chore: scaffold, CI, and the export bundle verbatim

The export bundle is the input to this port, not a sketch: the curriculum,
the tutor prompt and the five logic modules are finished and tested. They
land here byte-identical and stay that way.

  diff -r export/data data && diff -r export/lib lib
  diff -r export/prompt prompt && diff export/validate.mjs validate.mjs

data/, lib/, prompt/ and validate.mjs sit at the repo root so validate.mjs
runs verbatim with no path edits. All four are excluded from lint and
formatting — they are not ours to restyle. Types for lib/ live alongside in
types/ rather than as sibling .d.ts files, so the verbatim check stays a
plain directory diff.

CI runs the curriculum gate first, before anything else can pass:

  node validate.mjs   PASS — 0 blocking, 0 advisory

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

vitest.config.ts

@@ -0,0 +1,23 @@
+import { defineConfig } from "vitest/config";
+import { fileURLToPath } from "node:url";
+
+const at = (p: string) => fileURLToPath(new URL(p, import.meta.url));
+
+export default defineConfig({
+  resolve: {
+    alias: {
+      // The declarations live in types/lib/; the code is the verbatim lib/.
+      "@lib": at("./lib"),
+      "@data": at("./data"),
+      "@app": at("./app/src"),
+      "@shared": at("./shared"),
+      "@prompt": at("./prompt"),
+    },
+  },
+  test: {
+    include: ["test/**/*.test.ts"],
+    environment: "node",
+    // sqlite-wasm loads a .wasm file; give the db suite room.
+    testTimeout: 30_000,
+  },
+});