fix(directory) : refresh clients list after converting a prospect

Converting a prospect creates a client and removes the prospect, but only
loadProspects() was called, so the new client did not appear in the Clients
tab until a manual page refresh. Both the table convert button and the
ProspectDrawer saved event now reload prospects and clients.

frontend/modules/directory/pages/directory/index.vue

@@ -103,7 +103,7 @@
         <ProspectDrawer
             v-model="prospectDrawerOpen"
             :prospect="selectedProspect"
-            @saved="loadProspects"
+            @saved="onProspectSaved"
         />
     </div>
 </template>
@@ -215,7 +215,14 @@ function openEditProspect(item: Record<string, unknown>) {
 
 async function convertProspect(row: ProspectRow) {
     await prospectService.convert(row.id)
-    await loadProspects()
+    // La conversion crée un client et retire le prospect : rafraîchir les deux listes.
+    await Promise.all([loadProspects(), loadClients()])
+}
+
+// Le ProspectDrawer porte aussi le bouton « Convertir » : son event 'saved' peut
+// donc être une conversion → toujours rafraîchir les deux listes par sécurité.
+async function onProspectSaved() {
+    await Promise.all([loadProspects(), loadClients()])
 }
 
 watch(statusFilter, loadProspects)