fix(frontend): 'Other — specify' opens a text field and emits control:freetext

frontend/src/widgets/ArtifactGateWidget.tsx

@@ -53,7 +53,7 @@ export function ArtifactGateWidget({ descriptor, onRespond }: WidgetProps) {
       </div>
       <ReservedControls
         reserved={descriptor.reserved}
-        onControl={(c) => onRespond({ id: descriptor.id, control: c })}
+        onControl={(c, t) => onRespond({ id: descriptor.id, control: c, ...(t !== undefined ? { text: t } : {}) })}
       />
     </div>
   );

frontend/src/widgets/MultiselectWidget.tsx

@@ -57,7 +57,7 @@ export function MultiselectWidget({ descriptor, onRespond }: WidgetProps) {
       </button>
       <ReservedControls
         reserved={descriptor.reserved}
-        onControl={(c) => onRespond({ id: descriptor.id, control: c })}
+        onControl={(c, t) => onRespond({ id: descriptor.id, control: c, ...(t !== undefined ? { text: t } : {}) })}
       />
     </div>
   );

frontend/src/widgets/ReservedControls.test.tsx

@@ -0,0 +1,23 @@
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { ReservedControls } from "./ReservedControls";
+
+test("back and exit fire immediately with no text", async () => {
+  const onControl = vi.fn();
+  render(<ReservedControls reserved={["back", "exit"]} onControl={onControl} />);
+  await userEvent.click(screen.getByRole("button", { name: /go back/i }));
+  expect(onControl).toHaveBeenCalledWith("back");
+  await userEvent.click(screen.getByRole("button", { name: /^exit$/i }));
+  expect(onControl).toHaveBeenCalledWith("exit");
+});
+
+test("other reveals a textarea and emits freetext with the typed text", async () => {
+  const onControl = vi.fn();
+  render(<ReservedControls reserved={["other"]} onControl={onControl} />);
+  await userEvent.click(screen.getByRole("button", { name: /other — specify/i }));
+  // clicking Other does NOT emit a control yet — it reveals the input
+  expect(onControl).not.toHaveBeenCalled();
+  await userEvent.type(screen.getByRole("textbox"), "usa la tabella X");
+  await userEvent.click(screen.getByRole("button", { name: /send/i }));
+  expect(onControl).toHaveBeenCalledWith("freetext", "usa la tabella X");
+});

frontend/src/widgets/ReservedControls.tsx

@@ -1,7 +1,42 @@
+import { useState } from "react";
+
 const LABELS: Record<string, string> = { back: "Go back", exit: "Exit", other: "Other — specify" };
-export function ReservedControls({ reserved, onControl }: { reserved?: string[]; onControl: (c: string) => void }) {
+
+export function ReservedControls({
+  reserved,
+  onControl,
+}: {
+  reserved?: string[];
+  onControl: (c: string, text?: string) => void;
+}) {
+  const [otherOpen, setOtherOpen] = useState(false);
+  const [text, setText] = useState("");
   if (!reserved?.length) return null;
-  return <div className="flex gap-2 pt-2">{reserved.map((c) => (
-    <button key={c} className="text-sm border rounded px-2 py-1" onClick={() => onControl(c)}>{LABELS[c] ?? c}</button>
-  ))}</div>;
+  return (
+    <div className="flex flex-col gap-2 pt-2">
+      <div className="flex gap-2">
+        {reserved.map((c) => (
+          <button
+            key={c}
+            className="text-sm border rounded px-2 py-1"
+            onClick={() => (c === "other" ? setOtherOpen(true) : onControl(c))}
+          >
+            {LABELS[c] ?? c}
+          </button>
+        ))}
+      </div>
+      {otherOpen && (
+        <div className="flex flex-col gap-1">
+          <textarea
+            className="w-full border rounded p-2"
+            value={text}
+            onChange={(e) => setText(e.target.value)}
+          />
+          <button className="text-sm border rounded px-2 py-1 self-start" onClick={() => onControl("freetext", text)}>
+            Send
+          </button>
+        </div>
+      )}
+    </div>
+  );
 }

frontend/src/widgets/SelectWidget.tsx

@@ -13,7 +13,7 @@ export function SelectWidget({ descriptor, onRespond }: WidgetProps) {
           </button>
         ))}
       </div>
-      <ReservedControls reserved={descriptor.reserved} onControl={(c) => onRespond({ id: descriptor.id, control: c })} />
+      <ReservedControls reserved={descriptor.reserved} onControl={(c, t) => onRespond({ id: descriptor.id, control: c, ...(t !== undefined ? { text: t } : {}) })} />
     </div>
   );
 }