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/app/[locale]/docs/external-repositories/page.tsx

@@ -0,0 +1,119 @@
+import type { Metadata } from "next"
+import { getTranslations, getMessages, setRequestLocale } from "next-intl/server"
+import { DocHeader } from "@/components/ui/doc-header"
+import { Callout } from "@/components/ui/callout"
+
+export async function generateMetadata({ params }: { params: Promise<{ locale: string }> }): Promise<Metadata> {
+  const { locale } = await params
+  const t = await getTranslations({ locale, namespace: "docs.externalRepositories.meta" })
+  return {
+    title: t("title"),
+    description: t("description"),
+    openGraph: {
+      title: t("ogTitle"),
+      description: t("ogDescription"),
+      type: "article",
+      url: "https://macrimi.github.io/ProxMenux/docs/external-repositories",
+    },
+  }
+}
+
+type RepoItem = { name: string; url: string; description: string; usedIn: string }
+
+export default async function ExternalRepositoriesPage({ params }: { params: Promise<{ locale: string }> }) {
+  const { locale } = await params
+  setRequestLocale(locale)
+  const t = await getTranslations({ locale, namespace: "docs.externalRepositories" })
+
+  const messages = (await getMessages({ locale })) as unknown as {
+    docs: {
+      externalRepositories: {
+        integrated: { items: RepoItem[] }
+        attribution: { items: string[] }
+        candidate: { items: string[] }
+      }
+    }
+  }
+  const block = messages.docs.externalRepositories
+  const repos = block.integrated.items
+  const attributionItems = block.attribution.items
+  const candidateItems = block.candidate.items
+
+  const strong = (chunks: React.ReactNode) => <strong>{chunks}</strong>
+
+  return (
+    <div>
+      <DocHeader
+        title={t("header.title")}
+        description={t("header.description")}
+        section={t("header.section")}
+        estimatedMinutes={3}
+      />
+
+      <Callout variant="info" title={t("practice.title")}>
+        {t("practice.body")}
+      </Callout>
+
+      <h2 className="text-2xl font-semibold mt-10 mb-4 text-gray-900">{t("integrated.heading")}</h2>
+      <div className="space-y-4 mb-8">
+        {repos.map((r) => (
+          <a
+            key={r.url}
+            href={r.url}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="block rounded-md border border-gray-200 bg-white p-4 transition-colors hover:border-blue-400 hover:bg-blue-50"
+          >
+            <div className="font-semibold text-gray-900 mb-1">{r.name}</div>
+            <div className="text-sm text-gray-700 leading-snug mb-2">{r.description}</div>
+            <div className="text-xs text-gray-500">
+              <strong>{t("integrated.usedInLabel")}</strong> {r.usedIn}
+            </div>
+          </a>
+        ))}
+      </div>
+
+      <h2 className="text-2xl font-semibold mt-10 mb-4 text-gray-900">{t("attribution.heading")}</h2>
+      <ul className="list-disc pl-6 mb-6 text-gray-800 leading-relaxed space-y-1">
+        {attributionItems.map((_, idx) => (
+          <li key={idx}>{t(`attribution.items.${idx}`)}</li>
+        ))}
+      </ul>
+
+      <Callout variant="warning" title={t("report.title")}>
+        {t.rich("report.body", { strong })}
+      </Callout>
+
+      <h2 className="text-2xl font-semibold mt-10 mb-4 text-gray-900">{t("suggest.heading")}</h2>
+      <p className="mb-4 text-gray-800 leading-relaxed">{t("suggest.intro")}</p>
+      <div className="grid gap-3 md:grid-cols-2 mb-6 not-prose">
+        <a
+          href="https://github.com/MacRimi/ProxMenux/discussions"
+          target="_blank"
+          rel="noopener noreferrer"
+          className="block rounded-md border border-gray-200 bg-white p-4 transition-colors hover:border-blue-400 hover:bg-blue-50"
+        >
+          <div className="font-semibold text-gray-900 mb-1">{t("suggest.discussionTitle")}</div>
+          <div className="text-xs text-gray-600">{t("suggest.discussionBody")}</div>
+        </a>
+        <a
+          href="https://github.com/MacRimi/ProxMenux/issues"
+          target="_blank"
+          rel="noopener noreferrer"
+          className="block rounded-md border border-gray-200 bg-white p-4 transition-colors hover:border-blue-400 hover:bg-blue-50"
+        >
+          <div className="font-semibold text-gray-900 mb-1">{t("suggest.issueTitle")}</div>
+          <div className="text-xs text-gray-600">{t("suggest.issueBody")}</div>
+        </a>
+      </div>
+
+      <Callout variant="tip" title={t("candidate.title")}>
+        <ul className="list-disc pl-6 mb-0 space-y-1">
+          {candidateItems.map((_, idx) => (
+            <li key={idx}>{t(`candidate.items.${idx}`)}</li>
+          ))}
+        </ul>
+      </Callout>
+    </div>
+  )
+}