done restructure calculation retribution

app/Models/SpatialPlanning.php

@@ -2,10 +2,9 @@
 
 namespace App\Models;
 
+use App\Traits\HasRetributionCalculation;
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\HasOne;
-use Illuminate\Database\Eloquent\Relations\HasMany;
-use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
 
 /**
  * Class SpatialPlanning
@@ -26,6 +25,7 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
  */
 class SpatialPlanning extends Model
 {
+    use HasRetributionCalculation;
     
     protected $perPage = 20;
 
@@ -44,45 +44,7 @@ class SpatialPlanning extends Model
         'date' => 'date'
     ];
 
-    /**
-     * Retribution proposals relationship (1:many)
-     */
-    public function retributionProposals(): HasMany
-    {
-        return $this->hasMany(RetributionProposal::class);
-    }
 
-    /**
-     * Building function relationship (if building_function becomes FK in future)
-     */
-    public function buildingFunctionRelation(): BelongsTo
-    {
-        return $this->belongsTo(BuildingFunction::class, 'building_function_id');
-    }
-
-    /**
-     * Check if spatial planning has retribution proposals
-     */
-    public function hasRetributionProposals(): bool
-    {
-        return $this->retributionProposals()->exists();
-    }
-
-    /**
-     * Get latest retribution proposal
-     */
-    public function getLatestRetributionProposal()
-    {
-        return $this->retributionProposals()->latest()->first();
-    }
-
-    /**
-     * Get all retribution proposals
-     */
-    public function getAllRetributionProposals()
-    {
-        return $this->retributionProposals()->get();
-    }
 
     /**
      * Get building function text for detection
@@ -100,21 +62,7 @@ class SpatialPlanning extends Model
         return (float) ($this->area ?? $this->land_area ?? 0);
     }
 
-    /**
-     * Scope: Without retribution proposals
-     */
-    public function scopeWithoutRetributionProposals($query)
-    {
-        return $query->whereDoesntHave('retributionProposals');
-    }
 
-    /**
-     * Scope: With retribution proposals
-     */
-    public function scopeWithRetributionProposals($query)
-    {
-        return $query->whereHas('retributionProposals');
-    }
 
 
 }