Fix relay URL configuration to require explicit environment variable

- Remove auto-detection fallback for relay WebSocket URL
- Always require REACT_APP_OWN_RELAY_URL to be explicitly set
- Prevent panel from incorrectly connecting to ws://localhost:9002 instead of ws://localhost:9001
- Add clear error message when relay URL environment variable is missing
- Update .env.production with correct relay URL: ws://localhost:9001

Author: Maphikza

.env.production

@@ -15,7 +15,7 @@ PUBLIC_URL=
 # REACT_APP_ASSETS_BUCKET=https://your-domain.com
 
 # Nostr relay configuration for profile fetching
-# REACT_APP_OWN_RELAY_URL=  # ✅ Auto-detected from current domain
+REACT_APP_OWN_RELAY_URL=ws://localhost:9001
 # REACT_APP_NOSTR_RELAY_URLS=wss://your-relay1.com,wss://your-relay2.com
 
 # Development optimizations

src/config/config.ts

@@ -40,9 +40,13 @@ const config = {
   ],
 
   // User's own relay URL (primary relay for profile fetching)
-  // Auto-detect WebSocket URL based on current domain (relay runs on same host, different port or path)
-  ownRelayUrl: process.env.REACT_APP_OWN_RELAY_URL?.trim() || 
-    `${window.location.protocol === 'https:' ? 'wss:' : 'ws:'}//${window.location.host}`,
+  // Always require explicit relay URL configuration
+  ownRelayUrl: (() => {
+    if (!process.env.REACT_APP_OWN_RELAY_URL?.trim()) {
+      throw new Error('REACT_APP_OWN_RELAY_URL must be explicitly configured in environment variables');
+    }
+    return process.env.REACT_APP_OWN_RELAY_URL.trim();
+  })(),
 
   // Notification settings
   notifications: {