chore: script/bootstrap fails when node cannot find a module the tests load (closes #263)

yarn install exits 0 without touching node_modules whenever
node_modules/.yarn-integrity matches yarn.lock, so a package deleted from
node_modules stayed deleted while bootstrap printed "bootstrap complete".
After the install, bootstrap now asks node to resolve jest,
playwright-core and ethers, and on the first it cannot find it names the
module and the fix: rm -rf node_modules && make bootstrap.

Model: opus-5-5

TODO.md

@@ -45,6 +45,15 @@ but the review is broader than any of them.
 
 # Completed Steps
 
+- 2026-10-06: `script/bootstrap` no longer reports success while node cannot
+  find a module the tests load
+  ([#263](https://git.eeqj.de/sneak/AutistMask/issues/263)). After the install
+  it asks node for `jest`, `playwright-core` and `ethers`, and fails naming the
+  missing one and the fix. yarn skips the install whenever
+  `node_modules/.yarn-integrity` matches `yarn.lock`, so a package deleted from
+  `node_modules` stayed deleted while bootstrap said it was complete. The
+  fresh-clone failure the issue reports did not reproduce.
+
 - 2026-10-06: A token symbol or name read off a contract is no longer stored cut
   between the two halves of an emoji
   ([#458](https://git.eeqj.de/sneak/AutistMask/issues/458)). `lookupTokenInfo()`