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/rss-link.tsx

@@ -3,10 +3,20 @@
 import { Rss, Copy, Check } from "lucide-react"
 import Link from "next/link"
 import { useState } from "react"
+import { useLocale, useTranslations } from "next-intl"
 
 export default function RSSLink() {
   const [copied, setCopied] = useState(false)
-  const rssUrl = "https://proxmenux.com/rss.xml"
+  const locale = useLocale()
+  const t = useTranslations("rssLink")
+
+  // English keeps the existing root /rss.xml endpoint for backwards
+  // compatibility with existing subscribers; other locales use the
+  // per-locale feed served from app/[locale]/rss.xml/route.ts.
+  const rssUrl =
+    locale === "en"
+      ? "https://proxmenux.com/rss.xml"
+      : `https://proxmenux.com/${locale}/rss.xml`
 
   const copyToClipboard = async () => {
     try {
@@ -22,11 +32,10 @@ export default function RSSLink() {
     <div className="mb-8 p-4 bg-orange-50 border border-orange-200 rounded-lg">
       <div className="space-y-3">
         <div>
-          <h3 className="text-lg font-semibold text-orange-900 mb-1">Stay Updated!</h3>
-          <p className="text-orange-700 text-sm">Subscribe to our RSS feed to get notified of new changes.</p>
+          <h3 className="text-lg font-semibold text-orange-900 mb-1">{t("heading")}</h3>
+          <p className="text-orange-700 text-sm">{t("body")}</p>
         </div>
 
-        {/* RSS URL and buttons - Responsive layout */}
         <div className="space-y-2">
           <div className="flex items-center gap-2">
             <code className="bg-orange-100 text-orange-800 px-2 py-1 rounded text-xs flex-1 min-w-0 truncate">
@@ -35,10 +44,10 @@ export default function RSSLink() {
             <button
               onClick={copyToClipboard}
               className="flex items-center gap-1 px-2 py-1 bg-gray-600 text-white rounded hover:bg-gray-700 transition-colors text-xs whitespace-nowrap"
-              title="Copy RSS URL"
+              title={t("copyTitle")}
             >
               {copied ? <Check className="h-3 w-3" /> : <Copy className="h-3 w-3" />}
-              <span className="hidden sm:inline">{copied ? "Copied!" : "Copy"}</span>
+              <span className="hidden sm:inline">{copied ? t("copied") : t("copy")}</span>
             </button>
           </div>
 
@@ -47,10 +56,10 @@ export default function RSSLink() {
             className="inline-flex items-center justify-center space-x-2 px-4 py-2 bg-orange-600 text-white rounded-lg hover:bg-orange-700 transition-colors w-full sm:w-auto"
             target="_blank"
             rel="noopener noreferrer"
-            title="Open RSS Feed"
+            title={t("openTitle")}
           >
             <Rss className="h-4 w-4" />
-            <span>Open RSS Feed</span>
+            <span>{t("openFeed")}</span>
           </Link>
         </div>
       </div>