feat: 倉庫業務屬性、庫存成本追蹤與採購單功能更新

1. 倉庫管理：新增業務類型 (Owned/External/Customer) 與車牌資訊與司機欄位。
2. 庫存管理：實作成本追蹤 (unit_cost, total_value)，更新列表與撥補單顯示。
3. 採購單：新增採購日期 (order_date)，調整欄位名稱與順序。
4. 前端優化：更新相關 TS Type 定義與 UI 顯示。

database/migrations/tenant/2026_01_26_154522_add_type_and_vehicle_info_to_warehouses_table.php

@@ -0,0 +1,30 @@
+<?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('warehouses', function (Blueprint $table) {
+            $table->string('type')->default('standard')->after('description')->comment('倉庫業務類型 (enum)');
+            $table->string('license_plate')->nullable()->after('type')->comment('車牌號碼 (移動倉用)');
+            $table->string('driver_name')->nullable()->after('license_plate')->comment('司機姓名 (移動倉用)');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('warehouses', function (Blueprint $table) {
+            $table->dropColumn(['type', 'license_plate', 'driver_name']);
+        });
+    }
+};

database/migrations/tenant/2026_01_26_165104_add_cost_columns_to_inventories_and_transactions.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
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->decimal('unit_cost', 12, 4)->default(0)->after('quantity')->comment('單位成本');
+            $table->decimal('total_value', 12, 4)->default(0)->after('unit_cost')->comment('庫存總價值');
+        });
+
+        Schema::table('inventory_transactions', function (Blueprint $table) {
+            $table->decimal('unit_cost', 12, 4)->nullable()->after('quantity')->comment('異動當下的單位成本');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventory_transactions', function (Blueprint $table) {
+            $table->dropColumn('unit_cost');
+        });
+
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->dropColumn(['unit_cost', 'total_value']);
+        });
+    }
+};

database/migrations/tenant/2026_01_26_171156_add_order_date_to_purchase_orders_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
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('purchase_orders', function (Blueprint $table) {
+            $table->date('order_date')->nullable()->after('code');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('purchase_orders', function (Blueprint $table) {
+            $table->dropColumn('order_date');
+        });
+    }
+};