[FEAT] 實作公共事業費逾期提醒、租戶自訂通知設定及發送測試信功能

database/migrations/tenant/2026_03_05_141116_adjust_utility_fees_table.php

@@ -0,0 +1,39 @@
+<?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('utility_fees', function (Blueprint $table) {
+            // 1. 將費用日期改為可為空 (繳費日期)
+            $table->date('transaction_date')->nullable()->change();
+            
+            // 2. 新增繳費期限
+            $table->date('due_date')->nullable()->after('transaction_date')->comment('繳費期限');
+            
+            // 3. 新增繳費狀態
+            $table->enum('payment_status', ['pending', 'paid', 'overdue'])
+                  ->default('pending')
+                  ->after('amount')
+                  ->comment('繳費狀態');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('utility_fees', function (Blueprint $table) {
+            $table->date('transaction_date')->nullable(false)->change();
+            $table->dropColumn(['due_date', 'payment_status']);
+        });
+    }
+};