Different updates

Changed API behaviour to manage Session objects
Added route in frontend to link to API

front_end/src/components/createSession.tsx

@@ -22,7 +22,7 @@ export const CreateSession = () => {
         newActivite.nom= activiteNom;
         newActivite.theme=activiteTheme;
         newActivite.duree= activiteDuree;
-        newActivite.data= new Map<String,String>();
+        newActivite.data= new Map<string,string>();
         setActivities([...activities, newActivite]);
 
         setActiviteNom("");
@@ -31,22 +31,27 @@ export const CreateSession = () => {
     }
 
     async function handleCreateSession() {
-        const newSession = {
-            name,
-            activites: activities,
-            groupe,
-            creneau: new Date(creneau),
-            duree,
+        const data = {
+            name: name,
+            creneau: creneau, // string ISO OK
+            duree: duree,
             isRecurrent: isRecurent,
-            coach: user,
-            athletes: []
+
+            coachId: user?.id,
+            groupe: groupe ? groupe : undefined,
+
+            activites: activities.map(a => ({
+                nom: a.nom,
+                theme: a.theme,
+                duree: a.duree
+            }))
         };
 
         try {
-            const response = await sessionService.create(newSession);
-            console.log("Session créée :", response.data);
+            await sessionService.create(data);
+            console.log("Session créée");
 
-            // reset après succès
+            // reset
             setName("");
             setGroupe("");
             setCreneau("");
@@ -59,6 +64,7 @@ export const CreateSession = () => {
     }
 
 
+
     return (
         <div className="ent">
         <h2>Activité</h2>