Add LOA feature, improve components

app/Absence.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Absence extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+      'requesterID',
+      'start',
+      'predicted_end',
+      'available_assist',
+      'reason',
+      'status',
+      'reviewer',
+      'reviewed_date'
+    ];
+
+    public function requester(): BelongsTo
+    {
+        return $this->belongsTo('App\User', 'requesterID', 'id');
+    }
+}