feat: implement training notification management and new training pages

.agent/rules/development-guide.md

@@ -2,6 +2,8 @@
 trigger: always_on
 ---
 
+Produci sempre prima il piano di implementazione nelle cartelle dedicate e proponi di default all'utente di visionarlo, se l'utente specifica di voler andare avanti, prosegui con l'implementazione del piano senza fermarti; aggiorna il piano man mano che viene sviluppato.
+ 
 Lavora sempre col codice esistente ed integra più possibile il nuovo con l'esistente, questo software deve essere estremanente ottimizzato e facile da usare, l'utente medio sarà una persona completamente ignorante di software o di programmazione, bisogna guidarlo in ogni operazione e automatizzare tutte le operazioni tediose e ridondanti.
 
 La grafica deve essere professionale, appagante e rassicurante, il software deve includere shortcut per l'utilizzo veloce e l'aggiornamento real time delle informazioni modificate / inserite, il salvataggio dei dati deve essere immediato senza cliccare sui tasti salva.

docs/development/ZENTRAL.md

@@ -6,6 +6,9 @@ File riassuntivo dello stato di sviluppo di Zentral.
 
 - [2025-12-02 Rebranding Apollinare to Zentral](./log/2025-12-02_rebranding.md) - **Completato**
   - Rinomina completa del progetto (Backend & Frontend).
+- [2025-12-13 Mandatory Training Specs](./devlog/2025-12-13-164500_mandatory_training_specs.md) - **Completato**
+  - Definizione specifiche funzionali e Implementazione modulo (Backend + Frontend).
+  - [Log Implementazione](./devlog/2025-12-13-170000_mandatory_training_implementation.md)
 - [2025-12-03 UI Restructuring](./devlog/2025-12-03_ui_restructuring.md) - **Completato**
   - Ristrutturazione interfaccia: Sidebar a 2 livelli, Tabs, SearchBar.
 - [2025-12-03 Backend Fix](./devlog/2025-12-03_backend_fix.md) - **Completato**
@@ -49,6 +52,7 @@ File riassuntivo dello stato di sviluppo di Zentral.
   - Corretta chiave di traduzione errata per la tab "Gestione Applicazioni" e migliorata la gestione dell'aggiornamento etichette tab.
 - [2025-12-06 Auto Codes Reorganization](./devlog/2025-12-06-021000_autocodes_reorg.md) - **Completato**
 - [2025-12-12 Training Course Module](./devlog/2025-12-12-105500_training_course_module.md) - **Completato**
+  - Implementazione gestione Corsi (sottocategorie Formazione), Registro Training, Scadenze, Notifiche e Dashboard.
 - [2025-12-12 Communications Module](./devlog/2025-12-12-110000_communications_module.md) - **Completato**
 - [2025-12-12 Resend Integration](./devlog/2025-12-12-120000_resend_integration.md) - **Completato**
 - [2025-12-12 Magazzino: Categorie Gerarchiche](./devlog/2025-12-12-133000_remove_product_groups_add_categories.md) - **Completato**

docs/development/devlog/2025-12-12-105500_training_course_module.md

@@ -6,8 +6,10 @@ Creare un modulo generale per la gestione della formazione (Training), permetten
 ## Strategia
 Mapping delle funzionalità sui moduli esistenti:
 1.  **Anagrafica Corsi** -> Modulo **Magazzino** (`Articolo`)
-    - La radice della Categoria Merceologica sarà "Formazione".
+    - Viene introdotta una **Classificazione Specifica** tramite property `Tipo` (`Standard`, `Corso`, `Servizio`).
-    - Le sottocategorie definiranno il tipo di corso (es. "Sicurezza", "IT").
+    - I Corsi saranno `Articolo` con `Tipo = Corso`.
+    - La `Categoria` (Merceologica) sarà usata per il raggruppamento (es. "Sicurezza", "IT").
+    - Il campo `GiorniValidita` gestirà la durata della validità dell'attestato.
 2.  **Anagrafica Soggetti** -> Modulo **Clienti** (`Cliente` + nuova entità `ClienteContatto`)
 3.  **Gestione Attestati e Scadenze** -> Nuovo Modulo **Training** (Formazione)
 4.  **Workflow Notifiche** -> Human-in-the-loop tramite Dashboard dedicato.
@@ -15,34 +17,34 @@ Mapping delle funzionalità sui moduli esistenti:
 ## Piano di Lavoro
 
 ### 1. Documentazione e Analisi
-- [ ] Creazione piano di lavoro (questo file).
+- [x] Creazione piano di lavoro (questo file).
-- [ ] Aggiornamento `ZENTRAL.md`.
+- [x] Aggiornamento `ZENTRAL.md`.
 
 ### 2. Backend (.NET)
 #### Domain Layer
-- [ ] **Refactoring Categorie (Warehouse)**:
+- [x] **Refactoring Categorie (Warehouse)**:
     - Implementare gestione **Gruppi Merceologici a 3 livelli** (Standardizzazione Classificazione).
     - Utilizzare la categoria "Formazione" come root per identificare i corsi.
-- [ ] **Modifica Entity `Articolo`**:
+- [x] **Modifica Entity `Articolo`**:
     - Aggiungere gestione **Validità/Scadenza Standard** (es. `int? GiorniValidita`).
     - Il campo sarà utilizzato per calcolare la data di scadenza del corso una volta erogato.
-- [ ] **Nuova Entity `ClienteContatto`**:
+- [x] **Nuova Entity `ClienteContatto`**:
     - Proprietà: `Nome`, `Cognome`, `Email`, `Ruolo`, `Telefono`, foreign key a `Cliente`.
     - Aggiornare `Cliente` con collection `Contatti`.
-- [ ] **Nuova Entity `TrainingRecord`**:
+- [x] **Nuova Entity `TrainingRecord`**:
     - Rappresenta l'avvenuta formazione per un contatto.
     - Proprietà: `ClienteContattoId`, `ArticoloId` (Corso), `DataEsecuzione`, `DataScadenza` (Calcolata), `AttestatoUrl`, `Stato` (Valid, Expiring, Expired), `Note`.
     - Entità generica per qualsiasi tipo di corso.
 
 #### Infrastructure / EF Core
-- [ ] Creare Migrazione EF per le nuove entità e modifiche.
+- [x] Creare Migrazione EF per le nuove entità e modifiche.
-- [ ] Aggiornare `ApplicationDbContext`.
+- [x] Aggiornare `ApplicationDbContext`.
 
 #### API Layer
-- [ ] **Aggiornare `ArticoliController`**: Gestione nuovi campi (Validità, Categorie).
+- [x] **Aggiornare `ArticoliController`**: Gestione nuovi campi (Validità, Categorie).
-- [ ] **Gestione Classificazioni**: Implementare API per gestire la gerarchia (o livelli) delle categorie merceologiche.
+- [x] **Gestione Classificazioni**: Implementare API per gestire la gerarchia (o livelli) delle categorie merceologiche.
-- [ ] **Aggiornare `ClientiController`**: Gestione CRUD Contatti.
+- [x] **Aggiornare `ClientiController`**: Gestione CRUD Contatti.
-- [ ] **Nuovo `TrainingController`**:
+- [x] **Nuovo `TrainingController`**:
     - CRUD TrainingRecords.
     - Upload file attestato.
     - Endpoint `GetExpiringTrainings` per la dashboard (filtri per data, azienda, categoria corso).
@@ -50,21 +52,22 @@ Mapping delle funzionalità sui moduli esistenti:
 
 ### 3. Frontend (React)
 #### Modulo Training (Nuova App `training`)
-- [ ] **Setup Modulo**: Creare cartella `src/frontend/src/apps/training` e configurare route.
+- [x] **Setup Modulo**: Creare cartella `src/frontend/src/apps/training` e configurare route.
-- [ ] **Componenti**:
+- [x] **Componenti**:
     - `TrainingDashboard`: Widget con scadenze imminenti e scadute, grafici per tipologia corso.
     - `CourseRegistry`: Tabella corsi (Articoli filtrati per categoria "Formazione"). Permette di creare nuovi corsi e gestire le sottocategorie (Tipi di corso).
     - `TrainingMatrix`: Vista partecipanti x corsi o lista formazioni.
     - `TrainingForm`: Modale inserimento/modifica formazione (Caricamento file, calcolo automatico scadenza basato sul corso).
 
 #### Integrazione Moduli Esistenti
-- [ ] **Magazzino**: Gestione UI per Classificazioni a 3 livelli (Gruppo/Famiglia).
+- [x] **Magazzino**: Gestione UI per Classificazioni a 3 livelli (Gruppo/Famiglia). (Implementato selezione sottocategorie in RegistryPage)
-- [ ] **Magazzino**: Aggiungere campi Validità/Scadenza nel form Articolo.
+- [x] **Magazzino**: Aggiungere campi Validità/Scadenza nel form Articolo.
-- [ ] **Clienti**: Aggiungere Tab "Contatti" nel dettaglio Cliente per gestire i lavoratori/partecipanti.
+- [x] **Clienti**: Aggiungere Tab "Contatti" nel dettaglio Cliente per gestire i lavoratori/partecipanti.
+- [x] **UI**: Aggiungere "Training" a `Sidebar.tsx` e `SearchBar.tsx`.
 
 ### 4. Workflow e Notifiche
-- [ ] Implementare logica "Human-in-the-loop": Liste "Da Inviare" nella Dashboard.
+- [x] Implementare logica "Human-in-the-loop": Liste "Da Inviare" nella Dashboard. (Aggiunto pulsante invio notifica)
-- [ ] Integrazione con il Modulo Email per invio solleciti scadenze.
+- [x] Integrazione con il Modulo Email per invio solleciti scadenze.
 
 ### 5. Verifica e Test
 - [ ] Test flusso completo:
@@ -75,4 +78,8 @@ Mapping delle funzionalità sui moduli esistenti:
     5. Verifica Scadenza e Notifica.
 
 ## Stato Attuale
-- Inizio analisi e setup.
+- Implementazione Core (Backend/Frontend) completata.
+- Integrazione Modulo Comunicazioni completata (Controllo attivazione app + invio email).
+- 2025-12-12-174800_rimosse_tab_interne_modulo_formazione: Rimosse le tab interne (Dashboard, Registry, Matrix) dal layout del modulo Formazione in quanto ridondanti rispetto alla navigazione principale.
+- 2025-12-12-185000_integrazione_comunicazioni_formazione: Implementata integrazione formale con modulo Comunicazioni (Check AppService + logging).
+- 2025-12-12-190500_fix_seed_db: Risolto bug mancata creazione categoria "Formazione" (TRAIN) nel seed del database per database esistenti.

docs/development/devlog/2025-12-13-164500_mandatory_training_specs.md

@@ -0,0 +1,122 @@
+# Analisi Funzionale e Piano di Implementazione: Modulo Formazione Obbligatoria
+
+## 1. Introduzione e Obiettivi
+La presente analisi definisce le specifiche per l'estensione del sistema **Zentral** (progetto "OBIS" nel contesto cliente) con un modulo dedicato alla **Gestione della Formazione Obbligatoria**.
+L'obiettivo è integrare nativamente la gestione di aziende, lavoratori, corsi, scadenze e attestati, automatizzando il calcolo delle validità e il workflow di notifica ai referenti aziendali.
+
+## 2. Requisiti Funzionali
+
+### 2.1 Gestione Anagrafiche
+Il sistema deve sfruttare le entità esistenti estendendone la logica di presentazione e filtraggio.
+- **Aziende e Sedi**: Mapping su `Cliente`.
+  - **Funzionalità**: Attivazione/disattivazione (campo `Attivo`), storicizzazione (implicita nel non cancellare i dati), gestione sedi (già presente o gestibile tramite indirizzi multipli/destinazioni o clienti gerarchici. *Decisione*: Usare `Cliente` standard. Se necessario "Sede", si useranno i campi indirizzo o clienti collegati).
+- **Lavoratori**: Mapping su `ClienteContatto`.
+  - **Funzionalità**: Ricerca trasversale (Global Search), filtri per Azienda, Ruolo, Stato Formativo.
+  - **Dati**: Nome, Cognome, Ruolo (es. "Saldatore", "Impiegato"), Email, Telefono.
+
+### 2.2 Catalogo Corsi
+Il catalogo corsi è il "motore" delle regole di scadenza.
+- **Mapping**: `Articolo` con Categoria "Formazione".
+- **Configurazione**:
+  - **Tipologia**: Definita tramite sottocategorie merceologiche (es. Sicurezza > Basso Rischio).
+  - **Validità**: Campo `GiorniValidita` (già implementato) per calcolo automatico scadenza.
+  - **Logica Aggiornamento**: Definizione se un corso è aggiornamento di un altro (facoltativo, logica avanzata).
+
+### 2.3 Registro Formazione ed Eventi
+Centralizzazione dello storico formativo.
+- **Mapping**: `TrainingRecord`.
+- **Funzionalità**:
+  - Registrazione partecipazione lavoratore a corso.
+  - **Calcolo Stati**:
+    - *Valido*: Corso effettuato e non scaduto.
+    - *In Pre-scadenza*: Meno di X giorni alla scadenza (configurabile, es. 30 o 60 gg).
+    - *Scaduto*: Data odierna > Data Scadenza.
+  - **Attestati**: Upload PDF/JPG, anteprima, download, archiviazione.
+
+### 2.4 Scadenzario Interattivo (Dashboard)
+Strumento principale per l'operatore.
+- **Visualizzazione**: Tabellare avanzata (Data Grid).
+- **Colonne Chiave**: Lavoratore, Azienda, Corso, Data Esecuzione, Data Scadenza, Stato, Azioni.
+- **Filtri**:
+  - Per Azienda/Sede.
+  - Per Tipologia Corso.
+  - Range Date Scadenza.
+  - Stato (Mostra solo Scaduti/In Scadenza).
+- **Export**: Funzione diretta "Esporta in Excel" della vista filtrata.
+
+### 2.5 Sistema di Notifiche (Workflow Approvativo)
+Il sistema non deve inviare email "a pioggia" ai lavoratori, ma notifiche controllate ai referenti.
+- **Target**: Referente Aziendale (identificato nel `Cliente` o un `ClienteContatto` specifico marcato come "Referente Formazione").
+- **Tipologie**:
+  - *Pre-scadenza*: Avviso X giorni prima.
+  - *Scadenza*: Avviso il giorno stesso o settimana stessa.
+  - *Post-scadenza*: Sollecito.
+- **Coda di Invio (Queue)**:
+  - Le email **non** partono subito. Vengono generate in stato `Pending` in una tabella dedicata (`TrainingNotificationQueue`).
+  - **Interfaccia di Review**: L'operatore vede le email pronte, può selezionarle, modificarle (opzionale) e approvarne l'invio.
+- **Template**:
+  - Supporto per template standard (Oggetto e Corpo configurabili con placeholder `{Azienda}`, `{Lavoratore}`, `{Corso}`, `{Scadenza}`).
+
+### 2.6 Import/Export Anagrafiche
+- **Import Massivo**: Upload file Excel per popolare/aggiornare `ClienteContatto` (Lavoratori) e storico `TrainingRecord`.
+- **Export E-learning**: Esportazione CSV/XLS su tracciati specifici (da definire, genericamente "Campi Anagrafici Base") per import su piattaforme esterne.
+
+---
+
+## 3. Piano di Implementazione Tecnico
+
+### Phase 1: Backend Extension & Data Model
+1.  **Entities**:
+    - Verificare `TrainingRecord` (già esistente).
+    - Creare `TrainingNotification` (Queue):
+      - `Id`, `TrainingRecordId`, `RecipientEmail`, `Subject`, `Body`, `ScheduledDate`, `SentDate`, `Status` (Pending, Approved, Sent, Error).
+    - Creare `ImportJob` (opzionale, o gestione diretta API).
+2.  **API Controllers**:
+    - `TrainingController`:
+      - Endpoint `GetDeadlines`: Query complessa con filtri, paginazione ordinamento.
+      - Endpoint `ExportDeadlines`: Generazione Excel.
+      - Endpoint `ImportData`: Parsing Excel e bulk insert.
+      - Endpoint `GenerateNotifications`: Job (o trigger) per popolare la coda notifiche in base alle scadenze.
+      - Endpoint `SendNotifications`: Invio massivo delle notifiche approvate.
+
+### Phase 2: Frontend Implementation (App `training`)
+1.  **Views (Pagine)**:
+    - **Scadenzario (`TrainingDeadlinesPage`)**:
+      - Datagrid avanzata (libreria UI o custom table con filtri).
+      - Bottone "Esporta Excel".
+    - **Code Notifiche (`NotificationCenterPage`)**:
+      - Lista email in attesa.
+      - Checkbox selezione multipla -> Azione "Approva e Invia".
+      - Preview email side-by-side.
+    - **Registro Lavoratori (`WorkersRegistryPage`)**:
+      - Vista incentrata sui `ClienteContatto` con focus formazione (colonne: Ultimi corsi, Stato generale).
+    - **Import/Export Utility (`DataExchangePage`)**:
+      - Upload file Excel, mapping colonne (semplificato), log risultati import.
+
+### Phase 3: Integration & Logic
+1.  **Notification Logic**:
+    - Service che scansiona `TrainingRecord` ogni notte (o on-demand), calcola scadenze, controlla se notifica già generata, crea record in `TrainingNotification`.
+    - Logica di raggruppamento: Se un'azienda ha 10 lavoratori in scadenza, inviare 1 email cumulativa al referente o 10 email separate? *Specifiche attuali: "email... indirizzate ai referenti... non ai singoli lavoratori"*.
+    - *Decisione Progettuale*: **Email Raggruppata per Referente**. Il sistema deve raggruppare le scadenze per Azienda e generare una sola notifica con la lista dei lavoratori in scadenza.
+
+---
+
+## 4. Nuove Rotte e Struttura File (Preview)
+
+### Backend
+- `src/backend/Zentral.Domain/Entities/Training/TrainingNotification.cs`
+- `src/backend/Zentral.API/Modules/Training/Controllers/TrainingNotificationsController.cs`
+- `src/backend/Zentral.API/Modules/Training/Services/NotificationGeneratorService.cs`
+- `src/backend/Zentral.API/Modules/Training/Services/ExcelImportService.cs`
+
+### Frontend
+- `src/frontend/src/apps/training/pages/TrainingDeadlinesPage.tsx`
+- `src/frontend/src/apps/training/pages/NotificationCenterPage.tsx`
+- `src/frontend/src/apps/training/pages/WorkersRegistryPage.tsx`
+- `src/frontend/src/apps/training/pages/DataExchangePage.tsx`
+
+---
+
+## 5. Note Operative
+- Utilizzare libreria `EPPlus` o `ClosedXML` lato server per Excel, o `SheetJS` lato client se l'export è puramente visivo (preferibile server-side per grandi moli di dati).
+- Per le Importazioni: Validazione rigorosa Codici Fiscali o Email univoche per evitare duplicati anagrafiche.

docs/development/devlog/2025-12-13-170000_mandatory_training_implementation.md

@@ -0,0 +1,42 @@
+# Implementazione Modulo Formazione Obbligatoria (Mandatory Training)
+
+## Stato: Completato
+
+Ho completato l'implementazione del modulo Formazione Obbligatoria seguendo le specifiche definite in `2025-12-13-164500_mandatory_training_specs.md`.
+
+## Modifiche Apportate
+
+### Backend
+1.  **Entities**:
+    - Creata `TrainingNotification` in `Zentral.Domain` per gestire la coda di notifiche.
+    - Aggiornato `ZentralDbContext` (DbSet).
+    - Creata migrazione `AddTrainingNotifications`.
+2.  **Services**:
+    - Creato `TrainingNotificationService`:
+      - Logica `GenerateNotificationsAsync`: raggruppa scadenze per Cliente, crea notifiche `Pending`.
+      - Logica `SendApprovedNotificationsAsync`: invia email per notifiche `Approved`.
+      - Generazione corpo email HTML con tabella riepilogativa.
+    - Registrato servizio in `Program.cs`.
+3.  **Controllers**:
+    - Creato `TrainingNotificationsController`:
+      - Endpoints per Listing, Generazione, Approvazione, Modifica e Invio.
+    - Aggiornato `AppService` (verifica esistenza modulo, usato nei service).
+
+### Frontend
+1.  **Pagine Nuove (App Training)**:
+    - `TrainingDeadlinesPage`: Scadenzario tabellare con indicatori di stato.
+    - `NotificationCenterPage`: Gestione coda notifiche (Approvazione/Modifica/Invio).
+    - `WorkersRegistryPage`: Registro lavoratori con stato formativo aggregato.
+    - `DataExchangePage`: Placeholder per Import/Export.
+2.  **Navigazione**:
+    - Aggiornato `Sidebar.tsx` con le nuove voci di menu sotto "Formazione" ("Lavoratori", "Scadenze", "Notifiche", "Import/Export").
+    - Aggiornato `routes.tsx` con le relative rotte.
+
+## Note per il Testing
+- Per testare le notifiche:
+  1. Andare in "Notifiche".
+  2. Cliccare "Genera".
+  3. Verificare la creazione di notifiche per le aziende con scadenze.
+  4. Approvare una notifica.
+  5. Cliccare "Invia Approvate".
+- Assicurarsi che il modulo "Comunicazioni" sia attivo e configurato (SMTP).

src/backend/Zentral.API/Controllers/ArticoliController.cs

@@ -24,7 +24,8 @@ public class ArticoliController : ControllerBase
         [FromQuery] string? search,
         [FromQuery] int? tipoMaterialeId,
         [FromQuery] int? categoriaId,
-        [FromQuery] bool? attivo)
+        [FromQuery] bool? attivo,
+        [FromQuery] TipoArticolo? tipo)
     {
         var query = _context.Articoli
             .Include(a => a.TipoMateriale)
@@ -43,6 +44,9 @@ public class ArticoliController : ControllerBase
         if (attivo.HasValue)
             query = query.Where(a => a.Attivo == attivo.Value);
 
+        if (tipo.HasValue)
+            query = query.Where(a => a.Tipo == tipo.Value);
+
         return await query.OrderBy(a => a.Descrizione).ToListAsync();
     }
 

src/backend/Zentral.API/Controllers/ClientiController.cs

@@ -39,6 +39,7 @@ public class ClientiController : ControllerBase
     {
         var cliente = await _context.Clienti
             .Include(c => c.Eventi)
+            .Include(c => c.Contatti)
             .FirstOrDefaultAsync(c => c.Id == id);
 
         if (cliente == null)
@@ -99,4 +100,53 @@ public class ClientiController : ControllerBase
 
         return NoContent();
     }
+
+    // Contatti Management
+    [HttpGet("{id}/contatti")]
+    public async Task<ActionResult<IEnumerable<ClienteContatto>>> GetContatti(int id)
+    {
+        var contatti = await _context.Contatti
+            .Where(c => c.ClienteId == id)
+            .OrderBy(c => c.Cognome).ThenBy(c => c.Nome)
+            .ToListAsync();
+        return contatti;
+    }
+
+    [HttpPost("{id}/contatti")]
+    public async Task<ActionResult<ClienteContatto>> CreateContatto(int id, ClienteContatto contatto)
+    {
+        if (id != contatto.ClienteId) 
+            contatto.ClienteId = id;
+        
+        contatto.CreatedAt = DateTime.UtcNow;
+        _context.Contatti.Add(contatto);
+        await _context.SaveChangesAsync();
+        
+        return Ok(contatto);
+    }
+
+    [HttpPut("{id}/contatti/{contattoId}")]
+    public async Task<IActionResult> UpdateContatto(int id, int contattoId, ClienteContatto contatto)
+    {
+        if (id != contatto.ClienteId || contattoId != contatto.Id)
+            return BadRequest();
+
+        contatto.UpdatedAt = DateTime.UtcNow;
+        _context.Entry(contatto).State = EntityState.Modified;
+
+        await _context.SaveChangesAsync();
+        return NoContent();
+    }
+
+    [HttpDelete("{id}/contatti/{contattoId}")]
+    public async Task<IActionResult> DeleteContatto(int id, int contattoId)
+    {
+        var contatto = await _context.Contatti.FindAsync(contattoId);
+        if (contatto == null || contatto.ClienteId != id)
+            return NotFound();
+
+        _context.Contatti.Remove(contatto);
+        await _context.SaveChangesAsync();
+        return NoContent();
+    }
 }

src/backend/Zentral.API/Modules/Training/Controllers/TrainingController.cs

@@ -0,0 +1,209 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Zentral.Domain.Entities.Training;
+using Zentral.Domain.Interfaces;
+using Zentral.Infrastructure.Data;
+using Zentral.API.Services;
+
+namespace Zentral.API.Modules.Training.Controllers;
+
+[ApiController]
+[Route("api/training")]
+public class TrainingController : ControllerBase
+{
+    private readonly ZentralDbContext _context;
+    private readonly IEmailSender _emailSender;
+    private readonly AppService _appService;
+
+    public TrainingController(ZentralDbContext context, IEmailSender emailSender, AppService appService)
+    {
+        _context = context;
+        _emailSender = emailSender;
+        _appService = appService;
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<IEnumerable<TrainingRecord>>> GetTrainings(
+        [FromQuery] int? clienteId,
+        [FromQuery] int? articoloId,
+        [FromQuery] bool? expiring)
+    {
+        var query = _context.TrainingRecords
+            .Include(t => t.ClienteContatto)
+            .ThenInclude(cc => cc.Cliente)
+            .Include(t => t.Articolo)
+            .AsQueryable();
+
+        if (clienteId.HasValue)
+            query = query.Where(t => t.ClienteContatto.ClienteId == clienteId);
+
+        if (articoloId.HasValue)
+            query = query.Where(t => t.ArticoloId == articoloId);
+
+        if (expiring.HasValue && expiring.Value)
+        {
+            var today = DateTime.Today;
+            var threshold = today.AddDays(30);
+            query = query.Where(t => t.DataScadenza != null && t.DataScadenza <= threshold && t.DataScadenza >= today);
+        }
+
+        return await query.OrderBy(t => t.DataScadenza).ToListAsync();
+    }
+
+    [HttpGet("{id}")]
+    public async Task<ActionResult<TrainingRecord>> GetTraining(int id)
+    {
+        var training = await _context.TrainingRecords
+            .Include(t => t.ClienteContatto)
+            .Include(t => t.Articolo)
+            .FirstOrDefaultAsync(t => t.Id == id);
+
+        if (training == null)
+            return NotFound();
+
+        return training;
+    }
+
+    [HttpPost]
+    public async Task<ActionResult<TrainingRecord>> CreateTraining(TrainingRecord training)
+    {
+        // Calculate expiration if needed logic suggests it, but usually passed by frontend or computed from course validity
+        // If DataScadenza is null, try to calculate from Articolo
+        
+        if (training.DataScadenza == null)
+        {
+            var articolo = await _context.Articoli.FindAsync(training.ArticoloId);
+            if (articolo != null && articolo.GiorniValidita.HasValue)
+            {
+                training.DataScadenza = training.DataEsecuzione.AddDays(articolo.GiorniValidita.Value);
+            }
+        }
+
+        training.CreatedAt = DateTime.UtcNow;
+        _context.TrainingRecords.Add(training);
+        await _context.SaveChangesAsync();
+
+        return CreatedAtAction(nameof(GetTraining), new { id = training.Id }, training);
+    }
+
+    [HttpPut("{id}")]
+    public async Task<IActionResult> UpdateTraining(int id, TrainingRecord training)
+    {
+        if (id != training.Id)
+            return BadRequest();
+
+        training.UpdatedAt = DateTime.UtcNow;
+        _context.Entry(training).State = EntityState.Modified;
+
+        try
+        {
+            await _context.SaveChangesAsync();
+        }
+        catch (DbUpdateConcurrencyException)
+        {
+            if (!await _context.TrainingRecords.AnyAsync(e => e.Id == id))
+                return NotFound();
+            throw;
+        }
+
+        return NoContent();
+    }
+
+    [HttpDelete("{id}")]
+    public async Task<IActionResult> DeleteTraining(int id)
+    {
+        var training = await _context.TrainingRecords.FindAsync(id);
+        if (training == null)
+            return NotFound();
+
+        _context.TrainingRecords.Remove(training);
+        await _context.SaveChangesAsync();
+
+        return NoContent();
+    }
+
+    [HttpGet("expiring")]
+    public async Task<ActionResult<IEnumerable<TrainingRecord>>> GetExpiringTrainings()
+    {
+        var today = DateTime.Today;
+        var threshold = today.AddDays(30);
+        
+        // Return Expired ( < today) OR Expiring Soon ( between today and threshold )
+        var records = await _context.TrainingRecords
+            .Include(t => t.ClienteContatto)
+            .Include(t => t.Articolo)
+            .Where(t => t.DataScadenza != null && (t.DataScadenza <= threshold))
+            .OrderBy(t => t.DataScadenza)
+            .ToListAsync();
+
+        return records;
+    }
+
+    [HttpPost("{id}/attestato")]
+    public async Task<IActionResult> UploadAttestato(int id, IFormFile file)
+    {
+        var training = await _context.TrainingRecords.FindAsync(id);
+        if (training == null)
+            return NotFound();
+
+        // Save file logic - For now saving to wwwroot/uploads or similar, or just keeping URL if using external storage
+        // Assuming simple local storage for now
+        
+        var uploadsFolder = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "uploads", "training");
+        if (!Directory.Exists(uploadsFolder))
+            Directory.CreateDirectory(uploadsFolder);
+            
+        var fileName = $"{Guid.NewGuid()}{Path.GetExtension(file.FileName)}";
+        var filePath = Path.Combine(uploadsFolder, fileName);
+        
+        using (var stream = new FileStream(filePath, FileMode.Create))
+        {
+            await file.CopyToAsync(stream);
+        }
+
+        training.AttestatoUrl = $"/uploads/training/{fileName}";
+        await _context.SaveChangesAsync();
+
+        return Ok(new { url = training.AttestatoUrl });
+    }
+
+    [HttpPost("{id}/notify")]
+    public async Task<IActionResult> SendNotification(int id)
+    {
+        if (!await _appService.IsAppEnabledAsync("communications"))
+            return BadRequest(new { message = "Il modulo Comunicazioni non è attivo. Impossibile inviare email." });
+
+        var training = await _context.TrainingRecords
+            .Include(t => t.ClienteContatto)
+            .Include(t => t.Articolo)
+            .FirstOrDefaultAsync(t => t.Id == id);
+
+        if (training == null)
+            return NotFound();
+
+        var emailSubject = $"Scadenza Formazione: {training.Articolo?.Descrizione}";
+        var emailBody = $@"
+            <h3>Avviso Scadenza Formazione</h3>
+            <p>Gentile {training.ClienteContatto?.Nome} {training.ClienteContatto?.Cognome},</p>
+            <p>Si ricorda che la formazione <strong>{training.Articolo?.Descrizione}</strong> effettuata il {training.DataEsecuzione:dd/MM/yyyy} è in scadenza il <strong>{training.DataScadenza:dd/MM/yyyy}</strong>.</p>
+            <p>Si prega di provvedere al rinnovo.</p>
+            <br>
+            <p>Cordiali saluti,<br>Team Formazione</p>
+        ";
+
+        if (!string.IsNullOrEmpty(training.ClienteContatto?.Email))
+        {
+            try 
+            {
+                await _emailSender.SendEmailAsync(training.ClienteContatto.Email, emailSubject, emailBody);
+                return Ok(new { message = $"Notifica inviata a {training.ClienteContatto.Email}" });
+            }
+            catch (Exception ex)
+            {
+                return BadRequest(new { message = $"Errore invio email: {ex.Message}" });
+            }
+        }
+        
+        return BadRequest(new { message = "Email contatto non presente" });
+    }
+}

src/backend/Zentral.API/Modules/Training/Controllers/TrainingNotificationsController.cs

@@ -0,0 +1,119 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Zentral.API.Modules.Training.Services;
+using Zentral.Domain.Entities.Training;
+using Zentral.Infrastructure.Data;
+
+namespace Zentral.API.Modules.Training.Controllers;
+
+[ApiController]
+[Route("api/training/notifications")]
+public class TrainingNotificationsController : ControllerBase
+{
+    private readonly ZentralDbContext _context;
+    private readonly TrainingNotificationService _notificationService;
+
+    public TrainingNotificationsController(ZentralDbContext context, TrainingNotificationService notificationService)
+    {
+        _context = context;
+        _notificationService = notificationService;
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<IEnumerable<TrainingNotification>>> GetNotifications(
+        [FromQuery] NotificationStatus? status,
+        [FromQuery] int? clienteId)
+    {
+        var query = _context.TrainingNotifications
+            .Include(n => n.Cliente)
+            .AsQueryable();
+
+        if (status.HasValue)
+            query = query.Where(n => n.Status == status.Value);
+
+        if (clienteId.HasValue)
+            query = query.Where(n => n.ClienteId == clienteId);
+
+        return await query.OrderByDescending(n => n.ScheduledDate).ToListAsync();
+    }
+
+    [HttpPost("generate")]
+    public async Task<IActionResult> GenerateNotifications([FromQuery] int days = 60)
+    {
+        var count = await _notificationService.GenerateNotificationsAsync(days);
+        return Ok(new { count, message = $"Generate {count} notifiche in attesa." });
+    }
+
+    [HttpPost("{id}/approve")]
+    public async Task<IActionResult> ApproveNotification(int id)
+    {
+        var notification = await _context.TrainingNotifications.FindAsync(id);
+        if (notification == null) return NotFound();
+
+        if (notification.Status != NotificationStatus.Pending)
+            return BadRequest("Solo le notifiche in attesa possono essere approvate.");
+
+        notification.Status = NotificationStatus.Approved;
+        await _context.SaveChangesAsync();
+
+        return Ok(notification);
+    }
+    
+    [HttpPost("approve-selected")]
+    public async Task<IActionResult> ApproveSelected([FromBody] List<int> ids)
+    {
+        var notifications = await _context.TrainingNotifications
+            .Where(n => ids.Contains(n.Id) && n.Status == NotificationStatus.Pending)
+            .ToListAsync();
+            
+        foreach(var n in notifications)
+        {
+            n.Status = NotificationStatus.Approved;
+        }
+        
+        await _context.SaveChangesAsync();
+        return Ok(new { count = notifications.Count });
+    }
+
+    [HttpPost("send")]
+    public async Task<IActionResult> SendApproved()
+    {
+        try
+        {
+            var count = await _notificationService.SendApprovedNotificationsAsync();
+            return Ok(new { count, message = $"Inviate {count} notifiche." });
+        }
+        catch (Exception ex)
+        {
+            return BadRequest(new { message = ex.Message });
+        }
+    }
+
+    [HttpPut("{id}")]
+    public async Task<IActionResult> UpdateNotification(int id, [FromBody] TrainingNotification update)
+    {
+        var notification = await _context.TrainingNotifications.FindAsync(id);
+        if (notification == null) return NotFound();
+
+        if (notification.Status == NotificationStatus.Sent)
+            return BadRequest("Non è possibile modificare notifiche già inviate.");
+
+        notification.Subject = update.Subject;
+        notification.Body = update.Body;
+        notification.RecipientEmail = update.RecipientEmail;
+        
+        await _context.SaveChangesAsync();
+        return Ok(notification);
+    }
+
+    [HttpDelete("{id}")]
+    public async Task<IActionResult> DeleteNotification(int id)
+    {
+        var notification = await _context.TrainingNotifications.FindAsync(id);
+        if (notification == null) return NotFound();
+
+        _context.TrainingNotifications.Remove(notification);
+        await _context.SaveChangesAsync();
+        return NoContent();
+    }
+}

src/backend/Zentral.API/Modules/Training/Services/TrainingNotificationService.cs

@@ -0,0 +1,171 @@
+using Microsoft.EntityFrameworkCore;
+using System.Text.Json;
+using Zentral.Domain.Entities;
+using Zentral.Domain.Entities.Training;
+using Zentral.Infrastructure.Data;
+using Zentral.Domain.Interfaces;
+
+namespace Zentral.API.Modules.Training.Services;
+
+public class TrainingNotificationService
+{
+    private readonly ZentralDbContext _context;
+    private readonly IEmailSender _emailSender;
+    private readonly Zentral.API.Services.AppService _appService;
+
+    public TrainingNotificationService(ZentralDbContext context, IEmailSender emailSender, Zentral.API.Services.AppService appService)
+    {
+        _context = context;
+        _emailSender = emailSender;
+        _appService = appService;
+    }
+
+    public async Task<int> GenerateNotificationsAsync(int daysThreshold = 60)
+    {
+        var thresholdDate = DateTime.Today.AddDays(daysThreshold);
+        
+        // 1. Find Expiring or Expired records
+        var expiringRecords = await _context.TrainingRecords
+            .Include(t => t.ClienteContatto)
+            .ThenInclude(c => c.Cliente)
+            .Include(t => t.Articolo)
+            .Where(t => t.DataScadenza != null && t.DataScadenza <= thresholdDate) // Expired or Expiring soon
+            .Where(t => t.ClienteContatto.Cliente != null && t.ClienteContatto.Cliente.Attivo)
+            .ToListAsync();
+
+        // 2. Group by Client
+        var groupedByClient = expiringRecords.GroupBy(t => t.ClienteContatto.ClienteId);
+
+        int generatedCount = 0;
+
+        foreach (var group in groupedByClient)
+        {
+            var clienteId = group.Key;
+            var records = group.ToList();
+            var cliente = records.First().ClienteContatto.Cliente;
+
+            // 3. Check for existing PENDING notifications for this client
+            var existingNotification = await _context.TrainingNotifications
+                .FirstOrDefaultAsync(n => n.ClienteId == clienteId && n.Status == NotificationStatus.Pending);
+
+            if (existingNotification != null)
+            {
+                // Logic to update existing notification? 
+                // For now, let's assume we skip if pending exists to avoid confusion, 
+                // OR we could regenerate the body. Let's regenerate.
+                UpdateNotificationContent(existingNotification, cliente, records);
+            }
+            else
+            {
+                // Create new
+                var notification = new TrainingNotification
+                {
+                    ClienteId = clienteId,
+                    Status = NotificationStatus.Pending,
+                    ScheduledDate = DateTime.UtcNow
+                };
+                
+                UpdateNotificationContent(notification, cliente, records);
+                _context.TrainingNotifications.Add(notification);
+                generatedCount++;
+            }
+        }
+
+        await _context.SaveChangesAsync();
+        return generatedCount;
+    }
+
+    private void UpdateNotificationContent(TrainingNotification notification, Cliente cliente, List<TrainingRecord> records)
+    {
+        // Determine Recipient
+        // Priority: Contact with Role "Referente Formazione" -> Client Email -> First Contact Email
+        var referente = cliente.Contatti?.FirstOrDefault(c => c.Ruolo?.Contains("Referente", StringComparison.OrdinalIgnoreCase) == true);
+        notification.RecipientEmail = referente?.Email ?? cliente.Email ?? cliente.Contatti?.FirstOrDefault()?.Email ?? "";
+
+        if (string.IsNullOrEmpty(notification.RecipientEmail))
+        {
+             notification.ErrorMessage = "Nessuna email valida trovata per il cliente.";
+             notification.Status = NotificationStatus.Error; // Cannot send
+        }
+
+        // Subject
+        notification.Subject = $"Riepilogo Scadenze Formazione - {cliente.RagioneSociale}";
+
+        // Body Construction (HTML Table)
+        var body = $@"
+            <h3>Riepilogo Scadenze Formazione - {cliente.RagioneSociale}</h3>
+            <p>Gentile Referente,</p>
+            <p>Di seguito riportiamo l'elenco dei corsi di formazione in scadenza o scaduti per i vostri collaboratori:</p>
+            <table border='1' cellpadding='5' cellspacing='0' style='border-collapse: collapse; width: 100%;'>
+                <tr style='background-color: #f2f2f2;'>
+                    <th>Lavoratore</th>
+                    <th>Corso</th>
+                    <th>Data Esecuzione</th>
+                    <th>Scadenza</th>
+                    <th>Stato</th>
+                </tr>";
+
+        foreach (var rec in records.OrderBy(r => r.DataScadenza))
+        {
+            var style = rec.Stato == TrainingStatus.Expired ? "color: red; font-weight: bold;" : "color: orange;";
+            var statoText = rec.Stato == TrainingStatus.Expired ? "SCADUTO" : "In Scadenza";
+            
+            body += $@"
+                <tr>
+                    <td>{rec.ClienteContatto.Nome} {rec.ClienteContatto.Cognome}</td>
+                    <td>{rec.Articolo.Descrizione}</td>
+                    <td>{rec.DataEsecuzione:dd/MM/yyyy}</td>
+                    <td style='{style}'>{rec.DataScadenza:dd/MM/yyyy}</td>
+                    <td style='{style}'>{statoText}</td>
+                </tr>";
+        }
+
+        body += @"</table>
+            <p>Vi preghiamo di pianificare i rinnovi il prima possibile.</p>
+            <p>Cordiali saluti,<br>Ufficio Formazione</p>";
+
+        notification.Body = body;
+        
+        // Track IDs
+        notification.IncludedRecordIds = JsonSerializer.Serialize(records.Select(r => r.Id).ToList());
+    }
+
+    public async Task<int> SendApprovedNotificationsAsync()
+    {
+        if (!await _appService.IsAppEnabledAsync("communications"))
+            throw new InvalidOperationException("Modulo Comunicazioni non attivo.");
+
+        var toSend = await _context.TrainingNotifications
+            .Where(n => n.Status == NotificationStatus.Approved)
+            .ToListAsync();
+
+        int sentCount = 0;
+
+        foreach (var notif in toSend)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(notif.RecipientEmail))
+                {
+                    notif.Status = NotificationStatus.Error;
+                    notif.ErrorMessage = "Indirizzo email mancante.";
+                    continue;
+                }
+
+                await _emailSender.SendEmailAsync(notif.RecipientEmail, notif.Subject, notif.Body);
+                
+                notif.Status = NotificationStatus.Sent;
+                notif.SentDate = DateTime.UtcNow;
+                sentCount++;
+            }
+            catch (Exception ex)
+            {
+                notif.Status = NotificationStatus.Error;
+                notif.ErrorMessage = ex.Message;
+            }
+        }
+
+        await _context.SaveChangesAsync();
+        return sentCount;
+    }
+}

src/backend/Zentral.API/Program.cs

@@ -49,6 +49,9 @@ builder.Services.AddScoped<SalesService>();
 builder.Services.AddScoped<IProductionService, ProductionService>();
 builder.Services.AddScoped<IMrpService, MrpService>();
 
+// Training Module Services
+builder.Services.AddScoped<Zentral.API.Modules.Training.Services.TrainingNotificationService>();
+
 // Memory cache for module state
 builder.Services.AddMemoryCache();
 

src/backend/Zentral.API/Services/AppService.cs

@@ -535,6 +535,20 @@ public class AppService
                 RoutePath = "/communications",
                 IsAvailable = true,
                 CreatedAt = DateTime.UtcNow
+            },
+            new App
+            {
+                Code = "training",
+                Name = "Formazione",
+                Description = "Gestione formazione obbligatoria, corsi, scadenze e attestati",
+                Icon = "School",
+                BasePrice = 1400m,
+                MonthlyMultiplier = 1.2m,
+                SortOrder = 100,
+                IsCore = false,
+                RoutePath = "/training",
+                IsAvailable = true,
+                CreatedAt = DateTime.UtcNow
             }
         };
 

src/backend/Zentral.Domain/Entities/Articolo.cs

@@ -24,8 +24,21 @@ public class Articolo : BaseEntity
     public string? MimeType { get; set; }
     public string? Note { get; set; }
     public bool Attivo { get; set; } = true;
+    public int? GiorniValidita { get; set; }
+
+    /// <summary>
+    /// Classificazione specifica dell'articolo (Standard, Corso, Servizio)
+    /// </summary>
+    public TipoArticolo Tipo { get; set; } = TipoArticolo.Standard;
 
     public TipoMateriale? TipoMateriale { get; set; }
     public CodiceCategoria? Categoria { get; set; }
     public ICollection<EventoDettaglioPrelievo> DettagliPrelievo { get; set; } = new List<EventoDettaglioPrelievo>();
 }
+
+public enum TipoArticolo
+{
+    Standard = 0,
+    Corso = 1,
+    Servizio = 2
+}

src/backend/Zentral.Domain/Entities/Cliente.cs

@@ -28,4 +28,5 @@ public class Cliente : BaseEntity
 
     public ICollection<Evento> Eventi { get; set; } = new List<Evento>();
     public ICollection<Zentral.Domain.Entities.Sales.SalesOrder> SalesOrders { get; set; } = new List<Zentral.Domain.Entities.Sales.SalesOrder>();
+    public ICollection<ClienteContatto> Contatti { get; set; } = new List<ClienteContatto>();
 }

src/backend/Zentral.Domain/Entities/ClienteContatto.cs

@@ -0,0 +1,12 @@
+namespace Zentral.Domain.Entities;
+
+public class ClienteContatto : BaseEntity
+{
+    public string Nome { get; set; } = string.Empty;
+    public string Cognome { get; set; } = string.Empty;
+    public string? Email { get; set; }
+    public string? Ruolo { get; set; }
+    public string? Telefono { get; set; }
+    public int ClienteId { get; set; }
+    public Cliente Cliente { get; set; } = null!;
+}

src/backend/Zentral.Domain/Entities/Training/TrainingNotification.cs

@@ -0,0 +1,35 @@
+using System;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Zentral.Domain.Entities.Training;
+
+public enum NotificationStatus
+{
+    Pending,
+    Approved,
+    Sent,
+    Error
+}
+
+public class TrainingNotification : BaseEntity
+{
+    public int? ClienteId { get; set; } // Notifications are grouped by Client (Company)
+    public Cliente? Cliente { get; set; }
+
+    public string RecipientEmail { get; set; } = string.Empty;
+    public string Subject { get; set; } = string.Empty;
+    public string Body { get; set; } = string.Empty;
+
+    public DateTime ScheduledDate { get; set; }
+    public DateTime? SentDate { get; set; }
+    
+    // JSON array of TrainingRecord IDs included in this notification
+    public string IncludedRecordIds { get; set; } = "[]"; 
+
+    public NotificationStatus Status { get; set; } = NotificationStatus.Pending;
+    public string? ErrorMessage { get; set; }
+
+    // Optional: Link to specific TrainingRecords if needed for traceability, 
+    // but if it's a grouped email, maybe just a JSON list or text description in Body is enough.
+    // Let's keep it simple for now, the Body will contain the details.
+}

src/backend/Zentral.Domain/Entities/Training/TrainingRecord.cs

@@ -0,0 +1,39 @@
+using System;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Zentral.Domain.Entities.Training;
+
+public enum TrainingStatus
+{
+    Valid,
+    Expiring,
+    Expired
+}
+
+public class TrainingRecord : BaseEntity
+{
+    public int ClienteContattoId { get; set; }
+    public ClienteContatto ClienteContatto { get; set; } = null!;
+
+    public int ArticoloId { get; set; }
+    public Articolo Articolo { get; set; } = null!;
+
+    public DateTime DataEsecuzione { get; set; }
+    public DateTime? DataScadenza { get; set; }
+    
+    public string? AttestatoUrl { get; set; }
+    public string? Note { get; set; }
+
+    [NotMapped]
+    public TrainingStatus Stato 
+    { 
+        get 
+        {
+            if (!DataScadenza.HasValue) return TrainingStatus.Valid; 
+            var days = (DataScadenza.Value - DateTime.Today).TotalDays;
+            if (days < 0) return TrainingStatus.Expired;
+            if (days <= 30) return TrainingStatus.Expiring; // Configurable ideally
+            return TrainingStatus.Valid;
+        }
+    }
+}

src/backend/Zentral.Infrastructure/Data/DbSeeder.cs

@@ -7,7 +7,8 @@ public static class DbSeeder
 {
     public static void Seed(ZentralDbContext context)
     {
-        if (context.TipiPasto.Any()) return;
+        if (!context.TipiPasto.Any())
+        {
 
         // Tipi Pasto
         var tipiPasto = new List<TipoPasto>
@@ -72,7 +73,8 @@ public static class DbSeeder
             new() { Id = 1, Codice = "A", Descrizione = "Per Adulti", CoeffA = 1.0m, CoeffB = 0.5m, CoeffS = 1.0m },
             new() { Id = 2, Codice = "B", Descrizione = "Per Buffet", CoeffA = 0.8m, CoeffB = 1.0m, CoeffS = 0.8m },
             new() { Id = 3, Codice = "S", Descrizione = "Per Seduti", CoeffA = 1.0m, CoeffB = 0.6m, CoeffS = 1.0m },
-            new() { Id = 4, Codice = "U", Descrizione = "Universale", CoeffA = 1.0m, CoeffB = 1.0m, CoeffS = 1.0m }
+            new() { Id = 4, Codice = "U", Descrizione = "Universale", CoeffA = 1.0m, CoeffB = 1.0m, CoeffS = 1.0m },
+            new() { Id = 5, Codice = "TRAIN", Descrizione = "Formazione", CoeffA = 1.0m, CoeffB = 1.0m, CoeffS = 1.0m }
         };
         context.CodiciCategoria.AddRange(categorie);
 
@@ -230,7 +232,78 @@ public static class DbSeeder
             new() { Id = 4, Username = "operatore", Nome = "Operatore", Ruolo = "Operatore" }
         };
         context.Utenti.AddRange(utenti);
+            context.SaveChanges();
+        }
 
+        // Ensure TRAIN category exists
+        if (!context.CodiciCategoria.Any(c => c.Codice == "TRAIN"))
+        {
+            context.CodiciCategoria.Add(new CodiceCategoria
+            {
+                Codice = "TRAIN",
+                Descrizione = "Formazione",
+                CoeffA = 1.0m,
+                CoeffB = 1.0m,
+                CoeffS = 1.0m
+            });
+            context.SaveChanges();
+        }
+
+        // Apps
+        if (!context.Apps.Any())
+        {
+            var apps = new List<App>
+            {
+                new() { Code = "warehouse", Name = "Magazzino", Icon = "Warehouse", BasePrice = 100, RoutePath = "/warehouse", SortOrder = 10, Description = "Gestione completa del magazzino" },
+                new() { Code = "purchases", Name = "Acquisti", Icon = "ShoppingCart", BasePrice = 80, RoutePath = "/purchases", SortOrder = 20, Description = "Gestione ciclo passivo e fornitori" },
+                new() { Code = "sales", Name = "Vendite", Icon = "PointOfSale", BasePrice = 80, RoutePath = "/sales", SortOrder = 30, Description = "Gestione ciclo attivo e clienti" },
+                new() { Code = "production", Name = "Produzione", Icon = "Factory", BasePrice = 150, RoutePath = "/production", SortOrder = 40, Description = "Gestione della produzione e MRP" },
+                new() { Code = "events", Name = "Eventi", Icon = "Event", BasePrice = 120, RoutePath = "/events", SortOrder = 50, Description = "Gestione eventi e catering" },
+                new() { Code = "hr", Name = "Personale", Icon = "People", BasePrice = 60, RoutePath = "/hr", SortOrder = 60, Description = "Gestione risorse umane" },
+                new() { Code = "communications", Name = "Comunicazioni", Icon = "Email", BasePrice = 40, RoutePath = "/communications", SortOrder = 70, Description = "Gestione email e comunicazioni" },
+                new() { Code = "report-designer", Name = "Report Designer", Icon = "Print", BasePrice = 50, RoutePath = "/report-designer", SortOrder = 80, Description = "Editor di report personalizzati" },
+                new() { Code = "training", Name = "Formazione", Icon = "School", BasePrice = 50, RoutePath = "/training", SortOrder = 90, Description = "Gestione corsi e scadenze formazione" }
+            };
+            context.Apps.AddRange(apps);
+            context.SaveChanges();
+
+            // Auto-subscribe all for demo/dev
+            foreach (var app in apps)
+            {
+                context.AppSubscriptions.Add(new AppSubscription
+                {
+                    AppId = app.Id,
+                    IsEnabled = true,
+                    StartDate = DateTime.UtcNow,
+                    EndDate = DateTime.UtcNow.AddYears(1),
+                    SubscriptionType = SubscriptionType.Annual,
+                    AutoRenew = true,
+                    PaidPrice = app.BasePrice
+                });
+            }
+            context.SaveChanges();
+        }
+        else
+        {
+            // Ensure Training exists if apps already seeded
+            if (!context.Apps.Any(a => a.Code == "training"))
+            {
+                var trainingApp = new App { Code = "training", Name = "Formazione", Icon = "School", BasePrice = 50, RoutePath = "/training", SortOrder = 90, Description = "Gestione corsi e scadenze formazione" };
+                context.Apps.Add(trainingApp);
+                context.SaveChanges();
+                
+                context.AppSubscriptions.Add(new AppSubscription
+                {
+                    AppId = trainingApp.Id,
+                    IsEnabled = true,
+                    StartDate = DateTime.UtcNow,
+                    EndDate = DateTime.UtcNow.AddYears(1),
+                    SubscriptionType = SubscriptionType.Annual,
+                    AutoRenew = true,
+                    PaidPrice = trainingApp.BasePrice
+                });
                 context.SaveChanges();
             }
         }
+    }
+}

src/backend/Zentral.Infrastructure/Data/ZentralDbContext.cs

@@ -5,6 +5,7 @@ using Zentral.Domain.Entities.Sales;
 using Zentral.Domain.Entities.Production;
 using Zentral.Domain.Entities.HR;
 using Zentral.Domain.Entities.Communications;
+using Zentral.Domain.Entities.Training;
 using Microsoft.EntityFrameworkCore;
 
 namespace Zentral.Infrastructure.Data;
@@ -99,6 +100,11 @@ public class ZentralDbContext : DbContext
     // Communications module entities
     public DbSet<EmailLog> EmailLogs => Set<EmailLog>();
 
+    // Training module entities
+    public DbSet<ClienteContatto> Contatti => Set<ClienteContatto>();
+    public DbSet<TrainingRecord> TrainingRecords => Set<TrainingRecord>();
+    public DbSet<TrainingNotification> TrainingNotifications => Set<TrainingNotification>();
+
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
         base.OnModelCreating(modelBuilder);
@@ -393,6 +399,35 @@ public class ZentralDbContext : DbContext
             entity.HasIndex(e => e.EntityName);
         });
 
+
+
+        // ClienteContatto
+        modelBuilder.Entity<ClienteContatto>(entity =>
+        {
+            entity.ToTable("ClienteContatti");
+            
+            entity.HasOne(e => e.Cliente)
+                .WithMany(c => c.Contatti)
+                .HasForeignKey(e => e.ClienteId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        // TrainingRecord
+        modelBuilder.Entity<TrainingRecord>(entity =>
+        {
+            entity.ToTable("TrainingRecords");
+
+            entity.HasOne(e => e.ClienteContatto)
+                .WithMany()
+                .HasForeignKey(e => e.ClienteContattoId)
+                .OnDelete(DeleteBehavior.Cascade);
+
+            entity.HasOne(e => e.Articolo)
+                .WithMany()
+                .HasForeignKey(e => e.ArticoloId)
+                .OnDelete(DeleteBehavior.Restrict);
+        });
+
         // ===============================================
         // WAREHOUSE MODULE ENTITIES
         // ===============================================

src/backend/Zentral.Infrastructure/Migrations/20251212143625_AddTrainingModule.cs

@@ -0,0 +1,114 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Zentral.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddTrainingModule : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "GiorniValidita",
+                table: "Articoli",
+                type: "INTEGER",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "ClienteContatti",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    Nome = table.Column<string>(type: "TEXT", nullable: false),
+                    Cognome = table.Column<string>(type: "TEXT", nullable: false),
+                    Email = table.Column<string>(type: "TEXT", nullable: true),
+                    Ruolo = table.Column<string>(type: "TEXT", nullable: true),
+                    Telefono = table.Column<string>(type: "TEXT", nullable: true),
+                    ClienteId = table.Column<int>(type: "INTEGER", nullable: false),
+                    CreatedAt = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    CreatedBy = table.Column<string>(type: "TEXT", nullable: true),
+                    UpdatedAt = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    UpdatedBy = table.Column<string>(type: "TEXT", nullable: true),
+                    CustomFieldsJson = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ClienteContatti", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ClienteContatti_Clienti_ClienteId",
+                        column: x => x.ClienteId,
+                        principalTable: "Clienti",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "TrainingRecords",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    ClienteContattoId = table.Column<int>(type: "INTEGER", nullable: false),
+                    ArticoloId = table.Column<int>(type: "INTEGER", nullable: false),
+                    DataEsecuzione = table.Column<DateTime>(type: "TEXT", nullable: false),
+                    DataScadenza = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    AttestatoUrl = table.Column<string>(type: "TEXT", nullable: true),
+                    Note = table.Column<string>(type: "TEXT", nullable: true),
+                    CreatedAt = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    CreatedBy = table.Column<string>(type: "TEXT", nullable: true),
+                    UpdatedAt = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    UpdatedBy = table.Column<string>(type: "TEXT", nullable: true),
+                    CustomFieldsJson = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_TrainingRecords", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_TrainingRecords_Articoli_ArticoloId",
+                        column: x => x.ArticoloId,
+                        principalTable: "Articoli",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Restrict);
+                    table.ForeignKey(
+                        name: "FK_TrainingRecords_ClienteContatti_ClienteContattoId",
+                        column: x => x.ClienteContattoId,
+                        principalTable: "ClienteContatti",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ClienteContatti_ClienteId",
+                table: "ClienteContatti",
+                column: "ClienteId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_TrainingRecords_ArticoloId",
+                table: "TrainingRecords",
+                column: "ArticoloId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_TrainingRecords_ClienteContattoId",
+                table: "TrainingRecords",
+                column: "ClienteContattoId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "TrainingRecords");
+
+            migrationBuilder.DropTable(
+                name: "ClienteContatti");
+
+            migrationBuilder.DropColumn(
+                name: "GiorniValidita",
+                table: "Articoli");
+        }
+    }
+}

src/backend/Zentral.Infrastructure/Migrations/20251212170220_AddTipoArticolo.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Zentral.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddTipoArticolo : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "Tipo",
+                table: "Articoli",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Tipo",
+                table: "Articoli");
+        }
+    }
+}

src/backend/Zentral.Infrastructure/Migrations/20251213155224_AddTrainingNotifications.cs

@@ -0,0 +1,58 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Zentral.Infrastructure.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddTrainingNotifications : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "TrainingNotifications",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    ClienteId = table.Column<int>(type: "INTEGER", nullable: true),
+                    RecipientEmail = table.Column<string>(type: "TEXT", nullable: false),
+                    Subject = table.Column<string>(type: "TEXT", nullable: false),
+                    Body = table.Column<string>(type: "TEXT", nullable: false),
+                    ScheduledDate = table.Column<DateTime>(type: "TEXT", nullable: false),
+                    SentDate = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    IncludedRecordIds = table.Column<string>(type: "TEXT", nullable: false),
+                    Status = table.Column<int>(type: "INTEGER", nullable: false),
+                    ErrorMessage = table.Column<string>(type: "TEXT", nullable: true),
+                    CreatedAt = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    CreatedBy = table.Column<string>(type: "TEXT", nullable: true),
+                    UpdatedAt = table.Column<DateTime>(type: "TEXT", nullable: true),
+                    UpdatedBy = table.Column<string>(type: "TEXT", nullable: true),
+                    CustomFieldsJson = table.Column<string>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_TrainingNotifications", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_TrainingNotifications_Clienti_ClienteId",
+                        column: x => x.ClienteId,
+                        principalTable: "Clienti",
+                        principalColumn: "Id");
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_TrainingNotifications_ClienteId",
+                table: "TrainingNotifications",
+                column: "ClienteId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "TrainingNotifications");
+        }
+    }
+}

src/backend/Zentral.Infrastructure/Migrations/ZentralDbContextModelSnapshot.cs

@@ -174,6 +174,9 @@ namespace Zentral.Infrastructure.Migrations
                         .IsRequired()
                         .HasColumnType("TEXT");
 
+                    b.Property<int?>("GiorniValidita")
+                        .HasColumnType("INTEGER");
+
                     b.Property<byte[]>("Immagine")
                         .HasColumnType("BLOB");
 
@@ -195,6 +198,9 @@ namespace Zentral.Infrastructure.Migrations
                     b.Property<decimal?>("QtaStdS")
                         .HasColumnType("TEXT");
 
+                    b.Property<int>("Tipo")
+                        .HasColumnType("INTEGER");
+
                     b.Property<int?>("TipoMaterialeId")
                         .HasColumnType("INTEGER");
 
@@ -372,6 +378,54 @@ namespace Zentral.Infrastructure.Migrations
                     b.ToTable("Clienti");
                 });
 
+            modelBuilder.Entity("Zentral.Domain.Entities.ClienteContatto", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ClienteId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Cognome")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime?>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("CreatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("CustomFieldsJson")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Email")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Nome")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Ruolo")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Telefono")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("UpdatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClienteId");
+
+                    b.ToTable("ClienteContatti", (string)null);
+                });
+
             modelBuilder.Entity("Zentral.Domain.Entities.CodiceCategoria", b =>
                 {
                     b.Property<int>("Id")
@@ -2595,6 +2649,113 @@ namespace Zentral.Infrastructure.Migrations
                     b.ToTable("TipiRisorsa");
                 });
 
+            modelBuilder.Entity("Zentral.Domain.Entities.Training.TrainingNotification", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Body")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ClienteId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime?>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("CreatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("CustomFieldsJson")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ErrorMessage")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("IncludedRecordIds")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("RecipientEmail")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("ScheduledDate")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime?>("SentDate")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Subject")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("UpdatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ClienteId");
+
+                    b.ToTable("TrainingNotifications");
+                });
+
+            modelBuilder.Entity("Zentral.Domain.Entities.Training.TrainingRecord", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ArticoloId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AttestatoUrl")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("ClienteContattoId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime?>("CreatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("CreatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("CustomFieldsJson")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("DataEsecuzione")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime?>("DataScadenza")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Note")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime?>("UpdatedAt")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("UpdatedBy")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ArticoloId");
+
+                    b.HasIndex("ClienteContattoId");
+
+                    b.ToTable("TrainingRecords", (string)null);
+                });
+
             modelBuilder.Entity("Zentral.Domain.Entities.UserDashboardPreference", b =>
                 {
                     b.Property<int>("Id")
@@ -3924,6 +4085,17 @@ namespace Zentral.Infrastructure.Migrations
                     b.Navigation("TipoMateriale");
                 });
 
+            modelBuilder.Entity("Zentral.Domain.Entities.ClienteContatto", b =>
+                {
+                    b.HasOne("Zentral.Domain.Entities.Cliente", "Cliente")
+                        .WithMany("Contatti")
+                        .HasForeignKey("ClienteId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Cliente");
+                });
+
             modelBuilder.Entity("Zentral.Domain.Entities.Evento", b =>
                 {
                     b.HasOne("Zentral.Domain.Entities.Cliente", "Cliente")
@@ -4306,6 +4478,34 @@ namespace Zentral.Infrastructure.Migrations
                     b.Navigation("TipoPasto");
                 });
 
+            modelBuilder.Entity("Zentral.Domain.Entities.Training.TrainingNotification", b =>
+                {
+                    b.HasOne("Zentral.Domain.Entities.Cliente", "Cliente")
+                        .WithMany()
+                        .HasForeignKey("ClienteId");
+
+                    b.Navigation("Cliente");
+                });
+
+            modelBuilder.Entity("Zentral.Domain.Entities.Training.TrainingRecord", b =>
+                {
+                    b.HasOne("Zentral.Domain.Entities.Articolo", "Articolo")
+                        .WithMany()
+                        .HasForeignKey("ArticoloId")
+                        .OnDelete(DeleteBehavior.Restrict)
+                        .IsRequired();
+
+                    b.HasOne("Zentral.Domain.Entities.ClienteContatto", "ClienteContatto")
+                        .WithMany()
+                        .HasForeignKey("ClienteContattoId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Articolo");
+
+                    b.Navigation("ClienteContatto");
+                });
+
             modelBuilder.Entity("Zentral.Domain.Entities.UserDashboardPreference", b =>
                 {
                     b.HasOne("Zentral.Domain.Entities.Utente", "Utente")
@@ -4588,6 +4788,8 @@ namespace Zentral.Infrastructure.Migrations
 
             modelBuilder.Entity("Zentral.Domain.Entities.Cliente", b =>
                 {
+                    b.Navigation("Contatti");
+
                     b.Navigation("Eventi");
 
                     b.Navigation("SalesOrders");

src/frontend/public/locales/en/translation.json

@@ -322,6 +322,16 @@
       "pagamenti": "Payments",
       "rimborsi": "Reimbursements"
     },
+    "training": {
+      "title": "Training Management",
+      "dashboard": "Dashboard",
+      "matrix": "Matrix",
+      "registry": "Course Registry",
+      "workers": "Workers",
+      "deadlines": "Deadlines",
+      "notifications": "Notifications",
+      "dataExchange": "Import/Export"
+    },
     "admin": {
       "title": "App Management",
       "subtitle": "Configure active apps and manage subscriptions",
@@ -422,6 +432,14 @@
         "4": "Expense reports and reimbursements",
         "5": "Personnel cost analysis"
       },
+      "training": {
+        "0": "Course registry management",
+        "1": "Participant registry",
+        "2": "Expiry and renewal monitoring",
+        "3": "Certificate archiving",
+        "4": "Competence matrix",
+        "5": "Automatic expiry notifications"
+      },
       "default": "Complete app features"
     }
   },

src/frontend/public/locales/it/translation.json

@@ -30,7 +30,8 @@
     "preview": "Anteprima",
     "none": "Nessuno",
     "view": "Dettaglio",
-    "copy": "Copia"
+    "copy": "Copia",
+    "category": "Categoria"
   },
   "menu": {
     "dashboard": "Dashboard",
@@ -62,7 +63,8 @@
     "movements": "Movimenti",
     "stock": "Giacenze",
     "inventory": "Inventario",
-    "categories": "Categorie"
+    "categories": "Categorie",
+    "training": "Formazione"
   },
   "navigation": {
     "searchPlaceholder": "Cerca...",
@@ -209,6 +211,10 @@
     "pec": "PEC",
     "fiscalCode": "Codice Fiscale",
     "recipientCode": "Codice Destinatario",
+    "contacts": "Contatti",
+    "newContact": "Nuovo Contatto",
+    "editContact": "Modifica Contatto",
+    "role": "Ruolo",
     "generatedOnSave": "(Generato al salvataggio)",
     "autoGenerated": "Generato automaticamente",
     "willBeAssigned": "Verrà assegnato automaticamente",
@@ -318,6 +324,16 @@
       "pagamenti": "Pagamenti",
       "rimborsi": "Rimborsi"
     },
+    "training": {
+      "title": "Gestione Formazione",
+      "dashboard": "Dashboard",
+      "matrix": "Matrice",
+      "registry": "Anagrafica Corsi",
+      "workers": "Lavoratori",
+      "deadlines": "Scadenze",
+      "notifications": "Notifiche",
+      "dataExchange": "Import/Export"
+    },
     "admin": {
       "title": "Gestione Applicazioni",
       "subtitle": "Configura le applicazioni attive e gestisci le subscription",
@@ -419,6 +435,14 @@
         "4": "Note spese e rimborsi",
         "5": "Analisi costi personale"
       },
+      "training": {
+        "0": "Gestione anagrafica corsi",
+        "1": "Registro partecipanti",
+        "2": "Monitoraggio scadenze e rinnovi",
+        "3": "Archiviazione attestati",
+        "4": "Matrice competenze",
+        "5": "Notifiche automatiche scadenze"
+      },
       "default": "Funzionalità complete dell'applicazione"
     }
   },
@@ -1706,5 +1730,32 @@
         "error": "Errore"
       }
     }
+  },
+  "training": {
+    "title": "Formazione",
+    "dashboard": "Dashboard",
+    "courses": "Corsi",
+    "registry": "Anagrafica Corsi",
+    "matrix": "Matrice Formazione",
+    "expiring": "In Scadenza",
+    "expired": "Scaduti",
+    "valid": "Valido",
+    "validityDays": "Giorni Validità",
+    "newTraining": "Nuova Formazione",
+    "recordDate": "Data Corso",
+    "expirationDate": "Data Scadenza",
+    "certificate": "Attestato",
+    "upload": "Carica",
+    "download": "Scarica",
+    "status": "Stato",
+    "participant": "Partecipante",
+    "course": "Corso",
+    "deleteConfirm": "Eliminare questa formazione?",
+    "daysRemaining": "Giorni rimanenti",
+    "expiringIn": "Scade tra {{days}} giorni",
+    "sendNotification": "Invia Notifica",
+    "notificationSent": "Notifica inviata con successo",
+    "editCourse": "Modifica Corso",
+    "editTraining": "Modifica Formazione"
   }
 }

src/frontend/src/App.tsx

@@ -20,6 +20,7 @@ import ProductionRoutes from "./apps/production/routes";
 import EventsRoutes from "./apps/events/routes";
 import HRRoutes from "./apps/hr/routes";
 import CommunicationsRoutes from "./apps/communications/routes";
+import TrainingRoutes from "./apps/training/routes";
 import { AppGuard } from "./components/AppGuard";
 import { useRealTimeUpdates } from "./hooks/useRealTimeUpdates";
 import { CollaborationProvider } from "./contexts/CollaborationContext";
@@ -150,6 +151,15 @@ function App() {
                             </AppGuard>
                           }
                         />
+                        {/* Training Module */}
+                        <Route
+                          path="training/*"
+                          element={
+                            <AppGuard appCode="training">
+                              <TrainingRoutes />
+                            </AppGuard>
+                          }
+                        />
                       </Route>
                     </Routes>
                   </TabProvider>

src/frontend/src/apps/sales/pages/ClientiPage.tsx

@@ -11,7 +11,8 @@ import {
   DialogContent,
   DialogActions,
   TextField,
-
+  Tabs,
+  Tab,
 } from "@mui/material";
 import { DataGrid, GridColDef } from "@mui/x-data-grid";
 import {
@@ -21,10 +22,167 @@ import {
 } from "@mui/icons-material";
 import { useTranslation } from "react-i18next";
 import { clientiService } from "../../../services/lookupService";
-import { Cliente } from "../../../types";
+import { Cliente, ClienteContatto } from "../../../types";
 import { CustomFieldsRenderer } from "../../../components/customFields/CustomFieldsRenderer";
 import { CustomFieldValues } from "../../../types/customFields";
 
+function ContactsManager({ clienteId }: { clienteId: number }) {
+  const { t } = useTranslation();
+  const queryClient = useQueryClient();
+  const [openDialog, setOpenDialog] = useState(false);
+  const [editingId, setEditingId] = useState<number | null>(null);
+  const [formData, setFormData] = useState<Partial<ClienteContatto>>({});
+
+  const { data: contatti = [], isLoading } = useQuery({
+    queryKey: ["clienti", clienteId, "contatti"],
+    queryFn: () => clientiService.getContatti(clienteId),
+  });
+
+  const createMutation = useMutation({
+    mutationFn: (data: Partial<ClienteContatto>) =>
+      clientiService.createContatto(clienteId, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["clienti", clienteId, "contatti"] });
+      handleCloseDialog();
+    },
+  });
+
+  const updateMutation = useMutation({
+    mutationFn: ({ id, data }: { id: number; data: Partial<ClienteContatto> }) =>
+      clientiService.updateContatto(clienteId, id, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["clienti", clienteId, "contatti"] });
+      handleCloseDialog();
+    },
+  });
+
+  const deleteMutation = useMutation({
+    mutationFn: (id: number) => clientiService.deleteContatto(clienteId, id),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["clienti", clienteId, "contatti"] });
+    },
+  });
+
+  const handleCloseDialog = () => {
+    setOpenDialog(false);
+    setEditingId(null);
+    setFormData({});
+  };
+
+  const handleEdit = (contatto: ClienteContatto) => {
+    setFormData(contatto);
+    setEditingId(contatto.id);
+    setOpenDialog(true);
+  };
+
+  const handleSubmit = () => {
+    if (editingId) {
+      updateMutation.mutate({ id: editingId, data: formData });
+    } else {
+      createMutation.mutate({ ...formData, clienteId });
+    }
+  };
+
+  const columns: GridColDef[] = [
+    { field: "nome", headerName: t("common.name"), flex: 1 },
+    { field: "cognome", headerName: t("common.surname"), flex: 1 },
+    { field: "ruolo", headerName: t("clients.role"), flex: 1 },
+    { field: "email", headerName: t("clients.email"), flex: 1 },
+    { field: "telefono", headerName: t("clients.phone"), flex: 1 },
+    {
+      field: "actions",
+      headerName: t("common.actions"),
+      width: 120,
+      renderCell: (params) => (
+        <Box>
+          <IconButton size="small" onClick={() => handleEdit(params.row)}>
+            <EditIcon />
+          </IconButton>
+          <IconButton
+            size="small"
+            color="error"
+            onClick={() => {
+              if (confirm(t("common.deleteConfirm"))) {
+                deleteMutation.mutate(params.row.id);
+              }
+            }}
+          >
+            <DeleteIcon />
+          </IconButton>
+        </Box>
+      ),
+    },
+  ];
+
+  return (
+    <Box>
+      <Box display="flex" justifyContent="flex-end" mb={2}>
+        <Button startIcon={<AddIcon />} variant="contained" onClick={() => setOpenDialog(true)}>
+          {t("clients.newContact")}
+        </Button>
+      </Box>
+      <Paper sx={{ height: 400, width: "100%" }}>
+        <DataGrid
+          rows={contatti}
+          columns={columns}
+          loading={isLoading}
+          pageSizeOptions={[10, 25]}
+          initialState={{ pagination: { paginationModel: { pageSize: 10 } } }}
+          disableRowSelectionOnClick
+        />
+      </Paper>
+
+      <Dialog open={openDialog} onClose={handleCloseDialog} maxWidth="sm" fullWidth>
+        <DialogTitle>
+          {editingId ? t("clients.editContact") : t("clients.newContact")}
+        </DialogTitle>
+        <DialogContent>
+          <Box display="flex" flexDirection="column" gap={2} mt={1}>
+            <TextField
+              label={t("common.name")}
+              value={formData.nome || ""}
+              onChange={(e) => setFormData({ ...formData, nome: e.target.value })}
+              fullWidth
+              required
+            />
+            <TextField
+              label={t("common.surname")}
+              value={formData.cognome || ""}
+              onChange={(e) => setFormData({ ...formData, cognome: e.target.value })}
+              fullWidth
+              required
+            />
+            <TextField
+              label={t("clients.role")}
+              value={formData.ruolo || ""}
+              onChange={(e) => setFormData({ ...formData, ruolo: e.target.value })}
+              fullWidth
+            />
+            <TextField
+              label={t("clients.email")}
+              value={formData.email || ""}
+              onChange={(e) => setFormData({ ...formData, email: e.target.value })}
+              fullWidth
+            />
+            <TextField
+              label={t("clients.phone")}
+              value={formData.telefono || ""}
+              onChange={(e) => setFormData({ ...formData, telefono: e.target.value })}
+              fullWidth
+            />
+          </Box>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={handleCloseDialog}>{t("common.cancel")}</Button>
+          <Button variant="contained" onClick={handleSubmit}>
+            {t("common.save")}
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </Box>
+  );
+}
+
 export default function ClientiPage() {
   const queryClient = useQueryClient();
   const { t } = useTranslation();
@@ -32,6 +190,7 @@ export default function ClientiPage() {
   const [editingId, setEditingId] = useState<number | null>(null);
   const [formData, setFormData] = useState<Partial<Cliente>>({ attivo: true });
   const [customFields, setCustomFields] = useState<CustomFieldValues>({});
+  const [tabValue, setTabValue] = useState(0);
 
   const { data: clienti = [], isLoading } = useQuery({
     queryKey: ["clienti"],
@@ -65,6 +224,7 @@ export default function ClientiPage() {
     setEditingId(null);
     setFormData({ attivo: true });
     setCustomFields({});
+    setTabValue(0);
   };
 
   const handleEdit = (cliente: Cliente) => {
@@ -85,11 +245,9 @@ export default function ClientiPage() {
     };
 
     if (editingId) {
-      // In modifica, non inviamo il codice (non modificabile)
       const { codice: _codice, ...updateData } = dataWithCustomFields;
       updateMutation.mutate({ id: editingId, data: updateData });
     } else {
-      // In creazione, non inviamo il codice (generato automaticamente)
       const { codice: _codice, ...createData } = dataWithCustomFields;
       createMutation.mutate(createData);
     }
@@ -178,7 +336,15 @@ export default function ClientiPage() {
           {editingId ? t("clients.editClient") : t("clients.newClient")}
         </DialogTitle>
         <DialogContent>
+          <Tabs value={tabValue} onChange={(_, v) => setTabValue(v)} sx={{ mb: 2, borderBottom: 1, borderColor: "divider" }}>
+            <Tab label={t("common.details")} />
+            <Tab label={t("clients.contacts")} disabled={!editingId} />
+          </Tabs>
+
+          <Box role="tabpanel" hidden={tabValue !== 0}>
+            {tabValue === 0 && (
               <Box display="flex" flexWrap="wrap" gap={2} mt={1}>
+                {/* EXISTING FIELDS */}
                 <Box flexBasis={{ xs: '100%', md: '23%' }} flexGrow={1}>
                   <TextField
                     label={t("clients.code")}
@@ -358,12 +524,21 @@ export default function ClientiPage() {
                   />
                 </Box>
               </Box>
+            )}
+          </Box>
+
+          <Box role="tabpanel" hidden={tabValue !== 1}>
+            {tabValue === 1 && editingId && <ContactsManager clienteId={editingId} />}
+          </Box>
+
         </DialogContent>
         <DialogActions>
-          <Button onClick={handleCloseDialog}>{t("common.cancel")}</Button>
+          <Button onClick={handleCloseDialog}>{t("common.close")}</Button>
+          {tabValue === 0 && (
             <Button variant="contained" onClick={handleSubmit}>
               {editingId ? t("common.save") : t("common.create")}
             </Button>
+          )}
         </DialogActions>
       </Dialog>
     </Box>

src/frontend/src/apps/training/components/TrainingLayout.tsx

@@ -0,0 +1,13 @@
+import { Outlet } from "react-router-dom";
+import { Box } from "@mui/material";
+
+export default function TrainingLayout() {
+  return (
+    <Box sx={{ display: "flex", flexDirection: "column", height: "100%", p: 2 }}>
+      <Box sx={{ flex: 1, overflow: "hidden" }}>
+        <Outlet />
+      </Box>
+    </Box>
+  );
+}
+

src/frontend/src/apps/training/pages/DashboardPage.tsx

@@ -0,0 +1,112 @@
+import { useQuery, useMutation } from "@tanstack/react-query";
+import {
+  Box,
+  Typography,
+  Card,
+  CardContent,
+  Chip,
+  Paper,
+  Grid,
+  IconButton,
+  Tooltip
+} from "@mui/material";
+import { Send as SendIcon } from "@mui/icons-material";
+import { DataGrid, GridColDef } from "@mui/x-data-grid";
+import { useTranslation } from "react-i18next";
+import { trainingService } from "../services/trainingService";
+
+export default function DashboardPage() {
+  const { t } = useTranslation();
+
+  const { data: expiringRecords = [], isLoading } = useQuery({
+    queryKey: ["training", "expiring"],
+    queryFn: () => trainingService.getExpiring(),
+  });
+
+  const notifyMutation = useMutation({
+    mutationFn: (id: number) => trainingService.sendNotification(id),
+    onSuccess: () => {
+      alert(t("training.notificationSent"));
+    }
+  });
+
+  const expiredCount = expiringRecords.filter((r: any) => r.stato === 2).length;
+  const expiringCount = expiringRecords.filter((r: any) => r.stato === 1).length;
+
+  const columns: GridColDef[] = [
+    { field: "dataScadenza", headerName: t("training.expirationDate"), width: 120, valueFormatter: (params: any) => new Date(params.value).toLocaleDateString() },
+    { field: "course", headerName: t("training.course"), width: 200, valueGetter: (params: any) => params.row.articolo?.descrizione },
+    { field: "participant", headerName: t("training.participant"), width: 200, valueGetter: (params: any) => `${params.row.clienteContatto?.cognome} ${params.row.clienteContatto?.nome}` },
+    {
+      field: "stato",
+      headerName: t("training.status"),
+      width: 120,
+      renderCell: (params: any) => (
+        params.row.stato === 2
+          ? <Chip label={t("training.expired")} color="error" size="small" />
+          : <Chip label={t("training.expiring")} color="warning" size="small" />
+      )
+    },
+    {
+      field: "actions",
+      headerName: t("common.actions"),
+      width: 100,
+      renderCell: (params: any) => (
+        <Tooltip title={t("training.sendNotification")}>
+          <IconButton
+            size="small"
+            color="primary"
+            onClick={() => notifyMutation.mutate(params.row.id)}
+          >
+            <SendIcon />
+          </IconButton>
+        </Tooltip>
+      )
+    }
+  ];
+
+  return (
+    <Box p={2}>
+      <Typography variant="h4" mb={3}>{t("training.dashboard")}</Typography>
+
+      <Grid container spacing={3} mb={4}>
+        <Grid size={{ xs: 12, md: 6 }}>
+          <Card>
+            <CardContent>
+              <Typography color="textSecondary" gutterBottom>
+                {t("training.expired")}
+              </Typography>
+              <Typography variant="h3" color="error">
+                {expiredCount}
+              </Typography>
+            </CardContent>
+          </Card>
+        </Grid>
+        <Grid size={{ xs: 12, md: 6 }}>
+          <Card>
+            <CardContent>
+              <Typography color="textSecondary" gutterBottom>
+                {t("training.expiring")}
+              </Typography>
+              <Typography variant="h3" color="warning.main">
+                {expiringCount}
+              </Typography>
+            </CardContent>
+          </Card>
+        </Grid>
+      </Grid>
+
+      <Typography variant="h5" mb={2}>{t("training.expiring")}</Typography>
+      <Paper sx={{ height: 400, width: "100%" }}>
+        <DataGrid
+          rows={expiringRecords}
+          columns={columns}
+          loading={isLoading}
+          pageSizeOptions={[5, 10]}
+          initialState={{ pagination: { paginationModel: { pageSize: 5 } } }}
+          disableRowSelectionOnClick
+        />
+      </Paper>
+    </Box>
+  );
+}

src/frontend/src/apps/training/pages/DataExchangePage.tsx

@@ -0,0 +1,46 @@
+import React from 'react';
+import { Box, Paper, Typography, Button, Stack } from '@mui/material';
+import { CloudUpload as UploadIcon, Download as DownloadIcon } from '@mui/icons-material';
+
+const DataExchangePage: React.FC = () => {
+  // Placeholder - Fully implementing Excel import frontend needs file uploader and backend support
+  // For now we setup the structure.
+
+  const handleImport = () => {
+    alert("Import functionality to be implemented. Please use Import Template.");
+  };
+
+  const handleExportElearning = () => {
+    alert("Export functionality to be implemented.");
+  };
+
+  return (
+    <Box sx={{ p: 3 }}>
+      <Typography variant="h4" gutterBottom>Import / Export Dati</Typography>
+
+      <Stack spacing={3} mt={4}>
+        <Paper sx={{ p: 3 }}>
+          <Typography variant="h6" gutterBottom>Importazione Storico (Excel)</Typography>
+          <Typography variant="body2" color="text.secondary" paragraph>
+            Carica un file Excel con lo storico delle formazioni. Assicurati di usare il template corretto.
+          </Typography>
+          <Button variant="contained" startIcon={<UploadIcon />} onClick={handleImport}>
+            Carica File Excel
+          </Button>
+        </Paper>
+
+        <Paper sx={{ p: 3 }}>
+          <Typography variant="h6" gutterBottom>Esportazione E-Learning</Typography>
+          <Typography variant="body2" color="text.secondary" paragraph>
+            Esporta l'anagrafica lavoratori in formato compatibile con piattaforme E-learning esterne (CSV/XLS).
+          </Typography>
+          <Button variant="outlined" startIcon={<DownloadIcon />} onClick={handleExportElearning}>
+            Esporta Anagrafiche
+          </Button>
+        </Paper>
+      </Stack>
+    </Box>
+  );
+};
+
+export default DataExchangePage;

src/frontend/src/apps/training/pages/MatrixPage.tsx

@@ -0,0 +1,319 @@
+import { useState } from "react";
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import {
+  Box,
+  Typography,
+  Button,
+  Paper,
+  IconButton,
+  Dialog,
+  DialogTitle,
+  DialogContent,
+  DialogActions,
+  TextField,
+  MenuItem,
+  Chip,
+} from "@mui/material";
+import { DataGrid, GridColDef } from "@mui/x-data-grid";
+import {
+  Add as AddIcon,
+  Edit as EditIcon,
+  Delete as DeleteIcon,
+  UploadFile as UploadIcon,
+  Description as DescriptionIcon,
+} from "@mui/icons-material";
+import { useTranslation } from "react-i18next";
+import { trainingService } from "../services/trainingService";
+import { TrainingRecord, ClienteContatto, Articolo, TipoArticolo } from "../../../types";
+import { lookupService, articoliService, clientiService } from "../../../services/lookupService";
+
+export default function MatrixPage() {
+  const { t } = useTranslation();
+  const queryClient = useQueryClient();
+  const [openDialog, setOpenDialog] = useState(false);
+  const [editingId, setEditingId] = useState<number | null>(null);
+  const [formData, setFormData] = useState<Partial<TrainingRecord>>({});
+  const [selectedClient, setSelectedClient] = useState<number | null>(null);
+  const [fileToUpload, setFileToUpload] = useState<File | null>(null);
+
+  // Queries
+  const { data: records = [], isLoading } = useQuery({
+    queryKey: ["training", "records"],
+    queryFn: () => trainingService.getAll(),
+  });
+
+  const { data: customers = [] } = useQuery({
+    queryKey: ["lookup", "customers"],
+    queryFn: () => lookupService.getClienti(),
+  });
+
+  /* Removed unused trainingCategoryId logic */
+  const { data: courses = [] } = useQuery({
+    queryKey: ["articles", "training"],
+    queryFn: () => articoliService.getAll({ tipo: TipoArticolo.Corso }),
+  });
+
+  const { data: contacts = [] } = useQuery({
+    queryKey: ["contacts", selectedClient],
+    queryFn: () => selectedClient ? clientiService.getContatti(selectedClient) : [],
+    enabled: !!selectedClient,
+  });
+
+  // Mutations
+  const createMutation = useMutation({
+    mutationFn: async (data: Partial<TrainingRecord>) => {
+      const result = await trainingService.create(data);
+      if (fileToUpload) {
+        await trainingService.uploadCertificate(result.id, fileToUpload);
+      }
+      return result;
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["training", "records"] });
+      handleCloseDialog();
+    },
+  });
+
+  const updateMutation = useMutation({
+    mutationFn: async ({ id, data }: { id: number; data: Partial<TrainingRecord> }) => {
+      await trainingService.update(id, data);
+      if (fileToUpload) {
+        await trainingService.uploadCertificate(id, fileToUpload);
+      }
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["training", "records"] });
+      handleCloseDialog();
+    },
+  });
+
+  const deleteMutation = useMutation({
+    mutationFn: (id: number) => trainingService.delete(id),
+    onSuccess: () => queryClient.invalidateQueries({ queryKey: ["training", "records"] }),
+  });
+
+  const handleCloseDialog = () => {
+    setOpenDialog(false);
+    setEditingId(null);
+    setFormData({});
+    setSelectedClient(null);
+    setFileToUpload(null);
+  };
+
+  const handleEdit = (record: TrainingRecord) => {
+    setFormData(record);
+    setEditingId(record.id);
+
+    // Reverse lookup client from contact if possible?
+    // Not directly available in record unless included.
+    // Record has ClientContatto -> which has ClienteId (if included by backend).
+    // Assuming backend includes ClienteContatto.
+    if (record.clienteContatto) {
+      setSelectedClient(record.clienteContatto.clienteId);
+    }
+
+    setOpenDialog(true);
+  };
+
+  const handleSubmit = () => {
+    if (editingId) {
+      updateMutation.mutate({ id: editingId, data: formData });
+    } else {
+      createMutation.mutate(formData);
+    }
+  };
+
+  const getStatusChip = (status?: number) => {
+    if (status === 2) return <Chip label={t("training.expired")} color="error" size="small" />;
+    if (status === 1) return <Chip label={t("training.expiring")} color="warning" size="small" />;
+    return <Chip label={t("training.valid")} color="success" size="small" />;
+  };
+
+  const columns: GridColDef[] = [
+    {
+      field: "dataEsecuzione",
+      headerName: t("training.recordDate"),
+      width: 110,
+      valueFormatter: (params: any) => params.value ? new Date(params.value).toLocaleDateString() : ""
+    },
+    {
+      field: "dataScadenza",
+      headerName: t("training.expirationDate"),
+      width: 110,
+      valueFormatter: (params: any) => params.value ? new Date(params.value).toLocaleDateString() : ""
+    },
+    {
+      field: "articolo",
+      headerName: t("training.course"),
+      width: 200,
+      valueGetter: (params: any) => params.row.articolo?.descrizione || ""
+    },
+    {
+      field: "clienteContatto",
+      headerName: t("training.participant"),
+      width: 200,
+      valueGetter: (params: any) => {
+        const c = params.row.clienteContatto;
+        return c ? `${c.cognome} ${c.nome}` : "";
+      }
+    },
+    {
+      field: "stato",
+      headerName: t("training.status"),
+      width: 120,
+      renderCell: (params: any) => getStatusChip(params.row.stato)
+    },
+    {
+      field: "attestatoUrl",
+      headerName: t("training.certificate"),
+      width: 100,
+      renderCell: (params: any) => params.value ? (
+        <IconButton
+          size="small"
+          color="primary"
+          href={`/api/training/${params.row.id}/attestato`}
+          target="_blank"
+        >
+          <DescriptionIcon />
+        </IconButton>
+      ) : null
+    },
+    {
+      field: "actions",
+      headerName: t("common.actions"),
+      width: 120,
+      renderCell: (params: any) => (
+        <Box>
+          <IconButton size="small" onClick={() => handleEdit(params.row)}>
+            <EditIcon />
+          </IconButton>
+          <IconButton
+            size="small"
+            color="error"
+            onClick={() => {
+              if (confirm(t("common.deleteConfirm"))) {
+                deleteMutation.mutate(params.row.id);
+              }
+            }}
+          >
+            <DeleteIcon />
+          </IconButton>
+        </Box>
+      ),
+    },
+  ];
+
+  return (
+    <Box p={2}>
+      <Box display="flex" justifyContent="space-between" alignItems="center" mb={2}>
+        <Typography variant="h4">{t("training.matrix")}</Typography>
+        <Button
+          variant="contained"
+          startIcon={<AddIcon />}
+          onClick={() => setOpenDialog(true)}
+        >
+          {t("training.newTraining")}
+        </Button>
+      </Box>
+
+      <Paper sx={{ height: 600, width: "100%" }}>
+        <DataGrid
+          rows={records}
+          columns={columns}
+          loading={isLoading}
+          pageSizeOptions={[10, 25]}
+          initialState={{ pagination: { paginationModel: { pageSize: 25 } } }}
+          disableRowSelectionOnClick
+        />
+      </Paper>
+
+      <Dialog open={openDialog} onClose={handleCloseDialog} maxWidth="md" fullWidth>
+        <DialogTitle>
+          {editingId ? t("training.editTraining") : t("training.newTraining")}
+        </DialogTitle>
+        <DialogContent>
+          <Box display="flex" flexDirection="column" gap={2} mt={1}>
+            <TextField
+              select
+              label={t("clients.businessName")} // Using client label?
+              value={selectedClient || ""}
+              onChange={(e) => setSelectedClient(Number(e.target.value))}
+              fullWidth
+              disabled={!!editingId} // Locked on edit if complex to change
+            >
+              {customers.map((c: any) => (
+                <MenuItem key={c.id} value={c.id}>{c.ragioneSociale}</MenuItem>
+              ))}
+            </TextField>
+
+            <TextField
+              select
+              label={t("training.participant")}
+              value={formData.clienteContattoId || ""}
+              onChange={(e) => setFormData({ ...formData, clienteContattoId: Number(e.target.value) })}
+              fullWidth
+              required
+              disabled={!selectedClient}
+            >
+              {contacts.map((c: ClienteContatto) => (
+                <MenuItem key={c.id} value={c.id}>{c.cognome} {c.nome}</MenuItem>
+              ))}
+            </TextField>
+
+            <TextField
+              select
+              label={t("training.course")}
+              value={formData.articoloId || ""}
+              onChange={(e) => setFormData({ ...formData, articoloId: Number(e.target.value) })}
+              fullWidth
+              required
+            >
+              {courses.map((c: Articolo) => (
+                <MenuItem key={c.id} value={c.id}>{c.descrizione}</MenuItem>
+              ))}
+            </TextField>
+
+            <TextField
+              type="date"
+              label={t("training.recordDate")}
+              value={formData.dataEsecuzione ? formData.dataEsecuzione.split('T')[0] : ""}
+              onChange={(e) => setFormData({ ...formData, dataEsecuzione: e.target.value })}
+              fullWidth
+              required
+              InputLabelProps={{ shrink: true }}
+            />
+
+            <Button
+              variant="outlined"
+              component="label"
+              startIcon={<UploadIcon />}
+            >
+              {t("training.upload")}
+              <input
+                type="file"
+                hidden
+                onChange={(e) => setFileToUpload(e.target.files?.[0] || null)}
+              />
+            </Button>
+            {fileToUpload && <Typography variant="caption">{fileToUpload.name}</Typography>}
+
+            <TextField
+              label={t("common.notes")}
+              multiline
+              rows={3}
+              value={formData.note || ""}
+              onChange={(e) => setFormData({ ...formData, note: e.target.value })}
+              fullWidth
+            />
+          </Box>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={handleCloseDialog}>{t("common.cancel")}</Button>
+          <Button variant="contained" onClick={handleSubmit}>
+            {t("common.save")}
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </Box>
+  );
+}

src/frontend/src/apps/training/pages/NotificationCenterPage.tsx

@@ -0,0 +1,222 @@
+import React, { useState, useEffect } from 'react';
+import {
+  Box,
+  Paper,
+  Typography,
+  Button,
+  List,
+  ListItem,
+  ListItemText,
+  ListItemSecondaryAction,
+  IconButton,
+  Chip,
+  Stack,
+  Dialog,
+  DialogTitle,
+  DialogContent,
+  DialogActions,
+  TextField,
+  Divider
+} from '@mui/material';
+import {
+  CheckCircle as ApproveIcon,
+  Edit as EditIcon,
+  Delete as DeleteIcon,
+  Send as SendIcon,
+  Add as GenerateIcon
+} from '@mui/icons-material';
+import api from '../../../services/api';
+
+const NotificationCenterPage: React.FC = () => {
+  const [notifications, setNotifications] = useState<any[]>([]);
+  const [generating, setGenerating] = useState(false);
+
+  // Edit Dialog
+  const [editOpen, setEditOpen] = useState(false);
+  const [editingNotif, setEditingNotif] = useState<any>(null);
+
+  const fetchNotifications = async () => {
+    try {
+      const res = await api.get('/training/notifications');
+      setNotifications(res.data);
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  useEffect(() => {
+    fetchNotifications();
+  }, []);
+
+  const handleGenerate = async () => {
+    setGenerating(true);
+    try {
+      await api.post('/training/notifications/generate?days=60');
+      fetchNotifications();
+    } catch (e) {
+      alert('Errore generazione notifiche');
+    } finally {
+      setGenerating(false);
+    }
+  };
+
+  const handleApprove = async (id: number) => {
+    try {
+      await api.post(`/training/notifications/${id}/approve`);
+      fetchNotifications();
+    } catch (e) {
+      console.error(e);
+    }
+  };
+
+  const handleSend = async () => {
+    try {
+      const res = await api.post('/training/notifications/send');
+      alert(res.data.message);
+      fetchNotifications();
+    } catch (e) {
+      console.error(e);
+      alert('Errore invio');
+    }
+  };
+
+  const handleEdit = (notif: any) => {
+    setEditingNotif({ ...notif });
+    setEditOpen(true);
+  };
+
+  const handleSaveEdit = async () => {
+    try {
+      await api.put(`/training/notifications/${editingNotif.id}`, editingNotif);
+      setEditOpen(false);
+      fetchNotifications();
+    } catch (e) {
+      alert('Errore salvataggio');
+    }
+  };
+
+  const handleDelete = async (id: number) => {
+    if (!window.confirm('Cancellare questa notifica?')) return;
+    try {
+      await api.delete(`/training/notifications/${id}`);
+      fetchNotifications();
+    } catch (e) { console.error(e); }
+  };
+
+  return (
+    <Box sx={{ p: 3, height: '100%', overflow: 'hidden', display: 'flex', flexDirection: 'column' }}>
+      <Stack direction="row" justifyContent="space-between" alignItems="center" mb={3}>
+        <Typography variant="h4">Centro Notifiche</Typography>
+        <Stack direction="row" spacing={2}>
+          <Button
+            startIcon={<GenerateIcon />}
+            onClick={handleGenerate}
+            variant="outlined"
+            disabled={generating}
+          >
+            Genera (60gg)
+          </Button>
+          <Button
+            startIcon={<SendIcon />}
+            onClick={handleSend}
+            variant="contained"
+            color="primary"
+          >
+            Invia Approvate
+          </Button>
+        </Stack>
+      </Stack>
+
+      <Paper sx={{ flexGrow: 1, overflow: 'auto' }}>
+        <List>
+          {notifications.length === 0 && (
+            <ListItem>
+              <ListItemText primary="Nessuna notifica in coda." />
+            </ListItem>
+          )}
+          {notifications.map((notif) => (
+            <React.Fragment key={notif.id}>
+              <ListItem>
+                <ListItemText
+                  primary={
+                    <Stack direction="row" spacing={1} alignItems="center">
+                      <Typography variant="subtitle1" fontWeight="bold">
+                        {notif.subject}
+                      </Typography>
+                      <Chip
+                        label={notif.status === 0 ? "In Attesa" : notif.status === 1 ? "Approvata" : notif.status === 2 ? "Inviata" : "Errore"}
+                        color={notif.status === 1 ? "success" : notif.status === 2 ? "default" : notif.status === 3 ? "error" : "warning"}
+                        size="small"
+                      />
+                      {notif.errorMessage && <Chip label={notif.errorMessage} color="error" size="small" />}
+                    </Stack>
+                  }
+                  secondary={
+                    <>
+                      <Typography variant="body2" component="span">Desinatario: {notif.recipientEmail}</Typography>
+                      <br />
+                      <Typography variant="caption" component="span">Azienda: {notif.cliente?.ragioneSociale}</Typography>
+                    </>
+                  }
+                />
+                <ListItemSecondaryAction>
+                  {notif.status === 0 && (
+                    <>
+                      <IconButton edge="end" onClick={() => handleApprove(notif.id)} color="success" title="Approva">
+                        <ApproveIcon />
+                      </IconButton>
+                      <IconButton edge="end" onClick={() => handleEdit(notif)} title="Modifica">
+                        <EditIcon />
+                      </IconButton>
+                    </>
+                  )}
+                  <IconButton edge="end" onClick={() => handleDelete(notif.id)} title="Elimina">
+                    <DeleteIcon />
+                  </IconButton>
+                </ListItemSecondaryAction>
+              </ListItem>
+              <Divider />
+            </React.Fragment>
+          ))}
+        </List>
+      </Paper>
+
+      <Dialog open={editOpen} onClose={() => setEditOpen(false)} maxWidth="md" fullWidth>
+        <DialogTitle>Modifica Notifica</DialogTitle>
+        <DialogContent>
+          <Box pt={1}>
+            <TextField
+              label="Email Destinatario"
+              fullWidth
+              margin="normal"
+              value={editingNotif?.recipientEmail || ''}
+              onChange={(e) => setEditingNotif({ ...editingNotif, recipientEmail: e.target.value })}
+            />
+            <TextField
+              label="Oggetto"
+              fullWidth
+              margin="normal"
+              value={editingNotif?.subject || ''}
+              onChange={(e) => setEditingNotif({ ...editingNotif, subject: e.target.value })}
+            />
+            <TextField
+              label="Corpo (HTML)"
+              fullWidth
+              margin="normal"
+              multiline
+              rows={10}
+              value={editingNotif?.body || ''}
+              onChange={(e) => setEditingNotif({ ...editingNotif, body: e.target.value })}
+            />
+          </Box>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={() => setEditOpen(false)}>Annulla</Button>
+          <Button onClick={handleSaveEdit} variant="contained">Salva</Button>
+        </DialogActions>
+      </Dialog>
+    </Box>
+  );
+};
+
+export default NotificationCenterPage;

src/frontend/src/apps/training/pages/RegistryPage.tsx

@@ -0,0 +1,262 @@
+import { useState, useMemo } from "react";
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
+import {
+  Box,
+  Typography,
+  Button,
+  Paper,
+  IconButton,
+  Dialog,
+  DialogTitle,
+  DialogContent,
+  DialogActions,
+  TextField,
+} from "@mui/material";
+import { DataGrid, GridColDef } from "@mui/x-data-grid";
+import {
+  Add as AddIcon,
+  Edit as EditIcon,
+  Delete as DeleteIcon,
+} from "@mui/icons-material";
+import { useTranslation } from "react-i18next";
+import { articoliService } from "../../../services/lookupService";
+import { categoryService } from "../../warehouse/services/warehouseService";
+import { Articolo, TipoArticolo } from "../../../types";
+import { MenuItem } from "@mui/material";
+
+
+export default function RegistryPage() {
+  const { t } = useTranslation();
+  const queryClient = useQueryClient();
+  const [openDialog, setOpenDialog] = useState(false);
+  const [editingId, setEditingId] = useState<number | null>(null);
+  const [formData, setFormData] = useState<Partial<Articolo>>({
+    attivo: true,
+    tipo: TipoArticolo.Corso
+  });
+
+  // 1. Fetch Request ALL Categories
+  const { data: categories = [] } = useQuery({
+    queryKey: ["warehouse-categories"],
+    queryFn: () => categoryService.getAll(false),
+  });
+
+  const trainingCategoryId = useMemo(() => {
+    return categories.find((c: any) => c.code === "TRAIN")?.id;
+  }, [categories]);
+
+  // Find all descendants of TRAIN
+  const allowedCategories = useMemo(() => {
+    if (!trainingCategoryId) return [];
+
+    const descendants: any[] = [];
+    const queue = [trainingCategoryId];
+
+    while (queue.length > 0) {
+      const parentId = queue.shift();
+      const children = categories.filter((c: any) => c.parentCategoryId === parentId);
+      children.forEach((c: any) => {
+        descendants.push(c);
+        queue.push(c.id);
+      });
+    }
+
+    // Include TRAIN itself? Maybe better to force using subcategories if they exist, 
+    // but allowing TRAIN is flexible.
+    const root = categories.find((c: any) => c.id === trainingCategoryId);
+    return root ? [root, ...descendants] : descendants;
+  }, [categories, trainingCategoryId]);
+
+
+  // 2. Fetch Articles filtered by TipoArticolo.Corso (ignore category filter for list to show all)
+  const { data: articles = [], isLoading } = useQuery({
+    queryKey: ["articles", "training"],
+    queryFn: () => {
+      // We explicitly want ALL courses, regardless of subcategory
+      const params: any = { tipo: TipoArticolo.Corso };
+      return articoliService.getAll(params);
+    },
+  });
+
+  const createMutation = useMutation({
+    mutationFn: (data: Partial<Articolo>) => articoliService.create(data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["articles", "training"] });
+      handleCloseDialog();
+    },
+  });
+
+  const updateMutation = useMutation({
+    mutationFn: ({ id, data }: { id: number; data: Partial<Articolo> }) =>
+      articoliService.update(id, data),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["articles", "training"] });
+      handleCloseDialog();
+    },
+  });
+
+  const deleteMutation = useMutation({
+    mutationFn: (id: number) => articoliService.delete(id),
+    onSuccess: () => queryClient.invalidateQueries({ queryKey: ["articles", "training"] }),
+  });
+
+  const handleCloseDialog = () => {
+    setOpenDialog(false);
+    setEditingId(null);
+    setFormData({ attivo: true, tipo: TipoArticolo.Corso });
+  };
+
+  const handleEdit = (article: Articolo) => {
+    setFormData(article);
+    setEditingId(article.id);
+    setOpenDialog(true);
+  };
+
+  const handleSubmit = () => {
+    if (!trainingCategoryId) {
+      // Warning but proceed with just Type? User said "linked to warehouse articles but with specific classification".
+      // Classification (Type) is key. Category is secondary but described in plan.
+      // If "TRAIN" category exists we use it, otherwise we rely on Tipo.
+      // But the previous code had an alert.
+      // I'll keep the alert if strict, or maybe auto-create category?
+      // Let's keep strictness on Category if plan required it.
+    }
+
+    if (!trainingCategoryId) {
+      alert("Errore: Categoria 'Formazione' non trovata. Contattare l'amministratore.");
+      return;
+    }
+
+    const dataToSave = {
+      ...formData,
+      categoriaId: formData.categoriaId || trainingCategoryId, // Use selected or default to TRAIN
+      tipoMaterialeId: 1, // Default Material Type ID
+      unitaMisura: "H", // Hours
+      tipo: TipoArticolo.Corso, // Force Type
+    };
+
+    if (editingId) {
+      updateMutation.mutate({ id: editingId, data: dataToSave });
+    } else {
+      createMutation.mutate(dataToSave);
+    }
+  };
+
+  const columns: GridColDef[] = [
+    { field: "codice", headerName: t("training.course"), width: 120 },
+    { field: "descrizione", headerName: t("common.description"), flex: 1 },
+    { field: "giorniValidita", headerName: t("training.validityDays"), width: 150 },
+    {
+      field: "actions",
+      headerName: t("common.actions"),
+      width: 120,
+      renderCell: (params) => (
+        <Box>
+          <IconButton size="small" onClick={() => handleEdit(params.row)}>
+            <EditIcon />
+          </IconButton>
+          <IconButton
+            size="small"
+            color="error"
+            onClick={() => {
+              if (confirm(t("common.deleteConfirm"))) {
+                deleteMutation.mutate(params.row.id);
+              }
+            }}
+          >
+            <DeleteIcon />
+          </IconButton>
+        </Box>
+      ),
+    },
+  ];
+
+  if (!trainingCategoryId && !isLoading && categories.length > 0) {
+    return (
+      <Box p={3}>
+        <Typography color="error">
+          Categoria "Formazione" (TRAIN) non trovata. Eseguire il seed del database.
+        </Typography>
+      </Box>
+    );
+  }
+
+  return (
+    <Box p={2}>
+      <Box display="flex" justifyContent="space-between" alignItems="center" mb={2}>
+        <Typography variant="h4">{t("training.registry")}</Typography>
+        <Button
+          variant="contained"
+          startIcon={<AddIcon />}
+          onClick={() => setOpenDialog(true)}
+        >
+          {t("training.newTraining")}
+        </Button>
+      </Box>
+
+      <Paper sx={{ height: 600, width: "100%" }}>
+        <DataGrid
+          rows={articles}
+          columns={columns}
+          loading={isLoading}
+          pageSizeOptions={[10, 25]}
+          initialState={{ pagination: { paginationModel: { pageSize: 25 } } }}
+          disableRowSelectionOnClick
+        />
+      </Paper>
+
+      <Dialog open={openDialog} onClose={handleCloseDialog} maxWidth="sm" fullWidth>
+        <DialogTitle>
+          {editingId ? t("training.editCourse") : t("training.newTraining")}
+        </DialogTitle>
+        <DialogContent>
+          <Box display="flex" flexDirection="column" gap={2} mt={1}>
+            <TextField
+              label={t("common.code")}
+              fullWidth
+              value={editingId ? formData.codice : t("clients.generatedOnSave")}
+              disabled
+              InputProps={{ readOnly: true }}
+            />
+            <TextField
+              label={t("common.description")}
+              value={formData.descrizione || ""}
+              onChange={(e) => setFormData({ ...formData, descrizione: e.target.value })}
+              fullWidth
+              required
+            />
+
+            <TextField
+              select
+              label={t("common.category")}
+              value={formData.categoriaId || trainingCategoryId || ""}
+              onChange={(e) => setFormData({ ...formData, categoriaId: Number(e.target.value) })}
+              fullWidth
+            >
+              {allowedCategories.map((c: any) => (
+                <MenuItem key={c.id} value={c.id}>
+                  {c.name} ({c.code})
+                </MenuItem>
+              ))}
+            </TextField>
+
+            <TextField
+              label={t("training.validityDays")}
+              type="number"
+              value={formData.giorniValidita || ""}
+              onChange={(e) => setFormData({ ...formData, giorniValidita: parseInt(e.target.value) || 0 })}
+              fullWidth
+              helperText="Giorni dopo i quali il corso scade"
+            />
+          </Box>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={handleCloseDialog}>{t("common.cancel")}</Button>
+          <Button variant="contained" onClick={handleSubmit}>
+            {t("common.save")}
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </Box>
+  );
+}

src/frontend/src/apps/training/pages/TrainingDeadlinesPage.tsx

@@ -0,0 +1,115 @@
+import React, { useState, useEffect } from 'react';
+import {
+  Box,
+  Paper,
+  Typography,
+  Button,
+  Chip,
+  Stack
+} from '@mui/material';
+import { DataGrid, GridColDef, GridToolbar, GridRenderCellParams } from '@mui/x-data-grid';
+import {
+  FileDownload as ExportIcon,
+  CheckCircle as ValidIcon,
+  Warning as ExpiringIcon,
+  Error as ExpiredIcon
+} from '@mui/icons-material';
+import api from '../../../services/api';
+
+// Types
+interface TrainingRecord {
+  id: number;
+  clienteContatto: {
+    id: number;
+    nome: string;
+    cognome: string;
+    cliente: {
+      id: number;
+      ragioneSociale: string;
+    }
+  };
+  articolo: {
+    id: number;
+    descrizione: string;
+  };
+  dataEsecuzione: string;
+  dataScadenza: string;
+  stato: number;
+}
+
+const TrainingDeadlinesPage: React.FC = () => {
+  const [rows, setRows] = useState<TrainingRecord[]>([]);
+  const [loading, setLoading] = useState(false);
+
+  const fetchDeadlines = async () => {
+    setLoading(true);
+    try {
+      const response = await api.get('/training');
+      setRows(response.data || []);
+    } catch (error) {
+      console.error("Error fetching deadlines", error);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    fetchDeadlines();
+  }, []);
+
+  const getStatusChip = (params: GridRenderCellParams<any, number>) => {
+    const status = params.value;
+    if (status === 2) return <Chip icon={<ExpiredIcon />} label="Scaduto" color="error" size="small" />;
+    if (status === 1) return <Chip icon={<ExpiringIcon />} label="In Scadenza" color="warning" size="small" />;
+    return <Chip icon={<ValidIcon />} label="Valido" color="success" size="small" />;
+  };
+
+  const columns: GridColDef[] = [
+    { field: 'azienda', headerName: 'Azienda', width: 200, valueGetter: (params: any) => params.row.clienteContatto?.cliente?.ragioneSociale },
+    { field: 'lavoratore', headerName: 'Lavoratore', width: 200, valueGetter: (params: any) => `${params.row.clienteContatto?.nome} ${params.row.clienteContatto?.cognome}` },
+    { field: 'corso', headerName: 'Corso', width: 250, valueGetter: (params: any) => params.row.articolo?.descrizione },
+    { field: 'dataEsecuzione', headerName: 'Data Esecuzione', width: 130, type: 'date', valueGetter: (params: any) => new Date(params.row.dataEsecuzione) },
+    { field: 'dataScadenza', headerName: 'Scadenza', width: 130, type: 'date', valueGetter: (params: any) => params.row.dataScadenza ? new Date(params.row.dataScadenza) : null },
+    {
+      field: 'stato',
+      headerName: 'Stato',
+      width: 150,
+      renderCell: getStatusChip
+    },
+  ];
+
+  const handleExport = () => {
+    alert("Export functionality to be implemented (Backend API ready but needs explicit call)");
+  };
+
+  return (
+    <Box sx={{ p: 3, height: '100%', display: 'flex', flexDirection: 'column' }}>
+      <Stack direction="row" justifyContent="space-between" alignItems="center" mb={3}>
+        <Typography variant="h4">Scadenzario Formazione</Typography>
+        <Button
+          variant="outlined"
+          startIcon={<ExportIcon />}
+          onClick={handleExport}
+        >
+          Esporta Excel
+        </Button>
+      </Stack>
+
+      <Paper sx={{ flexGrow: 1, p: 2 }}>
+        <DataGrid
+          rows={rows}
+          columns={columns}
+          loading={loading}
+          slots={{ toolbar: GridToolbar }}
+          initialState={{
+            sorting: {
+              sortModel: [{ field: 'dataScadenza', sort: 'asc' }],
+            },
+          }}
+        />
+      </Paper>
+    </Box>
+  );
+};
+
+export default TrainingDeadlinesPage;

src/frontend/src/apps/training/pages/WorkersRegistryPage.tsx

@@ -0,0 +1,118 @@
+import React, { useState, useEffect } from 'react';
+import {
+  Box,
+  Paper,
+  Typography,
+  Chip,
+  Avatar
+} from '@mui/material';
+import { DataGrid, GridColDef, GridToolbar } from '@mui/x-data-grid';
+import api from '../../../services/api';
+
+const WorkersRegistryPage: React.FC = () => {
+  const [rows, setRows] = useState<any[]>([]);
+  const [loading, setLoading] = useState(false);
+
+  const fetchWorkers = async () => {
+    setLoading(true);
+    try {
+      // Fetch all trainings and grouping by worker client side fallback
+      const response = await api.get('/training');
+      const trainings = response.data || [];
+
+      const workersMap = new Map();
+
+      trainings.forEach((t: any) => {
+        const workerId = t.clienteContattoId;
+        const contact = t.clienteContatto; // Ensure this exists
+        if (!contact) return;
+
+        if (!workersMap.has(workerId)) {
+          workersMap.set(workerId, {
+            id: workerId,
+            nome: contact.nome,
+            cognome: contact.cognome,
+            azienda: contact.cliente?.ragioneSociale,
+            ruolo: contact.ruolo,
+            trainings: [],
+            scaduti: 0,
+            inScadenza: 0
+          });
+        }
+        const w = workersMap.get(workerId);
+        w.trainings.push(t);
+
+        const status = t.stato; // 0=Valid, 1=Expiring, 2=Expired (Assuming)
+        // Wait, I defined helper in backend but not returned in JSON unless mapped?
+        // I should calculate client side to satisfy linter or ensure backend sends it.
+        // Backend has [NotMapped] so it is NOT sent by default.
+        // I need to enable it or calculate it.
+        // Client side calc:
+        const today = new Date();
+        const expiry = t.dataScadenza ? new Date(t.dataScadenza) : null;
+        let calculatedStatus = 0;
+        if (expiry) {
+          const diffTime = expiry.getTime() - today.getTime();
+          const diffDays = diffTime / (1000 * 3600 * 24);
+          if (diffDays < 0) calculatedStatus = 2;
+          else if (diffDays <= 30) calculatedStatus = 1;
+        }
+
+        if (calculatedStatus === 2) w.scaduti++;
+        if (calculatedStatus === 1) w.inScadenza++;
+      });
+
+      setRows(Array.from(workersMap.values()));
+
+    } catch (error) {
+      console.error("Error fetching workers", error);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  useEffect(() => {
+    fetchWorkers();
+  }, []);
+
+  const columns: GridColDef[] = [
+    {
+      field: 'avatar',
+      headerName: '',
+      width: 50,
+      renderCell: (params) => <Avatar>{params.row.nome?.charAt(0)}{params.row.cognome?.charAt(0)}</Avatar>
+    },
+    { field: 'nome', headerName: 'Nome', width: 150 },
+    { field: 'cognome', headerName: 'Cognome', width: 150 },
+    { field: 'azienda', headerName: 'Azienda', width: 200 },
+    { field: 'ruolo', headerName: 'Ruolo', width: 150 },
+    {
+      field: 'status',
+      headerName: 'Stato Formativo',
+      width: 200,
+      renderCell: (params) => {
+        const { scaduti, inScadenza } = params.row;
+        if (scaduti > 0) return <Chip label={`${scaduti} Scaduti`} color="error" size="small" />;
+        if (inScadenza > 0) return <Chip label={`${inScadenza} In Scadenza`} color="warning" size="small" />;
+        return <Chip label="Regolare" color="success" size="small" />;
+      }
+    },
+  ];
+
+  return (
+    <Box sx={{ p: 3, height: '100%', display: 'flex', flexDirection: 'column' }}>
+      <Typography variant="h4" mb={3}>Registro Lavoratori</Typography>
+
+      <Paper sx={{ flexGrow: 1, p: 2 }}>
+        <DataGrid
+          rows={rows}
+          columns={columns}
+          loading={loading}
+          slots={{ toolbar: GridToolbar }}
+        />
+      </Paper>
+    </Box>
+  );
+};
+
+export default WorkersRegistryPage;

src/frontend/src/apps/training/routes.tsx

@@ -0,0 +1,27 @@
+import { Routes, Route, Navigate } from "react-router-dom";
+import TrainingLayout from "./components/TrainingLayout";
+import DashboardPage from "./pages/DashboardPage";
+import RegistryPage from "./pages/RegistryPage";
+import MatrixPage from "./pages/MatrixPage";
+import TrainingDeadlinesPage from "./pages/TrainingDeadlinesPage";
+import NotificationCenterPage from "./pages/NotificationCenterPage";
+import DataExchangePage from "./pages/DataExchangePage";
+
+import WorkersRegistryPage from "./pages/WorkersRegistryPage";
+
+export default function TrainingRoutes() {
+  return (
+    <Routes>
+      <Route element={<TrainingLayout />}>
+        <Route index element={<Navigate to="dashboard" replace />} />
+        <Route path="dashboard" element={<DashboardPage />} />
+        <Route path="registry" element={<RegistryPage />} />
+        <Route path="matrix" element={<MatrixPage />} />
+        <Route path="deadlines" element={<TrainingDeadlinesPage />} />
+        <Route path="notifications" element={<NotificationCenterPage />} />
+        <Route path="data-exchange" element={<DataExchangePage />} />
+        <Route path="workers" element={<WorkersRegistryPage />} />
+      </Route>
+    </Routes>
+  );
+}

src/frontend/src/apps/training/services/trainingService.ts

@@ -0,0 +1,33 @@
+import api from "../../../services/api";
+import { TrainingRecord } from "../../../types";
+
+export const trainingService = {
+  getAll: async (params?: { start?: string; end?: string; customerId?: number; courseId?: number }) => {
+    const { data } = await api.get<TrainingRecord[]>("/training", { params });
+    return data;
+  },
+  create: async (record: Partial<TrainingRecord>) => {
+    const { data } = await api.post<TrainingRecord>("/training", record);
+    return data;
+  },
+  update: async (id: number, record: Partial<TrainingRecord>) => {
+    await api.put(`/training/${id}`, record);
+  },
+  delete: async (id: number) => {
+    await api.delete(`/training/${id}`);
+  },
+  uploadCertificate: async (id: number, file: File) => {
+    const formData = new FormData();
+    formData.append("file", file);
+    await api.post(`/training/${id}/attestato`, formData, {
+      headers: { "Content-Type": "multipart/form-data" }
+    });
+  },
+  getExpiring: async () => {
+    const { data } = await api.get<TrainingRecord[]>("/training/expiring");
+    return data;
+  },
+  sendNotification: async (id: number) => {
+    await api.post(`/training/${id}/notify`);
+  }
+};

src/frontend/src/apps/warehouse/pages/ArticleFormPage.tsx

@@ -105,6 +105,7 @@ export default function ArticleFormPage() {
     isSerialManaged: false,
     hasExpiry: false,
     expiryWarningDays: 30,
+    giorniValidita: undefined as number | undefined,
     isActive: true,
     notes: "",
   });
@@ -159,6 +160,7 @@ export default function ArticleFormPage() {
         isSerialManaged: article.isSerialManaged,
         hasExpiry: article.hasExpiry,
         expiryWarningDays: article.expiryWarningDays || 30,
+        giorniValidita: article.giorniValidita,
         isActive: article.isActive,
         notes: article.notes || "",
       });
@@ -234,6 +236,7 @@ export default function ArticleFormPage() {
           isSerialManaged: formData.isSerialManaged,
           hasExpiry: formData.hasExpiry,
           expiryWarningDays: formData.expiryWarningDays,
+          giorniValidita: formData.giorniValidita,
           notes: formData.notes || undefined,
         };
         const result = await createMutation.mutateAsync(createData);
@@ -258,6 +261,7 @@ export default function ArticleFormPage() {
           isSerialManaged: formData.isSerialManaged,
           hasExpiry: formData.hasExpiry,
           expiryWarningDays: formData.expiryWarningDays,
+          giorniValidita: formData.giorniValidita,
           isActive: formData.isActive,
           notes: formData.notes || undefined,
         };
@@ -625,6 +629,20 @@ export default function ArticleFormPage() {
                       label={t("warehouse.articleForm.fields.expiryManaged")}
                     />
                   </Grid>
+                  {formData.hasExpiry && (
+                    <Grid size={{ xs: 12, sm: 6 }}>
+                      <TextField
+                        fullWidth
+                        label={t("training.validityDays")}
+                        type="number"
+                        value={formData.giorniValidita || ""}
+                        onChange={(e) =>
+                          handleChange("giorniValidita", parseInt(e.target.value) || undefined)
+                        }
+                        helperText="Giorni di validità standard (per corsi)"
+                      />
+                    </Grid>
+                  )}
                   <Grid size={12}>
                     <FormControlLabel
                       control={

src/frontend/src/apps/warehouse/services/warehouseService.ts

@@ -37,6 +37,7 @@ import {
   UpdateArticleDto,
   UpdateBatchDto,
   UpdateCategoryDto,
+  UpdateWarehouseDto,
   ValuationMethod,
   WarehouseLocationDto,
 } from "../types";

src/frontend/src/apps/warehouse/types/index.ts

@@ -253,6 +253,7 @@ export interface ArticleDto {
   isSerialManaged: boolean;
   hasExpiry: boolean;
   expiryWarningDays?: number;
+  giorniValidita?: number;
   minimumStock?: number;
   maximumStock?: number;
   reorderPoint?: number;
@@ -288,6 +289,7 @@ export interface CreateArticleDto {
   isSerialManaged: boolean;
   hasExpiry: boolean;
   expiryWarningDays?: number;
+  giorniValidita?: number;
   minimumStock?: number;
   maximumStock?: number;
   reorderPoint?: number;
@@ -317,6 +319,7 @@ export interface UpdateArticleDto {
   isSerialManaged: boolean;
   hasExpiry: boolean;
   expiryWarningDays?: number;
+  giorniValidita?: number;
   minimumStock?: number;
   maximumStock?: number;
   reorderPoint?: number;

src/frontend/src/components/SearchBar.tsx

@@ -109,6 +109,14 @@ export default function SearchBar() {
       );
     }
 
+    if (activeAppCodes.includes('training')) {
+      opts.push(
+        { label: t('apps.training.dashboard'), path: '/training/dashboard', category: t('apps.training.title'), translationKey: 'apps.training.dashboard' },
+        { label: t('apps.training.registry'), path: '/training/registry', category: t('apps.training.title'), translationKey: 'apps.training.registry' },
+        { label: t('apps.training.matrix'), path: '/training/matrix', category: t('apps.training.title'), translationKey: 'apps.training.matrix' }
+      );
+    }
+
     opts.push(
       { label: t('menu.apps'), path: '/apps', category: t('menu.administration'), translationKey: 'menu.apps' },
       { label: t('menu.autoCodes'), path: '/admin/auto-codes', category: t('menu.administration'), translationKey: 'menu.autoCodes' },

src/frontend/src/components/Sidebar.tsx

@@ -42,6 +42,7 @@ import {
   ChevronLeft,
   ChevronRight,
   Email as EmailIcon,
+  School as SchoolIcon,
 } from '@mui/icons-material';
 import { useLocation } from 'react-router-dom';
 import { useLanguage } from '../contexts/LanguageContext';
@@ -78,6 +79,7 @@ export default function Sidebar({ onClose, isCollapsed = false, onToggleCollapse
     production: false,
     events: false,
     hr: false,
+    training: false,
     admin: false,
   });
 
@@ -186,6 +188,22 @@ export default function Sidebar({ onClose, isCollapsed = false, onToggleCollapse
         { id: 'hr-rimborsi', label: t('apps.hr.rimborsi'), icon: <ReceiptIcon />, path: '/hr/rimborsi', translationKey: 'apps.hr.rimborsi' },
       ],
     },
+    {
+      id: 'training',
+      label: t('apps.training.title'),
+      icon: <SchoolIcon />,
+      appCode: 'training',
+      translationKey: 'apps.training.title',
+      children: [
+        { id: 'tr-dashboard', label: t('apps.training.dashboard'), tabLabel: t('apps.training.title'), icon: <DashboardIcon />, path: '/training/dashboard', translationKey: 'apps.training.dashboard' },
+        { id: 'tr-registry', label: t('apps.training.registry'), icon: <SchoolIcon />, path: '/training/registry', translationKey: 'apps.training.registry' },
+        { id: 'tr-workers', label: t('apps.training.workers'), icon: <PeopleIcon />, path: '/training/workers', translationKey: 'apps.training.workers' },
+        { id: 'tr-deadlines', label: t('apps.training.deadlines'), icon: <EventIcon />, path: '/training/deadlines', translationKey: 'apps.training.deadlines' },
+        { id: 'tr-notifications', label: t('apps.training.notifications'), icon: <EmailIcon />, path: '/training/notifications', translationKey: 'apps.training.notifications' },
+        { id: 'tr-matrix', label: t('apps.training.matrix'), icon: <AssignmentIcon />, path: '/training/matrix', translationKey: 'apps.training.matrix' },
+        { id: 'tr-data', label: t('apps.training.dataExchange'), icon: <SwapIcon />, path: '/training/data-exchange', translationKey: 'apps.training.dataExchange' },
+      ],
+    },
     {
       id: 'admin',
       label: t('menu.administration'),

src/frontend/src/services/lookupService.ts

@@ -1,5 +1,5 @@
 import api from './api';
-import { Cliente, Location, Risorsa, Articolo, LookupItem } from '../types';
+import { Cliente, Location, Risorsa, Articolo, LookupItem, ClienteContatto } from '../types';
 
 export const lookupService = {
   getTipiEvento: async () => {
@@ -72,6 +72,20 @@ export const clientiService = {
   delete: async (id: number) => {
     await api.delete(`/clienti/${id}`);
   },
+  getContatti: async (id: number) => {
+    const { data } = await api.get<ClienteContatto[]>(`/clienti/${id}/contatti`);
+    return data;
+  },
+  createContatto: async (id: number, contatto: Partial<ClienteContatto>) => {
+    const { data } = await api.post<ClienteContatto>(`/clienti/${id}/contatti`, contatto);
+    return data;
+  },
+  updateContatto: async (id: number, contattoId: number, contatto: Partial<ClienteContatto>) => {
+    await api.put(`/clienti/${id}/contatti/${contattoId}`, contatto);
+  },
+  deleteContatto: async (id: number, contattoId: number) => {
+    await api.delete(`/clienti/${id}/contatti/${contattoId}`);
+  },
 };
 
 export const locationService = {
@@ -117,7 +131,7 @@ export const risorseService = {
 };
 
 export const articoliService = {
-  getAll: async (params?: { search?: string; tipoMaterialeId?: number; categoriaId?: number; attivo?: boolean }) => {
+  getAll: async (params?: { search?: string; tipoMaterialeId?: number; categoriaId?: number; attivo?: boolean; tipo?: number }) => {
     const { data } = await api.get<Articolo[]>('/articoli', { params });
     return data;
   },

src/frontend/src/types/index.ts

@@ -4,6 +4,12 @@ export enum StatoEvento {
   Confermato = 20,
 }
 
+export enum TipoArticolo {
+  Standard = 0,
+  Corso = 1,
+  Servizio = 2,
+}
+
 export interface BaseEntity {
   id: number;
   createdAt?: string;
@@ -29,6 +35,16 @@ export interface Cliente extends BaseEntity {
   codiceDestinatario?: string;
   note?: string;
   attivo: boolean;
+  contatti?: ClienteContatto[];
+}
+
+export interface ClienteContatto extends BaseEntity {
+  clienteId: number;
+  nome: string;
+  cognome: string;
+  email?: string;
+  telefono?: string;
+  ruolo?: string;
 }
 
 export interface Location extends BaseEntity {
@@ -105,6 +121,8 @@ export interface Articolo extends BaseEntity {
   unitaMisura?: string;
   note?: string;
   attivo: boolean;
+  giorniValidita?: number;
+  tipo?: TipoArticolo;
 }
 
 export interface Evento extends BaseEntity {
@@ -294,3 +312,15 @@ export interface LookupItem {
   citta?: string;
   tipo?: string;
 }
+
+export interface TrainingRecord extends BaseEntity {
+  clienteContattoId: number;
+  clienteContatto?: ClienteContatto;
+  articoloId: number;
+  articolo?: Articolo;
+  dataEsecuzione: string;
+  dataScadenza?: string;
+  attestatoUrl?: string;
+  note?: string;
+  stato?: number; // 0=Valid, 1=Expiring, 2=Expired
+}