feat: add kind 10051 (KeyPackage Relays) to relay list settings

Uncomment kind 10051 in kinds registry with NIP-EE attribution and add
it to the relay list editor so users can manage MLS KeyPackage relays.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/settings/RelayListsSettings.tsx

@@ -90,6 +90,15 @@ const RELAY_LIST_KINDS: RelayListKindUIConfig[] = [
     tagName: "relay",
     hasMarkers: false,
   },
+  {
+    kind: 10051,
+    name: "KeyPackage Relays",
+    description:
+      "Relays where you publish MLS KeyPackage events. Anyone who wants to start an encrypted group chat with you looks up this list.",
+    nip: "EE",
+    tagName: "relay",
+    hasMarkers: false,
+  },
 ];
 
 // --- Components ---
@@ -379,6 +388,10 @@ export function RelayListsSettings() {
     () => (pubkey ? eventStore.replaceable(10050, pubkey, "") : undefined),
     [pubkey],
   );
+  const event10051 = use$(
+    () => (pubkey ? eventStore.replaceable(10051, pubkey, "") : undefined),
+    [pubkey],
+  );
 
   const eventsMap: Record<number, NostrEvent | undefined> = useMemo(
     () => ({
@@ -387,8 +400,9 @@ export function RelayListsSettings() {
       10007: event10007,
       10012: event10012,
       10050: event10050,
+      10051: event10051,
     }),
-    [event10002, event10006, event10007, event10012, event10050],
+    [event10002, event10006, event10007, event10012, event10050, event10051],
   );
 
   // Local draft state: kind -> entries

src/constants/kinds.ts

@@ -837,13 +837,13 @@ export const EVENT_KINDS: Record<number | string, EventKind> = {
     nip: "51",
     icon: Mail,
   },
-  // 10051: {
-  //   kind: 10051,
-  //   name: "KeyPackage Relays",
-  //   description: "KeyPackage Relays List",
-  //   nip: "Marmot",
-  //   icon: Key,
-  // },
+  10051: {
+    kind: 10051,
+    name: "KeyPackage Relays",
+    description: "KeyPackage Relays List",
+    nip: "EE",
+    icon: Key,
+  },
   10040: {
     kind: 10040,
     name: "Trusted Providers",