Add contract management and service type linkage to site data

Update the database schema to include contract details for sites and link sites to service types, while making shift type optional.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: e5565357-90e1-419f-b9a8-6ee8394636df
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/6d543d2c-20b9-4ea6-93fe-70fe9b1d9f80/e5565357-90e1-419f-b9a8-6ee8394636df/FlO7tHX

.replit

@@ -31,10 +31,6 @@ externalPort = 3002
 localPort = 43267
 externalPort = 3003
 
-[[ports]]
-localPort = 43839
-externalPort = 4200
-
 [env]
 PORT = "5000"
 

replit.md

@@ -33,6 +33,8 @@ The database includes core tables for `users`, `guards`, `certifications`, `site
 **Recent Schema Updates (October 2025)**:
 - Service types now include specialized parameters: `fixedPostHours` (ore presidio fisso), `patrolPassages` (numero passaggi pattuglia), `inspectionFrequency` (frequenza ispezioni), `responseTimeMinutes` (tempo risposta pronto intervento)
 - Sites include service schedule fields: `serviceStartTime` and `serviceEndTime` (formato HH:MM)
+- **Contract Management**: Sites now include contract fields: `contractReference` (codice contratto), `contractStartDate`, `contractEndDate` (date validità contratto in formato YYYY-MM-DD)
+- Sites now reference service types via `serviceTypeId` foreign key; `shiftType` is optional and can be derived from service type
 
 ### API Endpoints
 Comprehensive RESTful API endpoints are provided for Authentication, Users, Guards, Sites, Shifts, and Notifications, supporting full CRUD operations with role-based access control.
@@ -49,7 +51,7 @@ Key frontend routes include `/`, `/guards`, `/sites`, `/shifts`, `/reports`, `/n
 ### Key Features
 - **Dashboard Operativa**: Live KPIs (active shifts, total guards, active sites, expiring certifications) and real-time shift status.
 - **Gestione Guardie**: Complete profiles with skill matrix (armed, fire safety, first aid, driver's license), certification management with automatic expiry, and unique badge numbers.
-- **Gestione Siti/Commesse**: Service types with specialized parameters (fixed post hours, patrol passages, inspection frequency, response time) and minimum requirements (guard count, armed, driver's license). Sites include service schedule (start/end time).
+- **Gestione Siti/Commesse**: Service types with specialized parameters (fixed post hours, patrol passages, inspection frequency, response time) and minimum requirements (guard count, armed, driver's license). Sites include service schedule (start/end time) and contract management (reference code, validity period with start/end dates). Contract status is visualized with badges (active/expiring/expired) and enforces shift creation only within active contract periods.
 - **Pianificazione Operativa Interattiva**: Three-step workflow for shift assignment:
   1. Select date → view uncovered sites with coverage status
   2. Select site → view filtered resources (guards and vehicles matching requirements)

shared/schema.ts

@@ -205,7 +205,8 @@ export const sites = pgTable("sites", {
   location: locationEnum("location").notNull().default("roccapiemonte"), // Sede gestionale
   
   // Service requirements
-  shiftType: shiftTypeEnum("shift_type").notNull(),
+  serviceTypeId: varchar("service_type_id").references(() => serviceTypes.id),
+  shiftType: shiftTypeEnum("shift_type"), // Optional - can be derived from service type
   minGuards: integer("min_guards").notNull().default(1),
   requiresArmed: boolean("requires_armed").default(false),
   requiresDriverLicense: boolean("requires_driver_license").default(false),