feat(inventory): 販賣機視覺優化、修復匯入日期缺失與倉庫刪除權限錯誤

database/migrations/tenant/2026_02_09_090204_update_inventories_unique_index_to_include_location.php

@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('inventories', function (Blueprint $table) {
+            // 不刪除舊索引（以免外鍵報錯），直接建立新的、更精確的唯一索引
+            // 這樣「商品+批號+貨道」的組合就會被視為唯一，達成多貨道支援
+            $table->unique(['warehouse_id', 'product_id', 'batch_number', 'location'], 'warehouse_product_batch_location_unique');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('inventories', function (Blueprint $table) {
+            $table->dropUnique('warehouse_product_batch_location_unique');
+        });
+    }
+};

database/migrations/tenant/2026_02_09_090508_force_remove_old_inventory_unique_index.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        // 最直接的做法：暫時關閉外鍵檢查，然後強制刪除報錯的索引
+        DB::statement('SET FOREIGN_KEY_CHECKS=0;');
+        
+        try {
+            // 直接下達 SQL 指令刪除索引
+            DB::statement('ALTER TABLE inventories DROP INDEX warehouse_product_batch_unique;');
+        } catch (\Exception $e) {
+            // 索引不存在則跳過
+        }
+
+        DB::statement('SET FOREIGN_KEY_CHECKS=1;');
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        DB::statement('SET FOREIGN_KEY_CHECKS=0;');
+        
+        DB::statement('ALTER TABLE inventories ADD UNIQUE INDEX warehouse_product_batch_unique (warehouse_id, product_id, batch_number);');
+
+        DB::statement('SET FOREIGN_KEY_CHECKS=1;');
+    }
+};