Sync chat public key to users table and fix handle formatting

The chat public key is now also updated in the users table during key publishing for profile discovery. Additionally, sender handles in chat receive are now fully qualified with domain when necessary to ensure consistency in conversation and message storage.

src/app/api/chat/keys/route.ts

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { db } from '@/db';
-import { chatDeviceBundles, handleRegistry, remoteIdentityCache } from '@/db/schema';
+import { chatDeviceBundles, handleRegistry, remoteIdentityCache, users } from '@/db/schema';
 import { requireAuth } from '@/lib/auth';
 import { eq, and, gt } from 'drizzle-orm';
 
@@ -205,8 +205,7 @@ export async function POST(request: NextRequest) {
         );
       console.log('[Chat Keys POST] Updated existing key');
     } else {
-      // Insert new bundle
-      console.log('[Chat Keys POST] Inserting new bundle...');
+      console.log('[Chat Keys POST] Inserted new key');
       await db.insert(chatDeviceBundles).values({
         userId: user.id,
         did: user.did,
@@ -219,6 +218,11 @@ export async function POST(request: NextRequest) {
       console.log('[Chat Keys POST] Inserted new key');
     }
 
+    // Sync to users table too for profile discovery
+    await db.update(users)
+      .set({ chatPublicKey: publicKey })
+      .where(eq(users.id, user.id));
+
     console.log('[Chat Keys POST] Key published successfully for', user.handle);
     return NextResponse.json({ success: true });
   } catch (error: any) {

src/app/api/chat/receive/route.ts

@@ -37,6 +37,14 @@ export async function POST(request: NextRequest) {
             return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
         }
 
+        console.log(`[Chat Receive] From: ${senderHandle} (${senderNodeDomain}), To: ${recipientDid} [${encryptedContent.substring(0, 20)}...]`);
+
+        // Ensure remote handle is fully qualified
+        let finalSenderHandle = senderHandle;
+        if (!finalSenderHandle.includes('@') && senderNodeDomain) {
+            finalSenderHandle = `${senderHandle}@${senderNodeDomain}`;
+        }
+
         // 1. Find local recipient
         const recipientUser = await db.query.users.findFirst({
             where: eq(users.did, recipientDid)
@@ -51,14 +59,14 @@ export async function POST(request: NextRequest) {
         let conversation = await db.query.chatConversations.findFirst({
             where: and(
                 eq(chatConversations.participant1Id, recipientUser.id),
-                eq(chatConversations.participant2Handle, senderHandle)
+                eq(chatConversations.participant2Handle, finalSenderHandle)
             )
         });
 
         if (!conversation) {
             const [newConv] = await db.insert(chatConversations).values({
                 participant1Id: recipientUser.id,
-                participant2Handle: senderHandle,
+                participant2Handle: finalSenderHandle,
                 lastMessageAt: new Date(),
                 lastMessagePreview: '[Encrypted Message]'
             }).returning();
@@ -68,7 +76,7 @@ export async function POST(request: NextRequest) {
         // 3. Store Message
         await db.insert(chatMessages).values({
             conversationId: conversation.id,
-            senderHandle: senderHandle,
+            senderHandle: finalSenderHandle,
             senderDisplayName: senderDisplayName || senderHandle,
             senderAvatarUrl: senderAvatarUrl,
             senderNodeDomain: senderNodeDomain,