Ajout du graphique de temps cumulé sur l'année

ou les 12 derniers mois.

Front/skydivelogs-app/src/models/tunnel-flight.ts

@@ -1,3 +1,4 @@
+import { formatDate } from '@angular/common';
 import { DropZoneResp } from './dropzone';
 
 export class TunnelFlightReq {
@@ -29,6 +30,7 @@ export class TunnelFlight {
   constructor(data: any) {
     Object.assign(this, data);
     this.flightDate = new Date(data.flightDate);
+    this.flightMonth = formatDate(this.flightDate, "yy-MM", "en")
   }
 
   public id: number;
@@ -36,4 +38,5 @@ export class TunnelFlight {
   public nbMinutes: number;
   public notes: string;
   public flightDate: Date;
+  public flightMonth: string;
 }