[REFACTOR] 實作側邊欄與儀表板多語系化，修復 UI 位移與樣式優化

app/Models/System/User.php

@@ -46,4 +46,12 @@ class User extends Authenticatable
         'email_verified_at' => 'datetime',
         'password' => 'hashed',
     ];
+
+    /**
+     * Get the login logs for the user.
+     */
+    public function loginLogs()
+    {
+        return $this->hasMany(\App\Models\UserLoginLog::class);
+    }
 }