refactor: 清理MES端本地product_type冗余代码，对齐WMS主数据架构

1.  移除MES端本地product_type实体、schema及相关CRUD代码，改为通过WMS内部API代理获取物料主数据
2.  更新物料管理粒度逻辑，新增"其他"类型(3)支持，同步更新入库校验规则
3.  修复前端物料选择、库存筛选等页面的类型判断逻辑，统一使用manage_mode区分管理类型
4.  清理静态资源文件冗余的样式代码，调整前端页面展示逻辑
5.  更新帮助文档，修正物料类型的说明描述

bj_power_mes/ent/migrate/schema.go

@@ -623,36 +623,6 @@ var (
 			},
 		},
 	}
-	// ProductTypeColumns holds the columns for the "product_type" table.
-	ProductTypeColumns = []*schema.Column{
-		{Name: "id", Type: field.TypeInt, Increment: true},
-		{Name: "name", Type: field.TypeString, Size: 50},
-		{Name: "code", Type: field.TypeString, Size: 20},
-		{Name: "category", Type: field.TypeString, Size: 30, Default: ""},
-		{Name: "spec", Type: field.TypeString, Size: 128, Default: ""},
-		{Name: "unit", Type: field.TypeString, Size: 32, Default: ""},
-		{Name: "is_active", Type: field.TypeBool, Default: true},
-		{Name: "created_at", Type: field.TypeTime},
-		{Name: "updated_at", Type: field.TypeTime, Nullable: true},
-	}
-	// ProductTypeTable holds the schema information for the "product_type" table.
-	ProductTypeTable = &schema.Table{
-		Name:       "product_type",
-		Columns:    ProductTypeColumns,
-		PrimaryKey: []*schema.Column{ProductTypeColumns[0]},
-		Indexes: []*schema.Index{
-			{
-				Name:    "producttype_code",
-				Unique:  false,
-				Columns: []*schema.Column{ProductTypeColumns[2]},
-			},
-			{
-				Name:    "producttype_is_active",
-				Unique:  false,
-				Columns: []*schema.Column{ProductTypeColumns[6]},
-			},
-		},
-	}
 	// RoleColumns holds the columns for the "role" table.
 	RoleColumns = []*schema.Column{
 		{Name: "id", Type: field.TypeInt, Increment: true},
@@ -1170,7 +1140,6 @@ var (
 		PlcSendLogTable,
 		ProcessFlowTable,
 		ProcessStepTable,
-		ProductTypeTable,
 		RoleTable,
 		SemiFlowTable,
 		StationTable,
@@ -1240,9 +1209,6 @@ func init() {
 	ProcessStepTable.Annotation = &entsql.Annotation{
 		Table: "process_step",
 	}
-	ProductTypeTable.Annotation = &entsql.Annotation{
-		Table: "product_type",
-	}
 	RoleTable.Annotation = &entsql.Annotation{
 		Table: "role",
 	}