feat: add ChatOverview component with conversation list and search functionality

app/chat/page.tsx

@@ -0,0 +1,15 @@
+import { Metadata } from 'next';
+import ChatOverview from '@/components/chat/ChatOverview';
+
+export const metadata: Metadata = {
+  title: 'Chats | Lumina',
+  description: 'Your conversations on Nostr',
+};
+
+export default function ChatPage() {
+  return (
+    <div className="container mx-auto px-4 py-4">
+      <ChatOverview />
+    </div>
+  );
+}

components/chat/ChatOverview.tsx

@@ -0,0 +1,164 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { useNostrEvents, dateToUnix } from 'nostr-react';
+import { useRouter } from 'next/navigation';
+import { Search } from 'lucide-react';
+import { Input } from '@/components/ui/input';
+import { Button } from '@/components/ui/button';
+import { Avatar, AvatarFallback, AvatarImage } from '@/components/ui/avatar';
+import { ScrollArea } from '@/components/ui/scroll-area';
+
+export default function ChatOverview() {
+  const router = useRouter();
+  const [searchQuery, setSearchQuery] = useState('');
+  const [conversations, setConversations] = useState<any[]>([]);
+  const now = new Date();
+
+  // In a real implementation, this would fetch direct messages (kind 4)
+  // from various relays and process them to show conversations
+  const { events } = useNostrEvents({
+    filter: {
+      kinds: [4], // Kind 4 is direct messages in Nostr
+      since: dateToUnix(new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000)), // Last 30 days
+    },
+  });
+
+  // For demo purposes, let's add some dummy conversations
+  useEffect(() => {
+    // These would be actual pubkeys in a real implementation
+    const dummyConversations = [
+      { 
+        id: '1',
+        pubkey: 'npub1abcdefghijklmnopqrstuvwxyz123456789abcdefghijklmnopqrst', 
+        name: 'Alice',
+        avatar: '',
+        lastMessage: 'Hey, how are you doing?',
+        timestamp: new Date(now.getTime() - 30 * 60 * 1000), // 30 minutes ago
+        unread: 2
+      },
+      { 
+        id: '2',
+        pubkey: 'npub2abcdefghijklmnopqrstuvwxyz123456789abcdefghijklmnopqrst', 
+        name: 'Bob',
+        avatar: '',
+        lastMessage: 'Did you see the new Nostr client everyone is talking about?',
+        timestamp: new Date(now.getTime() - 2 * 60 * 60 * 1000), // 2 hours ago
+        unread: 0
+      },
+      { 
+        id: '3',
+        pubkey: 'npub3abcdefghijklmnopqrstuvwxyz123456789abcdefghijklmnopqrst', 
+        name: 'Charlie',
+        avatar: '',
+        lastMessage: 'Thanks for sharing that article about Bitcoin!',
+        timestamp: new Date(now.getTime() - 1 * 24 * 60 * 60 * 1000), // 1 day ago
+        unread: 0
+      },
+      { 
+        id: '4',
+        pubkey: 'npub4abcdefghijklmnopqrstuvwxyz123456789abcdefghijklmnopqrst', 
+        name: 'Diana',
+        avatar: '',
+        lastMessage: 'Check out this cool zap feature I just discovered!',
+        timestamp: new Date(now.getTime() - 2 * 24 * 60 * 60 * 1000), // 2 days ago
+        unread: 1
+      },
+      { 
+        id: '5',
+        pubkey: 'npub5abcdefghijklmnopqrstuvwxyz123456789abcdefghijklmnopqrst', 
+        name: 'Evan',
+        avatar: '',
+        lastMessage: 'When are you planning to start your Nostr relay?',
+        timestamp: new Date(now.getTime() - 5 * 24 * 60 * 60 * 1000), // 5 days ago
+        unread: 0
+      },
+    ];
+    
+    setConversations(dummyConversations);
+  }, []);
+
+  const filteredConversations = conversations.filter(convo => 
+    convo.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
+    convo.lastMessage.toLowerCase().includes(searchQuery.toLowerCase())
+  );
+
+  const navigateToChat = (pubkey: string) => {
+    // Convert npub to hex format if needed
+    let hexPubkey = pubkey;
+    if (pubkey.startsWith('npub')) {
+      try {
+        // This would actually convert using nostr-tools in real implementation
+        // For demo, we'll just use the pubkey as is
+        hexPubkey = pubkey;
+      } catch (e) {
+        console.error('Failed to convert pubkey', e);
+      }
+    }
+    
+    router.push(`/chat/${hexPubkey}`);
+  };
+
+  return (
+    <div className="flex flex-col h-full">
+      <div className="mb-4">
+        <h1 className="text-2xl font-bold mb-4">Messages</h1>
+        <div className="relative">
+          <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-muted-foreground h-4 w-4" />
+          <Input
+            placeholder="Search conversations..."
+            className="pl-10"
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+          />
+        </div>
+      </div>
+      
+      <ScrollArea className="flex-1">
+        <div className="space-y-2">
+          {filteredConversations.length > 0 ? (
+            filteredConversations.map((convo) => (
+              <div 
+                key={convo.id}
+                className="flex items-center p-3 rounded-lg hover:bg-muted cursor-pointer"
+                onClick={() => navigateToChat(convo.pubkey)}
+              >
+                <Avatar className="h-12 w-12 mr-3">
+                  <AvatarImage src={convo.avatar} alt={convo.name} />
+                  <AvatarFallback>{convo.name.substring(0, 2).toUpperCase()}</AvatarFallback>
+                </Avatar>
+                
+                <div className="flex-1 min-w-0">
+                  <div className="flex justify-between items-center">
+                    <h3 className="font-medium truncate">{convo.name}</h3>
+                    <span className="text-xs text-muted-foreground ml-2 whitespace-nowrap">
+                        {new Date(convo.timestamp).toLocaleTimeString([], {
+                            hour: '2-digit',
+                            minute: '2-digit',
+                        })}
+                    </span>
+                  </div>
+                  <p className="text-sm text-muted-foreground truncate">{convo.lastMessage}</p>
+                </div>
+                
+                {convo.unread > 0 && (
+                  <div className="ml-3 bg-primary text-primary-foreground rounded-full w-5 h-5 flex items-center justify-center text-xs">
+                    {convo.unread}
+                  </div>
+                )}
+              </div>
+            ))
+          ) : (
+            <p className="text-center text-muted-foreground py-8">No conversations found</p>
+          )}
+        </div>
+      </ScrollArea>
+      
+      <div className="mt-4">
+        <Button className="w-full" onClick={() => {/* Would open new message dialog */}}>
+          New Message
+        </Button>
+      </div>
+    </div>
+  );
+}