新增：新人首次入住聊天室大礼包自动发放功能（6666金币 + 满场烟花 + 公屏欢迎）

database/migrations/2026_02_27_091852_add_has_received_new_gift_to_users_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->boolean('has_received_new_gift')->default(false)->after('id')->comment('是否已领取新人礼包');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('users', function (Blueprint $table) {
+            $table->dropColumn('has_received_new_gift');
+        });
+    }
+};