feat(frontend): store lastUserEntry + stepMessages; record user input/choice

frontend/src/store/sessionStore.test.ts

@@ -1,3 +1,4 @@
+import { test, expect, beforeEach } from "vitest";
 import { useSessionStore } from "./sessionStore";
 
 beforeEach(() => useSessionStore.getState().resetSession());
@@ -14,9 +15,9 @@ test("text_delta accumulates into transcript", () => {
   expect(useSessionStore.getState().transcript.at(-1)?.text).toBe("Analisi");
 });
 
-test("info pushes a toast", () => {
+test("info appends to stepMessages", () => {
   useSessionStore.getState().applyEvent({ type: "info", level: "warning", text: "attenzione" });
-  expect(useSessionStore.getState().toasts.at(-1)).toEqual({ level: "warning", text: "attenzione" });
+  expect(useSessionStore.getState().stepMessages.at(-1)).toEqual({ level: "warning", text: "attenzione" });
 });
 
 test("clearPending removes the widget", () => {
@@ -42,3 +43,30 @@ test("pushToast appends an error toast", () => {
   useSessionStore.getState().pushToast({ level: "error", text: "boom" });
   expect(useSessionStore.getState().toasts.at(-1)).toEqual({ level: "error", text: "boom" });
 });
+
+test("info events accumulate in stepMessages", () => {
+  const { applyEvent } = useSessionStore.getState();
+  applyEvent({ type: "info", level: "info", text: "found 3 tables" });
+  applyEvent({ type: "info", level: "warning", text: "ambiguous term" });
+  expect(useSessionStore.getState().stepMessages).toEqual([
+    { level: "info", text: "found 3 tables" },
+    { level: "warning", text: "ambiguous term" },
+  ]);
+});
+
+test("setLastUserEntry records the entry and clears stepMessages", () => {
+  const st = useSessionStore.getState();
+  st.applyEvent({ type: "info", level: "info", text: "x" });
+  st.setLastUserEntry({ kind: "input", text: "my question" });
+  expect(useSessionStore.getState().lastUserEntry).toEqual({ kind: "input", text: "my question" });
+  expect(useSessionStore.getState().stepMessages).toEqual([]);
+});
+
+test("resetSession clears lastUserEntry and stepMessages", () => {
+  const st = useSessionStore.getState();
+  st.setLastUserEntry({ kind: "choice", text: "promote" });
+  st.applyEvent({ type: "info", level: "info", text: "y" });
+  st.resetSession();
+  expect(useSessionStore.getState().lastUserEntry).toBeNull();
+  expect(useSessionStore.getState().stepMessages).toEqual([]);
+});