[FEAT] 重構機台狀態判定邏輯並優化全站多語系支援

1. 重構機台在線狀態判定機制：移除資料庫 status 欄位，改由 Model 根據心跳時間動態計算。
2. 修正儀表板 (Dashboard) 與機台管理頁面的多語系顯示問題，解決換行導致翻譯失效的 Bug。
3. 修正個人檔案頁面的麵包屑 (Breadcrumbs) 導航，補齊「個人設定」層級。
4. 更新 IoT API (B010, B600) 的認證機制與日誌處理邏輯。
5. 同步更新繁中、英文、日文語言檔，確保 UI 標籤一致性。

tests/Feature/MachineStatusTest.php

@@ -0,0 +1,86 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Machine\Machine;
+use App\Models\Machine\MachineLog;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class MachineStatusTest extends TestCase
+{
+    use RefreshDatabase;
+
+    /**
+     * Test machine is online with recent heartbeat and no errors.
+     */
+    public function test_machine_is_online_with_recent_heartbeat(): void
+    {
+        $machine = Machine::factory()->create([
+            'last_heartbeat_at' => now()->subSeconds(10),
+        ]);
+
+        $this->assertEquals('online', $machine->calculated_status);
+    }
+
+    /**
+     * Test machine is error with recent heartbeat but recent errors.
+     */
+    public function test_machine_is_error_with_recent_logs(): void
+    {
+        $machine = Machine::factory()->create([
+            'last_heartbeat_at' => now()->subSeconds(10),
+        ]);
+
+        // Add an error log 10 mins ago
+        MachineLog::create([
+            'machine_id' => $machine->id,
+            'level' => 'error',
+            'created_at' => now()->subMinutes(10),
+            'message' => 'Test error',
+        ]);
+
+        $this->assertEquals('error', $machine->calculated_status);
+    }
+
+    /**
+     * Test machine is offline with old heartbeat (30s+).
+     */
+    public function test_machine_is_offline_with_old_heartbeat(): void
+    {
+        $machine = Machine::factory()->create([
+            'last_heartbeat_at' => now()->subSeconds(35),
+        ]);
+
+        $this->assertEquals('offline', $machine->calculated_status);
+    }
+
+    /**
+     * Test machine scopes (online, offline, hasError).
+     */
+    public function test_machine_scopes(): void
+    {
+        // 1. Online machine
+        $onlineMachine = Machine::factory()->create(['last_heartbeat_at' => now()->subSeconds(10)]);
+        
+        // 2. Offline machine
+        $offlineMachine = Machine::factory()->create(['last_heartbeat_at' => now()->subSeconds(40)]);
+        
+        // 3. Online machine with error
+        $errorMachine = Machine::factory()->create(['last_heartbeat_at' => now()->subSeconds(5)]);
+        MachineLog::create([
+            'machine_id' => $errorMachine->id,
+            'level' => 'error',
+            'created_at' => now()->subMinutes(5),
+            'message' => 'Error log',
+        ]);
+
+        $this->assertEquals(2, Machine::online()->count());
+        $this->assertEquals(1, Machine::offline()->count());
+        $this->assertEquals(1, Machine::online()->hasError()->count());
+        
+        $this->assertTrue(Machine::online()->get()->contains($onlineMachine));
+        $this->assertTrue(Machine::offline()->get()->contains($offlineMachine));
+        $this->assertTrue(Machine::online()->hasError()->get()->contains($errorMachine));
+    }
+}