feat: Add peer notification subscriptions in Nostr chat

- Implement a new method to subscribe to peers for notifications without loading full message history.
- Enhance the ChatComponent to automatically subscribe to peers when the connection is established.
- Update the useNostrChat composable to include the new subscription method and handle notification events.
- Improve logging for subscription status and errors to aid in debugging.

src/components/nostr/ChatComponent.vue

@@ -450,6 +450,7 @@ const {
   connect,
   disconnect,
   subscribeToPeer,
+  subscribeToPeerForNotifications,
   sendMessage: sendNostrMessage,
   onMessageAdded,
   markMessagesAsRead,
@@ -502,6 +503,9 @@ const loadPeers = async () => {
       }))
       
       console.log(`Loaded ${peers.value.length} peers`)
+      
+      // Note: Subscriptions will be handled by the isConnected watcher
+      
     } catch (parseError) {
       console.error('JSON Parse Error for peers:', parseError)
       console.error('Response was:', responseText)
@@ -514,6 +518,38 @@ const loadPeers = async () => {
   }
 }
 
+// Subscribe to all peers for notifications (without loading full message history)
+const subscribeToAllPeers = async () => {
+  if (!peers.value.length) {
+    console.log('No peers to subscribe to')
+    return
+  }
+  
+  // Wait for connection to be established
+  if (!isConnected.value) {
+    console.log('Waiting for connection to be established before subscribing to peers')
+    // Wait a bit for connection to establish
+    await new Promise(resolve => setTimeout(resolve, 1000))
+    
+    if (!isConnected.value) {
+      console.warn('Still not connected, skipping peer subscriptions')
+      return
+    }
+  }
+  
+  console.log(`Subscribing to ${peers.value.length} peers for notifications`)
+  
+  for (const peer of peers.value) {
+    try {
+      // Subscribe to peer for notifications only (don't load full history)
+      await subscribeToPeerForNotifications(peer.pubkey)
+      console.log(`Successfully subscribed to notifications for peer: ${peer.pubkey}`)
+    } catch (error) {
+      console.warn(`Failed to subscribe to peer ${peer.pubkey}:`, error)
+    }
+  }
+}
+
 const refreshPeers = () => {
   loadPeers()
 }
@@ -619,6 +655,14 @@ onUnmounted(() => {
   disconnect()
 })
 
+// Watch for connection state changes and subscribe to peers when connected
+watch(isConnected, async (connected) => {
+  if (connected && peers.value.length > 0) {
+    console.log('Connection established, subscribing to peers for notifications')
+    await subscribeToAllPeers()
+  }
+})
+
 // Watch for new messages and scroll to bottom
 watch(currentMessages, (newMessages, oldMessages) => {
   console.log('Messages changed:', {