feat: Enhance Nostr chat functionality with historical message loading

- Implement a new function to load historical messages for peers before subscribing to new messages, improving user experience by providing context.
- Add detailed console logging for both historical and live message events to aid in debugging and understanding message flow.
- Ensure consistent handling of conversation keys for both sent and received messages, enhancing message management.

src/composables/useNostrChat.ts

@@ -176,8 +176,24 @@ export function useNostrChat() {
 
     const myPubkey = currentUser.value.pubkey
     
-    // Subscribe to direct messages (kind 4)
+    // First, load historical messages
+    await loadHistoricalMessages(peerPubkey, myPubkey)
+    
+    // Then subscribe to new messages
     const relayConfigs = getRelays()
+    console.log('Subscribing to new messages for peer:', peerPubkey, 'with filters:', [
+      {
+        kinds: [4],
+        authors: [peerPubkey],
+        '#p': [myPubkey]
+      },
+      {
+        kinds: [4],
+        authors: [myPubkey],
+        '#p': [peerPubkey]
+      }
+    ])
+    
     const sub = pool.value.subscribeMany(
       relayConfigs.map(r => r.url),
       [
@@ -194,6 +210,7 @@ export function useNostrChat() {
       ],
       {
         onevent(event) {
+          console.log('Received live event:', event.id, 'author:', event.pubkey)
           handleIncomingMessage(event, peerPubkey)
         }
       }
@@ -202,6 +219,54 @@ export function useNostrChat() {
     return sub
   }
 
+  // Load historical messages for a peer
+  const loadHistoricalMessages = async (peerPubkey: string, myPubkey: string) => {
+    console.log('Loading historical messages for peer:', peerPubkey)
+    console.log('My pubkey:', myPubkey)
+    
+    const relayConfigs = getRelays()
+    console.log('Using relays:', relayConfigs.map(r => r.url))
+    
+    const filters = [
+      {
+        kinds: [4],
+        authors: [peerPubkey],
+        '#p': [myPubkey]
+      },
+      {
+        kinds: [4],
+        authors: [myPubkey],
+        '#p': [peerPubkey]
+      }
+    ]
+    
+    console.log('Historical query filters:', filters)
+    
+    const historicalSub = pool.value!.subscribeMany(
+      relayConfigs.map(r => r.url),
+      filters,
+      {
+        onevent(event) {
+          console.log('Received historical event:', {
+            id: event.id,
+            author: event.pubkey,
+            isSentByMe: event.pubkey === myPubkey,
+            contentLength: event.content.length
+          })
+          handleIncomingMessage(event, peerPubkey)
+        },
+        oneose() {
+          console.log('Historical query completed for peer:', peerPubkey)
+        }
+      }
+    )
+
+    // Wait a bit for historical messages to load
+    await new Promise(resolve => setTimeout(resolve, 3000))
+    historicalSub.close()
+    console.log('Historical query closed for peer:', peerPubkey)
+  }
+
   // Handle incoming message
   const handleIncomingMessage = async (event: any, peerPubkey: string) => {
     if (processedMessageIds.value.has(event.id)) {
@@ -210,14 +275,41 @@ export function useNostrChat() {
     
     processedMessageIds.value.add(event.id)
 
+    console.log('Handling incoming message:', {
+      eventId: event.id,
+      eventPubkey: event.pubkey,
+      myPubkey: currentUser.value!.pubkey,
+      peerPubkey,
+      isSentByMe: event.pubkey === currentUser.value!.pubkey
+    })
+
     try {
       // Decrypt the message
+      // For NIP-04 direct messages, always use peerPubkey as the second argument
+      // This is the public key of the other party in the conversation
+      const isSentByMe = event.pubkey === currentUser.value!.pubkey
+      
+      console.log('Decrypting message:', {
+        eventId: event.id,
+        isSentByMe,
+        eventPubkey: event.pubkey,
+        myPubkey: currentUser.value!.pubkey,
+        peerPubkey,
+        contentLength: event.content.length
+      })
+      
       const decryptedContent = await nip04.decrypt(
         currentUser.value!.prvkey,
-        event.pubkey,
+        peerPubkey, // Always use peerPubkey for shared secret derivation
         event.content
       )
       
+      console.log('Successfully decrypted message:', {
+        eventId: event.id,
+        contentLength: decryptedContent.length,
+        contentPreview: decryptedContent.substring(0, 50) + '...'
+      })
+
       const message: ChatMessage = {
         id: event.id,
         content: decryptedContent,
@@ -227,9 +319,10 @@ export function useNostrChat() {
       }
 
       // Add message to the appropriate conversation
-      const conversationKey = event.pubkey === currentUser.value!.pubkey 
-        ? peerPubkey 
-        : event.pubkey
+      // Always use peerPubkey as the conversation key for both sent and received messages
+      const conversationKey = peerPubkey
+
+      console.log('Storing message with conversation key:', conversationKey)
 
       if (!messages.value.has(conversationKey)) {
         messages.value.set(conversationKey, [])
@@ -240,6 +333,13 @@ export function useNostrChat() {
       // Sort messages by timestamp
       messages.value.get(conversationKey)!.sort((a, b) => a.created_at - b.created_at)
       
+      console.log('Messages for conversation:', messages.value.get(conversationKey)?.map(m => ({
+        id: m.id,
+        sent: m.sent,
+        content: m.content.substring(0, 30) + '...',
+        timestamp: m.created_at
+      })))
+      
     } catch (error) {
       console.error('Failed to decrypt message:', error)
     }