[FEAT] 優化部署流程：加入 RoleSeeder 與 AdminUserSeeder，並實作權限系統基礎架構與多租戶隔離機制

tests/Feature/TenantIsolationTest.php

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+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Machine\Machine;
+use App\Models\System\Company;
+use App\Models\System\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class TenantIsolationTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_tenant_can_only_see_their_own_machines()
+    {
+        // 建立兩家公司
+        $companyA = Company::create(['name' => 'Company A', 'code' => 'COA']);
+        $companyB = Company::create(['name' => 'Company B', 'code' => 'COB']);
+
+        // 建立各自的機台
+        Machine::create(['name' => 'Machine A', 'company_id' => $companyA->id]);
+        Machine::create(['name' => 'Machine B', 'company_id' => $companyB->id]);
+
+        // 建立租戶 A 的使用者並登入
+        $userA = User::factory()->create(['company_id' => $companyA->id]);
+        $this->actingAs($userA);
+
+        // 驗證 Eloquent 查詢是否被過濾
+        $machines = Machine::all();
+        
+        $this->assertCount(1, $machines);
+        $this->assertEquals('Machine A', $machines->first()->name);
+        $this->assertFalse($machines->contains('name', 'Machine B'));
+    }
+
+    public function test_system_admin_can_see_all_machines()
+    {
+        // 建立兩家公司
+        $companyA = Company::create(['name' => 'Company A', 'code' => 'COA']);
+        $companyB = Company::create(['name' => 'Company B', 'code' => 'COB']);
+
+        // 建立各自的機台
+        Machine::create(['name' => 'Machine A', 'company_id' => $companyA->id]);
+        Machine::create(['name' => 'Machine B', 'company_id' => $companyB->id]);
+
+        // 建立系統管理員 (company_id = null) 並登入
+        $admin = User::factory()->create(['company_id' => null]);
+        $this->actingAs($admin);
+
+        // 驗證 Eloquent 查詢未被過濾
+        $machines = Machine::all();
+        
+        $this->assertCount(2, $machines);
+    }
+
+    public function test_creating_machine_automatically_sets_company_id_for_tenant()
+    {
+        $companyA = Company::create(['name' => 'Company A', 'code' => 'COA']);
+        $userA = User::factory()->create(['company_id' => $companyA->id]);
+        $this->actingAs($userA);
+
+        // 建立新機台（不指定 company_id）
+        $machine = Machine::create(['name' => 'New Machine']);
+
+        $this->assertEquals($companyA->id, $machine->company_id);
+    }
+}