nang cap san sang import

database/migrations/2026_05_01_000000_create_contracts_table.php

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+<?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::create('contracts', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('product_id')->constrained('products')->cascadeOnDelete();
+            $table->foreignId('customer_id')->constrained('customers')->cascadeOnDelete();
+            $table->string('type');
+            $table->date('start_date')->nullable();
+            $table->date('end_date')->nullable();
+            $table->string('status')->default('active');
+            $table->date('printed_at')->nullable();
+            $table->string('signed_status')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('contracts');
+    }
+};

database/migrations/2026_05_01_000001_add_contract_id_to_feedback_table.php

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+<?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('feedback', function (Blueprint $table) {
+            $table->foreignId('contract_id')->nullable()->after('customer_product_id')->constrained('contracts')->nullOnDelete();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('feedback', function (Blueprint $table) {
+            $table->dropForeign(['contract_id']);
+            $table->dropColumn('contract_id');
+        });
+    }
+};

database/migrations/2026_05_01_000002_create_handovers_table.php

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+<?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::create('handovers', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('product_id')->constrained('products')->cascadeOnDelete();
+            $table->foreignId('customer_id')->constrained('customers')->cascadeOnDelete();
+            $table->date('handover_date')->nullable();
+            $table->string('status')->default('chua_du_dieu_kien');
+            $table->text('remark')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('handovers');
+    }
+};

database/migrations/2026_05_01_000003_create_product_services_table.php

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+<?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::create('product_services', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('product_id')->constrained('products')->cascadeOnDelete();
+            $table->string('service_type');
+            $table->string('status')->default('active');
+            $table->date('actual_collection_date')->nullable();
+            $table->text('remark')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('product_services');
+    }
+};