fix(website): unbreak TS build (AnalyticsSurface + Button anchorAttrs) (#274)

* fix(website): add 'home_whitepaper' to AnalyticsSurface

WhitePaperBlock.tsx passes 'home_whitepaper' as the surface property
when tracking signup submissions, but the AnalyticsSurface union did
not include that value — causing TS2322 build failures on main since
the Statusbrew website refactor landed (#270).

This is blocking unrelated PRs from merging because Website lint is a
required check.

* fix(website): remove redundant cast that re-introduces href on anchorAttrs

The 'rest as AnchorButtonProps' cast on line 115 contradicted the prior
destructure on line 106 that pulled 'href' out — TS then inferred that
anchorAttrs still had 'href', conflicting with the explicit href={href}
JSX prop. Result: TS2783 'href is specified more than once' build
failure since the Statusbrew website refactor (#270).

Removing the redundant cast lets TS infer anchorAttrs from the runtime-
true type (rest without href).

Author: blove

apps/website/src/components/ui/Button.tsx

@@ -112,7 +112,7 @@ export function Button(props: ButtonProps) {
       className: _cn,
       style: _st,
       ...anchorAttrs
-    } = rest as AnchorButtonProps;
+    } = rest;
     return (
       <a
         href={href}

apps/website/src/lib/analytics/events.ts

@@ -26,6 +26,7 @@ export type AnalyticsSurface =
   | 'mobile_nav'
   | 'footer'
   | 'home'
+  | 'home_whitepaper'
   | 'pricing'
   | 'docs'
   | 'library_landing'