chat support update

database/migrations/2025_12_17_053233_add_client_id_to_chat_messages.php

@@ -0,0 +1,25 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('chat_messages', function (Blueprint $table) {
+            $table->string('client_id')
+                  ->nullable()
+                  ->after('sender_type')
+                  ->index();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('chat_messages', function (Blueprint $table) {
+            $table->dropColumn('client_id');
+        });
+    }
+};