feat(dashboard): add pedimentos metrics and chart data to dashboard service

backend/api/v1/modules/core/dashboard/dto.py

@@ -63,6 +63,7 @@ class DashboardStats(BaseModel):
 
     # Datos para gráficas
     invoices_by_month: List[ChartDataPoint] = Field(default_factory=list)
+    pedimentos_by_month: List[ChartDataPoint] = Field(default_factory=list)
     operations_by_type: List[ChartDataPoint] = Field(default_factory=list)
     top_clients: List[ChartDataPoint] = Field(default_factory=list)
     top_providers: List[ChartDataPoint] = Field(default_factory=list)

backend/api/v1/modules/core/dashboard/service.py

@@ -18,6 +18,7 @@ from api.v1.modules.a76.clients_and_providers.models import (
     ClientOrProviderEnum,
 )
 from api.v1.modules.a76.general_catalogs.company.models import Company
+from api.v1.modules.a76.pedmientos.models.pedimentos import Pedimentos
 
 from .dto import (
     DashboardStats,
@@ -320,6 +321,70 @@ class DashboardService:
 
         return activities[:limit]
 
+    def get_pedimentos_metrics(self) -> tuple[KPIMetric, List[ChartDataPoint]]:
+        """Obtiene métricas de pedimentos"""
+        # Total de pedimentos actuales
+        current_total = (
+            self.db.query(func.count(Pedimentos.id))
+            .filter(
+                Pedimentos.tenant_id == self.tenant_id,
+                Pedimentos.company_id == self.company_id,
+            )
+            .scalar()
+            or 0
+        )
+
+        # Total del mes anterior para comparación
+        last_month = datetime.utcnow() - timedelta(days=30)
+        previous_total = (
+            self.db.query(func.count(Pedimentos.id))
+            .filter(
+                Pedimentos.tenant_id == self.tenant_id,
+                Pedimentos.company_id == self.company_id,
+                Pedimentos.created_at < last_month,
+            )
+            .scalar()
+            or 0
+        )
+
+        percentage, trend = self._calculate_trend(current_total, previous_total)
+
+        kpi = KPIMetric(
+            label="Total Pedimentos",
+            value=current_total,
+            previous_value=previous_total,
+            percentage_change=percentage,
+            trend=trend,
+        )
+
+        # Pedimentos por mes (últimos 6 meses)
+        six_months_ago = datetime.utcnow() - timedelta(days=180)
+
+        monthly_data = (
+            self.db.query(
+                func.date_trunc("month", Pedimentos.created_at).label("month"),
+                func.count(Pedimentos.id).label("count"),
+            )
+            .filter(
+                Pedimentos.tenant_id == self.tenant_id,
+                Pedimentos.company_id == self.company_id,
+                Pedimentos.created_at >= six_months_ago,
+            )
+            .group_by("month")
+            .order_by("month")
+            .all()
+        )
+
+        chart_data = [
+            ChartDataPoint(
+                label=row.month.strftime("%b %Y") if row.month else "Unknown",
+                value=float(row.count),
+            )
+            for row in monthly_data
+        ]
+
+        return kpi, chart_data
+
     def get_complete_dashboard_stats(self) -> DashboardStats:
         """Genera estadísticas completas para el dashboard"""
 
@@ -339,8 +404,8 @@ class DashboardService:
         operations_chart = self.get_operations_by_type()
         recent_activity = self.get_recent_activity()
 
-        # KPI de pedimentos (placeholder - implementar cuando exista el modelo)
-        pedimento_kpi = KPIMetric(label="Total Pedimentos", value=0, trend="stable")
+        # Obtener métricas de pedimentos
+        pedimento_kpi, pedimentos_chart = self.get_pedimentos_metrics()
 
         # KPI de aprobaciones pendientes
         pending_kpi = KPIMetric(label="Pendientes", value=0, trend="stable")
@@ -353,6 +418,7 @@ class DashboardService:
             active_items=items_kpi,
             pending_approvals=pending_kpi,
             invoices_by_month=invoices_chart,
+            pedimentos_by_month=pedimentos_chart,
             operations_by_type=operations_chart,
             top_clients=top_clients,
             top_providers=top_providers,