diff --git a/app/merchant/page.tsx b/app/merchant/page.tsx
index ba59180..0cfd0af 100644
--- a/app/merchant/page.tsx
+++ b/app/merchant/page.tsx
@@ -1,6 +1,7 @@
 'use client';
 
-import { useState, useEffect } from 'react';
+import { useState } from 'react';
+import Link from 'next/link';
 import { useWallet } from '../../hooks/useWallet';
 import { merchantLogin } from '../../lib/api';
 
@@ -33,9 +34,9 @@ export default function MerchantDashboard() {
             </div>
             <span className="text-sm font-bold text-white">OrbitStream</span>
           </div>
-          <a href="/" className="text-sm text-zinc-400 hover:text-white">
+          <Link href="/" className="text-sm text-zinc-400 hover:text-white">
             Home
-          </a>
+          </Link>
         </div>
       </nav>
 
diff --git a/app/page.tsx b/app/page.tsx
index 999ad5e..2f2159e 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -79,8 +79,8 @@ export default function Home() {
             <pre className="text-sm font-mono text-zinc-300">
               <span className="text-indigo-400">const</span> session = <span className="text-indigo-400">await</span> checkout.<span className="text-emerald-400">createSession</span>({'{\n'}
               {'  '}amount: <span className="text-amber-300">25.00</span>,{'\n'}
-              {'  '}asset: <span className="text-emerald-300">"USDC"</span>,{'\n'}
-              {'  '}successUrl: <span className="text-emerald-300">"https://example.com/success"</span>{'\n'}
+              {'  '}asset: <span className="text-emerald-300">{`"USDC"`}</span>,{'\n'}
+              {'  '}successUrl: <span className="text-emerald-300">{`"https://example.com/success"`}</span>{'\n'}
               {'}'});
             </pre>
           </div>
diff --git a/hooks/useWallet.ts b/hooks/useWallet.ts
index 3466ec5..96dd377 100644
--- a/hooks/useWallet.ts
+++ b/hooks/useWallet.ts
@@ -25,8 +25,9 @@ export function useWallet() {
           : 'Test SDF Network ; September 2015',
       });
       return result.signedTxXdr;
-    } catch (err: any) {
-      throw new Error(err?.message ?? 'Transaction signing failed');
+    } catch (err: unknown) {
+      const message = err instanceof Error ? err.message : 'Transaction signing failed';
+      throw new Error(message);
     }
   }, []);