complete i18n migration to /[locale]/ with EN+ES content

Full rewrite of the docs site under app/[locale]/ with next-intl
in localePrefix:"always" mode. Every page now exists at both
/en/<path> and /es/<path>; the root / shows a meta-refresh + JS
redirect to /<defaultLocale>/ so GitHub Pages serves something
on the apex URL.

Highlights:
- 107 doc pages migrated to file-per-page JSON namespaces under
  messages/en/ and messages/es/. Spanish content is fully
  translated (no copy-of-English placeholders).
- New documentation for the Active Suppressions section in the
  Settings tab and the per-event Dismiss dropdown in the Health
  Monitor modal.
- New screenshots: dismiss-duration-dropdown.png and an updated
  health-suppression-settings.png.
- Pagefind integrated for client-side search; index is built on
  every CI deploy (not committed).
- RSS feeds: per-locale at /<locale>/rss.xml plus root /rss.xml
  for backward compat.
- Removed the dead app/[locale]/guides/[slug]/ route — every
  guide now has its own static page and no markdown source
  remains.
- Fixed orphan link /guides/nvidia -> /guides/nvidia-manual in
  docs/hardware/nvidia-host.
- Removed obsolete components (footer2, calendar, drawer).

Verified locally with `npm ci && npm run build`: 2804 files in
out/, 231 pages indexed by pagefind, root redirect intact, both
locale roots and the new Active Suppressions docs render OK.

web/components/support-project.tsx

@@ -2,8 +2,10 @@
 
 import { Button } from "@/components/ui/button"
 import { Star } from "lucide-react"
+import { useTranslations } from "next-intl"
 
 export default function SupportProject() {
+  const t = useTranslations("supportProject")
   const handleClick = () => {
     window.open("https://github.com/MacRimi/ProxMenux", "_blank")
   }
@@ -11,15 +13,16 @@ export default function SupportProject() {
   return (
     <section className="py-16 bg-gray-900">
       <div className="container mx-auto px-4 text-center">
-        <h2 className="text-3xl font-bold mb-6">Support the Project!</h2>
+        <h2 className="text-3xl font-bold mb-6">{t("heading")}</h2>
         <p className="text-xl mb-8">
-          If you find <span className="font-bold">ProxMenux</span> useful, consider giving it a ⭐ on GitHub to help
-          others discover it!
+          {t.rich("body", {
+            strong: (chunks) => <span className="font-bold">{chunks}</span>,
+          })}
         </p>
         <div className="flex justify-center items-center">
           <Button className="bg-yellow-400 text-gray-900 hover:bg-yellow-500" onClick={handleClick}>
             <Star className="mr-2" />
-            Star on GitHub
+            {t("button")}
           </Button>
         </div>
       </div>