first commit

app/Models/Subunit.php

@@ -0,0 +1,20 @@
+<?php
+namespace App\Models;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Subunit extends Model
+{
+    use SoftDeletes;
+    protected $fillable = ['unit_id', 'subunit_no', 'subunit_type', 'area_sqft', 'status'];
+    
+    public function unit() { return $this->belongsTo(Unit::class); }
+    public function contracts() { return $this->belongsToMany(Contract::class, 'contract_subunits'); }
+    
+    protected static function boot()
+    {
+        parent::boot();
+        static::creating(fn($model) => $model->created_by = auth()->id());
+        static::updating(fn($model) => $model->updated_by = auth()->id());
+    }
+}