feat: conversations on the left, the transcript on the right (#6)

src/lib/sessions.ts

@@ -22,6 +22,11 @@ function newId(): string {
   return `${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 8)}`;
 }
 
+/** Builds the lightweight index record kept in the session list. */
+export function summarizeSession(session: Session): SessionSummary {
+  return summarize(session);
+}
+
 function sessionKey(id: string): string {
   return `${STORAGE_SESSION_PREFIX}${id}`;
 }