feat(learner): library, search, course outline with gating, lesson payload API

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/feature-learner/test/gating.test.ts

@@ -0,0 +1,21 @@
+import { expect, test } from "bun:test";
+import { parseManifest } from "@stc/course-format";
+import { moduleLocks } from "../src/server/gating";
+
+const m = (gating: string) => {
+  const r = parseManifest(`schema: 1\nid: g\ntitle: G\ngating: ${gating}\nmodules:\n  - { id: a, title: A, lessons: [{ id: a1, title: A1, type: exercise }, { id: a2, title: A2, type: exercise }] }\n  - { id: b, title: B, lessons: [{ id: b1, title: B1, type: exercise }] }\n  - { id: c, title: C, lessons: [{ id: c1, title: C1, type: exercise }] }\n`);
+  if (!r.ok) throw new Error(r.errors.join());
+  return r.manifest;
+};
+
+test("no gating unlocks everything", () => {
+  expect(moduleLocks(m("none"), {})).toEqual([false, false, false]);
+});
+test("sequential gating locks until the previous module is done", () => {
+  expect(moduleLocks(m("sequential"), {})).toEqual([false, true, true]);
+  expect(moduleLocks(m("sequential"), { a1: { state: "done" } })).toEqual([false, true, true]);
+  expect(moduleLocks(m("sequential"), { a1: { state: "done" }, a2: { state: "done" } })).toEqual([false, false, true]);
+  // done later modules do not unlock past an unfinished one
+  expect(moduleLocks(m("sequential"), { a1: { state: "done" }, a2: { state: "done" }, c1: { state: "done" } })).toEqual([false, false, true]);
+  expect(moduleLocks(m("sequential"), {}, true)).toEqual([false, false, false]);
+});