fix(pro): add www→non-www redirect and clean stale Turnstile attributes (#1198)

- Add 301 redirect from www.worldmonitor.app to worldmonitor.app in
  vercel.json to fix Turnstile domain mismatch (site key only allows
  non-www) causing 403 on form submit.
- Remove stale data-sitekey/theme/size attributes from footer
  .cf-turnstile div (explicit rendering sets these via render()).

vercel.json

@@ -1,6 +1,9 @@
 {
   "ignoreCommand": "if [ -z \"$VERCEL_GIT_PREVIOUS_SHA\" ]; then exit 1; fi; git cat-file -e $VERCEL_GIT_PREVIOUS_SHA 2>/dev/null || exit 1; git diff --quiet $VERCEL_GIT_PREVIOUS_SHA HEAD -- ':!*.md' ':!.planning' ':!docs/' ':!e2e/' ':!scripts/' ':!.github/'",
   "crons": [],
+  "redirects": [
+    { "source": "/:path(.*)", "has": [{ "type": "host", "value": "www.worldmonitor.app" }], "destination": "https://worldmonitor.app/:path", "permanent": true }
+  ],
   "rewrites": [
     { "source": "/pro", "destination": "/pro/index.html" },
     { "source": "/((?!api|assets|favico|map-styles|data|textures|pro|sw\\.js|manifest\\.webmanifest|offline\\.html|robots\\.txt|sitemap\\.xml|llms\\.txt|llms-full\\.txt|\\.well-known).*)", "destination": "/index.html" }