feat: Enhance debugging and authentication in Nostr chat

- Add detailed console logging in ChatComponent to track message sending attempts, selected peers, and authentication status.
- Integrate authentication checks in useNostrChat, ensuring users have valid Nostr keypairs before sending messages.
- Implement logic to generate and store new Nostr keys if none are found, improving user experience and key management.

src/components/nostr/ChatComponent.vue

@@ -537,6 +537,19 @@ const sendMessage = async () => {
   if (!selectedPeer.value || !messageInput.value.trim()) return
   
   try {
+    // Add debugging information
+    console.log('🔍 ChatComponent: Attempting to send message...')
+    console.log('🔍 ChatComponent: Selected peer:', selectedPeer.value)
+    console.log('🔍 ChatComponent: Message content:', messageInput.value)
+    
+    // Check authentication status
+    const keyStatus = nostrChat.getNostrKeyStatus()
+    console.log('🔍 ChatComponent: Nostr key status:', keyStatus)
+    
+    // Check if user is logged in
+    console.log('🔍 ChatComponent: Is logged in:', nostrChat.isLoggedIn.value)
+    console.log('🔍 ChatComponent: Current user:', nostrChat.currentUser.value)
+    
     await sendNostrMessage(selectedPeer.value.pubkey, messageInput.value)
     messageInput.value = ''