Initial commit: Horux Strategy Platform

- Laravel 11 backend with API REST
- React 18 + TypeScript + Vite frontend
- Multi-parser architecture for accounting systems (CONTPAQi, Aspel, SAP)
- 27+ financial metrics calculation
- PDF report generation with Browsershot
- Complete documentation (10 documents)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/app/Models/Balanza.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class Balanza extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'cliente_id',
+        'periodo_inicio',
+        'periodo_fin',
+        'sistema_origen',
+        'archivo_original',
+        'status',
+        'error_mensaje',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'periodo_inicio' => 'date',
+            'periodo_fin' => 'date',
+        ];
+    }
+
+    public function cliente(): BelongsTo
+    {
+        return $this->belongsTo(Cliente::class);
+    }
+
+    public function cuentas(): HasMany
+    {
+        return $this->hasMany(Cuenta::class);
+    }
+
+    public function reportes(): BelongsToMany
+    {
+        return $this->belongsToMany(Reporte::class, 'reporte_balanza');
+    }
+
+    public function cuentasActivas(): HasMany
+    {
+        return $this->hasMany(Cuenta::class)->where('excluida', false);
+    }
+
+    public function cuentasPadre(): HasMany
+    {
+        return $this->hasMany(Cuenta::class)->where('es_cuenta_padre', true);
+    }
+}