0.9.0 — Mobile navigation fix

Below 880px the header did .navlinks { display: none } with nothing to replace it, so on phones the whole nav bar — every page link — simply vanished. Only the brand and "Book a demo" survived. This restores navigation with a hamburger drawer.

The fix

• nav.js (shared) injects the toggle. wire() now creates a hamburger button in the header and toggles a .nav-open class on .top. No template changes anywhere — one shared file gives every framed page the drawer. It's idempotent, closes on navigate / outside-click / Escape / resize back to desktop, and is delegated so it works with the dynamically-rendered menu.
• Drawer CSS. Below 880px .navlinks becomes an absolutely-positioned drawer under the header, shown only when .top.nav-open. The Risk Scenarios group expands inline (no hover dropdown on touch). Appended to all eight top-level stylesheets and, for the homepage, added as a nav-mobile.css site style in the 0.9.0 snapshot.

Why a new snapshot

The homepage is the frozen latest version page, and its nav.js + header CSS come from the version chain. src/v0/v0.9/v0.9.0/ layers the updated nav.js and the nav-mobile.css, and inherits everything else (template, dropdown, RAMM band, scenarios link) from 0.8.0. Pointing latest at 0.9.0 ships the fix to the homepage; top-level pages get the same nav.js via HEAD immediately. Older frozen snapshots keep their old behaviour — they're historical.

Guarding it

Smoke adds a mobile-nav group: the hamburger is injected, opening sets .nav-open + aria-expanded, tapping a nav link closes it, and the homepage carries the toggle too. (Layout/breakpoint itself isn't exercised in jsdom, but the open/close plumbing is.)