<number, React.ComponentType<BaseEventProps>> = {
   1063: Kind1063Renderer, // File Metadata (NIP-94)
   1111: Kind1111Renderer, // Post (NIP-22)
   1222: VoiceMessageRenderer, // Voice Message (NIP-A0)
+  1311: LiveChatMessageRenderer, // Live Chat Message (NIP-53)
   1244: VoiceMessageRenderer, // Voice Message Reply (NIP-A0)
   1337: Kind1337Renderer, // Code Snippet (NIP-C0)
   1617: PatchRenderer, // Patch (NIP-34)
@@ -227,6 +229,10 @@ export {
 } from "./RepostRenderer";
 export { Kind7Renderer } from "./ReactionRenderer";
 export { Kind9Renderer } from "./ChatMessageRenderer";
+export {
+  LiveChatMessageRenderer,
+  Kind1311Renderer,
+} from "./LiveChatMessageRenderer";
 export { Kind20Renderer } from "./PictureRenderer";
 export { Kind21Renderer } from "./VideoRenderer";
 export { Kind22Renderer } from "./ShortVideoRenderer";