feat: Add change orders system with client approval/rejection and integrate with client portal

app/Models/ChangeOrder.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class ChangeOrder extends Model
+{
+    protected $fillable = [
+        'project_id',
+        'title',
+        'description',
+        'amount',
+        'status',
+        'requested_at',
+        'responded_at',
+        'responded_by',
+    ];
+
+    protected $casts = [
+        'requested_at' => 'date',
+        'responded_at' => 'date',
+        'amount' => 'decimal:2',
+    ];
+
+    public function project(): BelongsTo
+    {
+        return $this->belongsTo(Project::class);
+    }
+
+    public function responder(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'responded_by');
+    }
+}

app/Models/Project.php

@@ -8,16 +8,22 @@ use Illuminate\Database\Eloquent\Model;
 class Project extends Model
 {
     use HasFactory;
+    use HasFactory;
 
     protected $fillable = [
         'name', 'address', 'lat', 'lng', 'start_date', 'end_date_estimated', 'status', 'created_by'
     ];
 
     protected $casts = [
-        'start_date' => 'date',
-        'end_date_estimated' => 'date',
+        "start_date" => "date",
+        "end_date_estimated" => "date",
     ];
 
+    public function changeOrders()
+    {
+        return $this->hasMany(ChangeOrder::class);
+    }
+
     // Relationships
     public function phases()
     {