feat: importar csv y auditar ediciones

openspec/changes/add-navigation-csv-audit/specs/auditable-edits/spec.md

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+# Spec Delta
+
+## Purpose
+
+Garantiza que cambios posteriores al registro original de productores, productos y ventas sean explicables y aparezcan en la información exportada y reportada.
+
+## ADDED Requirements
+
+### Requirement: Editar registros operativos
+The system SHALL allow editing producers, products, and sales from the application UI.
+
+#### Scenario: Editar producto
+- **WHEN** user edits a product and confirms with actor and reason
+- **THEN** the product stores the new values
+- **AND** the edit appears in the audit history
+
+### Requirement: Auditoría obligatoria
+The system SHALL require actor and non-empty reason for every edit and SHALL store before and after values with timestamp.
+
+#### Scenario: Edición sin motivo
+- **WHEN** user attempts to save an edit without actor or reason
+- **THEN** the edit is not persisted
+- **AND** an inline validation message identifies the missing data
+
+### Requirement: Corrección de venta trazable
+The system SHALL update inventory consistently when an existing sale is edited and SHALL preserve the original and corrected sale snapshots.
+
+#### Scenario: Cambiar cantidad vendida
+- **WHEN** user changes a sale line quantity with a valid audit reason
+- **THEN** compensating inventory movement is recorded
+- **AND** the audit entry identifies the original and new sale values

openspec/changes/add-navigation-csv-audit/specs/inventory-csv-import/spec.md

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+# Spec Delta
+
+## Purpose
+
+Permite cargar rápidamente el inventario inicial desde archivos CSV locales, creando sólo las entidades que no existen y evitando duplicados por diferencias de formato en los nombres.
+
+## ADDED Requirements
+
+### Requirement: Importar inventario CSV
+The system SHALL import CSV rows with product name, producer name, unit price, and optional quantity columns.
+
+#### Scenario: Importación válida
+- **GIVEN** a CSV with the required headers
+- **WHEN** user previews and confirms the import
+- **THEN** missing producers and products are created
+- **AND** a positive quantity creates an initial inventory movement
+- **AND** empty or zero quantity creates no movement
+
+### Requirement: Comparación normalizada
+The system SHALL match producer and product names ignoring case, accents, BOM, and redundant surrounding whitespace.
+
+#### Scenario: Evitar duplicado
+- **GIVEN** an existing producer `La Familia González`
+- **WHEN** CSV contains ` la familia gonzalez `
+- **THEN** the row uses the existing producer instead of creating a duplicate
+
+### Requirement: Errores de importación
+The system SHALL report invalid rows without persisting invalid records and SHALL show a summary of created, reused, skipped, and failed rows.
+
+#### Scenario: Precio inválido
+- **WHEN** a row has a non-numeric or negative price
+- **THEN** that row is rejected with its line number and reason
+- **AND** valid rows remain importable

openspec/changes/add-navigation-csv-audit/specs/navigation/spec.md

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+# Spec Delta
+
+## Purpose
+
+Permite que una persona siempre entienda dónde está y pueda volver a Inicio o al paso anterior sin depender del botón físico del dispositivo.
+
+## ADDED Requirements
+
+### Requirement: Navegación global visible
+The system SHALL show a shared navigation context with a home action, back action, and breadcrumbs on every application view.
+
+#### Scenario: Volver desde Jornada
+- **WHEN** user navigates from Inicio to Jornada
+- **THEN** the view shows the breadcrumb `Inicio > Jornada`
+- **AND** selecting Inicio returns to the dashboard
+- **AND** selecting Atrás returns to the previous route
+
+#### Scenario: Fallback de Atrás
+- **GIVEN** the user opened a deep link without router history
+- **WHEN** user selects Atrás
+- **THEN** the system navigates to Inicio instead of leaving the application
+
+### Requirement: Navegación responsive
+The system SHALL expose the same destinations through a visible desktop menu and an accessible mobile menu.
+
+#### Scenario: Menú móvil
+- **WHEN** viewport width is narrow
+- **THEN** user can open the menu, choose Inventario, close it, and return to Inicio