Ship the client behaviors bundle in the html scaffold
The @refrakt-md/html scaffold (create-refrakt template-html) emits static HTML with no client JS — build.ts never bundles or references initPage() from @refrakt-md/html/client. So no interactive behavior runs in a scaffolded html site: tabs, accordion, search, and (since SPEC-073) the theme-toggle button are all inert. The adapter ships the client runtime (@refrakt-md/html/client + @refrakt-md/behaviors); the scaffold just never bundles and includes it.
Discovered while finishing WORK-292: the html adapter now injects the no-flash pre-paint script (which works without JS), but the toggle can't cycle until the behaviors bundle loads. This is broader than the toggle — it's the html scaffold's general interactivity gap.