milestone 23: correct three comments the s1 review found inaccurate

web/src/ui/styles.test.tsx

@@ -4,9 +4,10 @@ import { styles } from "./styles";
 
 /**
  * The StyleX compile-time transform must run in the vitest pipeline, not just
- * in `vite build`. `runtimeInjection` is off, so an untransformed
- * `stylex.props` call yields no class name at all — this probe fails loudly if
- * the plugin ever drops out of the test config (milestone 23, ruling 1).
+ * in `vite build`. Without the plugin these tests do not fail an assertion —
+ * importing the module throws `Unexpected 'stylex.defineVars' call at runtime`
+ * before a single case runs, which is the louder failure of the two
+ * (milestone 23, ruling 1).
  */
 describe("the StyleX build integration", () => {
 	it("compiles stylex.props into a class name", () => {