[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);
+    }
 }

app/Models/UserLoginLog.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory; // Added this line
+
+class UserLoginLog extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'user_id',
+        'ip_address',
+        'user_agent',
+        'login_at',
+    ];
+
+    protected $casts = [
+        'login_at' => 'datetime',
+    ];
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+}