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/dispatch.test.mjs

@@ -12,7 +12,8 @@ import {
 function makeWorkTree({ epics }) {
   const root = fs.mkdtempSync(path.join(os.tmpdir(), "dispatch-"));
   for (const [epicId, epicData] of Object.entries(epics)) {
-    const epicDir = path.join(root, epicId);
+    // findNextTask/buildState walk <workRoot>/epics/ — mirror docs/work.
+    const epicDir = path.join(root, "epics", epicId);
     fs.mkdirSync(epicDir, { recursive: true });
     fs.writeFileSync(
       path.join(epicDir, "_epic.md"),