fix: sanitize relay URLs by removing trailing slashes

app/layout.tsx

@@ -29,9 +29,14 @@ export default function RootLayout({
     try {
       const customRelays = JSON.parse(localStorage.getItem("customRelays") || "[]");
       if (customRelays.length > 0) {
+        // Remove trailing slashes from any relay URLs
+        const sanitizedRelays = customRelays.map((relay: string) => 
+          relay.endsWith('/') ? relay.slice(0, -1) : relay
+        );
+        
         setRelayUrls(prevRelays => {
           // Combine default relays with custom relays, removing duplicates
-          const allRelays = [...prevRelays, ...customRelays];
+          const allRelays = [...prevRelays, ...sanitizedRelays];
           return Array.from(new Set(allRelays)); // Remove duplicates
         });
       }

components/AddRelaySheet.tsx

@@ -34,6 +34,11 @@ export function AddRelaySheet({ onRelayAdded }: AddRelaySheetProps) {
     if (!formattedUrl.startsWith("wss://")) {
       formattedUrl = `wss://${formattedUrl}`;
     }
+    
+    // Remove trailing slash if present
+    if (formattedUrl.endsWith('/')) {
+      formattedUrl = formattedUrl.slice(0, -1);
+    }
 
     // Check if relay already exists in connected relays
     const existingRelays = connectedRelays?.map(relay => relay.url) || [];