working epics ioc and tested

web/src/EditMode.tsx

@@ -10,7 +10,7 @@ import HelpModal from './HelpModal';
 
 interface Props {
   initial: Interface | null;
-  onDone: () => void;
+  onDone: (iface: Interface) => void;
 }
 
 function blankInterface(): Interface {
@@ -229,7 +229,7 @@ export default function EditMode({ initial, onDone }: Props) {
 
   function handleLeave() {
     if (dirty && !confirm('You have unsaved changes. Leave without saving?')) return;
-    onDone();
+    onDone(iface);
   }
 
   // ── Keyboard shortcuts ─────────────────────────────────────────────────────