test(scripts): wire scripts/**/*.test.mjs under a vitest runner

241 tests across 16 script test files were wired to NO runner (the
generators vitest config never included them and several used node:test
imports that vitest silently skips). New root vitest.scripts.config.mjs
+ pnpm test:scripts + a CI validate step run them all; node:test imports
converted to vitest keeping node:assert. Split out of 8c88a9a where a
concurrent agent's staged files were swept into the marketing-pages
commit.

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

scripts/work/state-builder.test.mjs

@@ -12,7 +12,8 @@ import {
 function makeWorkTree({ epics }) {
   const root = fs.mkdtempSync(path.join(os.tmpdir(), "work-state-"));
   for (const [epicId, epicData] of Object.entries(epics)) {
-    const epicDir = path.join(root, epicId);
+    // buildState walks <workRoot>/epics/ — mirror the real docs/work layout.
+    const epicDir = path.join(root, "epics", epicId);
     fs.mkdirSync(epicDir, { recursive: true });
     fs.writeFileSync(
       path.join(epicDir, "_epic.md"),
@@ -85,6 +86,7 @@ describe("buildState", () => {
       epic1: {
         status: "in-progress",
         title: "epic1",
+        prd: null,
         stories: {
           story1: {
             status: "done",
@@ -127,7 +129,7 @@ describe("buildState", () => {
 
   it("parses depends-on and blocks frontmatter arrays", () => {
     const root = fs.mkdtempSync(path.join(os.tmpdir(), "work-dep-"));
-    const epicDir = path.join(root, "epic1");
+    const epicDir = path.join(root, "epics", "epic1");
     fs.mkdirSync(epicDir, { recursive: true });
     fs.writeFileSync(
       path.join(epicDir, "_epic.md"),