feat: update _ member pubkey and show username only with gradient

Updates Grimoire member system to use the correct nprofile for _ and
displays member usernames without the @grimoire.rocks suffix.

Changes:
- Update _ member pubkey to 60dfe8bda... (from nprofile with relay hints)
- UserName component now shows just the username for Grimoire members
- Yellow-orange gradient styling applied to member usernames
- Updated nostr.json with new _ pubkey
- Fixed all tests to use correct pubkeys

Member usernames now display as:
- "_" with gradient (not "_@grimoire.rocks")
- "verbiricha" with gradient (not "verbiricha@grimoire.rocks")

public/.well-known/nostr.json

@@ -1,6 +1,6 @@
 {
   "names": {
-    "_": "ce3cd5ba3ae52cec4e4b267fb29f1d2a526a5f4b8e8475d8a603a63c8925295f",
+    "_": "60dfe8bda41b70736ae9a16385fa95c8d76792746c6f5e0a6249223e8779c667",
     "verbiricha": "7fa56f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751ac194"
   }
 }

src/components/nostr/UserName.tsx

@@ -24,7 +24,7 @@ export function UserName({ pubkey, isMention, className }: UserNameProps) {
   const grimoireUsername = getGrimoireUsername(pubkey);
   const displayName =
     isGrimoire && grimoireUsername
-      ? `${grimoireUsername}@grimoire.rocks`
+      ? grimoireUsername
       : getDisplayName(pubkey, profile);
 
   // Check if this is the logged-in user

src/lib/grimoire-members.test.ts

@@ -10,7 +10,7 @@ import {
 
 describe("Grimoire Members", () => {
   const underscorePubkey =
-    "ce3cd5ba3ae52cec4e4b267fb29f1d2a526a5f4b8e8475d8a603a63c8925295f";
+    "60dfe8bda41b70736ae9a16385fa95c8d76792746c6f5e0a6249223e8779c667";
   const verbirichaPubkey =
     "7fa56f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751ac194";
   const randomPubkey =

src/lib/grimoire-members.ts

@@ -24,7 +24,7 @@ export interface GrimoireMember {
 export const GRIMOIRE_MEMBERS: readonly GrimoireMember[] = [
   {
     username: "_",
-    pubkey: "ce3cd5ba3ae52cec4e4b267fb29f1d2a526a5f4b8e8475d8a603a63c8925295f",
+    pubkey: "60dfe8bda41b70736ae9a16385fa95c8d76792746c6f5e0a6249223e8779c667",
     nip05: "_@grimoire.rocks",
   },
   {

src/lib/nip05.test.ts

@@ -2,15 +2,17 @@ import { describe, it, expect } from "vitest";
 import { nip19 } from "nostr-tools";
 
 describe("NIP-19 Decoding for Grimoire Members", () => {
-  it("should decode npub for _ username", () => {
-    const npub =
-      "npub1eras6w483zu6ee8kewfdm97n72fdkfd4e8ujgch0d3jfycfflwhsytskz0";
-    const decoded = nip19.decode(npub);
+  it("should decode nprofile for _ username", () => {
+    const nprofile =
+      "nprofile1qyg8wumn8ghj7mn0wd68ytnddakj7qg4waehxw309aex2mrp0yhxgctdw4eju6t09uq3vamnwvaz7tmhda6zumn0wd68ytnsv9e8g7f0qyfhwumn8ghj7am0wsh82arcduhx7mn99uq35amnwvaz7tms09exzmtfvshxv6tpw34xze3wvdhk6tcpzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtcppemhxue69uhkummn9ekx7mp0qqsv37cd82nc3wdvunmvhykajlfl9ykmyk6un7fyvthkceyjvy5lhtcpnnnuw";
+    const decoded = nip19.decode(nprofile);
 
-    expect(decoded.type).toBe("npub");
-    expect(decoded.data).toBe(
-      "ce3cd5ba3ae52cec4e4b267fb29f1d2a526a5f4b8e8475d8a603a63c8925295f",
-    );
+    expect(decoded.type).toBe("nprofile");
+    if (decoded.type === "nprofile") {
+      expect(decoded.data.pubkey).toBe(
+        "60dfe8bda41b70736ae9a16385fa95c8d76792746c6f5e0a6249223e8779c667",
+      );
+    }
   });
 
   it("should decode nprofile for verbiricha username", () => {