feat(web-app): update KTB token info with Etherfuse Korean Treasury Bond data

Add proper description, summary, and buyInfo for KTB in discover page,
matching the same Etherfuse pattern used by USTRY, TESOURO, and CETES.

Made-with: Cursor

Author: aguilar1x

apps/web-app/public/assets/ktb.png

@@ -62,9 +62,14 @@ export const STOCK_INFO: Record<string, StockInfo> = {
   },
   KTB: {
     logo: "/assets/ktb.png",
-    name: "KTB Token",
-    description: "Real-world asset token available on Neko testnet",
+    name: "Korean Treasury Bond",
+    description:
+      "Tokenized Korean government bonds (KTBs) via Etherfuse and Shinhan Securities",
     summary:
-      "KTB is an RWA (real-world asset) token deployed on Stellar testnet for Neko Protocol liquidity and borrowing flows.",
+      "KTB is an Etherfuse Stablebond backed by short-term Korean Treasury Bonds — South Korean sovereign debt that earns yield on-chain. Issued in partnership with Shinhan Securities, it provides transparent exposure to one of Asia's most stable government bond markets. Available on Stellar, Solana, Base, Polygon, and Monad. Buy on Etherfuse at app.etherfuse.com or test at devnet.etherfuse.com.",
+    buyInfo: {
+      platform: "Etherfuse",
+      url: "https://app.etherfuse.com",
+    },
   },
 };

apps/web-app/src/features/stocks/utils/stockInfo.ts

@@ -76,7 +76,7 @@ const ASSETS_BY_NETWORK: Record<NetworkId, Record<string, AssetConfig>> = {
     },
     KTB: {
       code: "KTB",
-      name: "KTB Token",
+      name: "Korean Treasury Bond",
       contract: "CANIRPAKV2SUEH7O6LIOIQE5GCCIIS7EWFRRXBONIF2F2H6GEBDARAEM",
       decimals: 7,
       icon: "/assets/ktb.png",