feat(web): drop material gloss, full punktfunk theme for Scalar, center mobile tabs

- console: remove @unom/ui's specular "material" gloss (drop UnomProviders +
  the material.css import) so components render flat like the marketing site;
  the violet brand + Geist stay.
- mobile bottom tab bar: center the labels (w-full text-center, leading-tight)
  and even out the per-tab layout.
- docs /api: roll the punktfunk dark-violet palette across the whole Scalar
  reference (surfaces/text/sidebar/links/buttons/method colours via the full
  --scalar-* token set), locked to dark (hideDarkModeToggle).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/README.md

@@ -7,7 +7,7 @@ clients, the pairing-PIN flow, and session controls.
 Stack: **TanStack Start** (full SSR) on **Bun** via **Nitro v2** (`bun` preset) · **React
 Query** through **orval** codegen from the OpenAPI spec · **[`@unom/ui`](https://git.unom.io/unom/ui)**
 — the shared punktfunk/unom design system the marketing site + docs are built on (Tailwind v4,
-animated components + specular "material" gloss, the violet brand on dark chrome) ·
+animated components on the violet brand over dark chrome) ·
 **Paraglide** i18n (en/de). Package manager + runtime: **Bun**.
 
 The `@unom` registry mapping lives in [`.npmrc`](.npmrc); the auth token comes from
@@ -98,7 +98,6 @@ src/
   components/
     app-shell.tsx    sidebar nav (brand lens + wordmark) + language switcher
     brand-mark/wordmark/logo.tsx   punktfunk lens mark + wordmark (shared with the site/docs)
-    unom-providers.tsx   @unom/ui Material provider (specular gloss; no sounds, like the site)
     ui/              @unom/ui-backed primitives (button, input, label, card; badge/table/skeleton)
     query-state.tsx  loading/error wrapper (incl. 401 → "set a token")
   api/