fix: set isConnected=true after opening restored bunker signer

- After page reload, signer is restored with isConnected=false
- When signing, requireConnection() would call connect() again without permissions
- Now we set isConnected=true after open() to prevent re-connection
- The bunker remembers permissions from initial connection
- This ensures signing works after page refresh

src/App.tsx

@@ -253,14 +253,15 @@ function App() {
             if (!nostrConnectAccount.signer.listening) {
               console.log('[bunker] Opening signer subscription...')
               await nostrConnectAccount.signer.open()
-              console.log('[bunker] ✅ Signer subscription opened, status:', {
-                listening: nostrConnectAccount.signer.listening,
-                isConnected: nostrConnectAccount.signer.isConnected
-              })
+              console.log('[bunker] ✅ Signer subscription opened')
             } else {
               console.log('[bunker] ✅ Signer already listening')
             }
             
+            // Mark as connected so requireConnection() doesn't call connect() again
+            // The bunker remembers the permissions from the initial connection
+            nostrConnectAccount.signer.isConnected = true
+            
             console.log('[bunker] Final signer status:', {
               listening: nostrConnectAccount.signer.listening,
               isConnected: nostrConnectAccount.signer.isConnected,