fix(gate): buildArtifactGate emits approve/reject options so the gate renders a forward button

harness/.pi/extensions/gate/__tests__/builders.test.js

@@ -159,3 +159,28 @@ test("artifact-gate with unknown action kind throws clearly", () => {
     /action/i,
   );
 });
+
+test("buildArtifactGate derives approve/reject options from action.kind", () => {
+  const w = buildArtifactGate({
+    id: "u1",
+    phase: "F1",
+    title: "Chiudi fase",
+    artifact: { kind: "phase", data: {} },
+    action: { kind: "approve_reject" },
+  });
+  assert.deepEqual(w.options, [
+    { id: "approve", label: "Conferma e prosegui", recommended: true },
+    { id: "reject", label: "Rifiuta" },
+  ]);
+});
+
+test("buildArtifactGate: confirm -> single approve; view_only -> no options", () => {
+  const confirm = buildArtifactGate({
+    id: "u1", phase: "F1", title: "t", artifact: { kind: "phase", data: {} }, action: { kind: "confirm" },
+  });
+  assert.deepEqual(confirm.options, [{ id: "approve", label: "Conferma e prosegui", recommended: true }]);
+  const viewOnly = buildArtifactGate({
+    id: "u1", phase: "F1", title: "t", artifact: { kind: "phase", data: {} }, action: { kind: "view_only" },
+  });
+  assert.deepEqual(viewOnly.options, []);
+});

harness/.pi/extensions/gate/builders.js

@@ -112,6 +112,14 @@ function buildArtifactGate({ id, phase, title, artifact, action }) {
       `builders: artifact-gate action.kind must be one of ${[...VALID_ACTION_KINDS].join(", ")}`,
     );
   }
+  const ACTION_OPTIONS = {
+    approve_reject: [
+      { id: "approve", label: "Conferma e prosegui", recommended: true },
+      { id: "reject", label: "Rifiuta" },
+    ],
+    confirm: [{ id: "approve", label: "Conferma e prosegui", recommended: true }],
+    view_only: [],
+  };
   return {
     type: "ui_request",
     id,
@@ -121,6 +129,7 @@ function buildArtifactGate({ id, phase, title, artifact, action }) {
     title,
     artifact,
     action,
+    options: ACTION_OPTIONS[action.kind],
     reserved: RESERVED,
   };
 }