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/monitor/dashboard/page.tsx

@@ -0,0 +1,120 @@
+import type { Metadata } from "next"
+import { getTranslations, getMessages, setRequestLocale } from "next-intl/server"
+import { Link } from "@/i18n/navigation"
+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.monitor.dashboard.meta" })
+  return {
+    title: t("title"),
+    description: t("description"),
+  }
+}
+
+type TabRow = { name: string; linksTo?: string; owns: string }
+type WhereNextItem = { label: string; href: string; tail: string }
+
+export default async function DashboardIndexPage({
+  params,
+}: {
+  params: Promise<{ locale: string }>
+}) {
+  const { locale } = await params
+  setRequestLocale(locale)
+  const t = await getTranslations({ locale, namespace: "docs.monitor.dashboard" })
+
+  const messages = (await getMessages({ locale })) as unknown as {
+    docs: { monitor: { dashboard: {
+      tabs: { rows: TabRow[] }
+      headerAnatomy: { items: string[] }
+      whereNext: { items: WhereNextItem[] }
+    } } }
+  }
+  const tabRows = messages.docs.monitor.dashboard.tabs.rows
+  const headerAnatomyItems = messages.docs.monitor.dashboard.headerAnatomy.items
+  const whereNextItems = messages.docs.monitor.dashboard.whereNext.items
+
+  const code = (chunks: React.ReactNode) => <code>{chunks}</code>
+  const strong = (chunks: React.ReactNode) => <strong>{chunks}</strong>
+  const em = (chunks: React.ReactNode) => <em>{chunks}</em>
+  const link = (chunks: React.ReactNode) => (
+    <Link href="/docs/monitor/health-monitor" className="text-blue-700 hover:underline">
+      {chunks}
+    </Link>
+  )
+
+  return (
+    <div>
+      <DocHeader
+        title={t("header.title")}
+        description={t("header.description")}
+        section={t("header.section")}
+        estimatedMinutes={3}
+      />
+
+      <Callout variant="info" title={t("oneHeader.title")}>
+        {t.rich("oneHeader.body", { link })}
+      </Callout>
+
+      <h2 className="text-2xl font-semibold mt-10 mb-4 text-gray-900">{t("tabs.heading")}</h2>
+      <p className="mb-4 text-gray-800 leading-relaxed">{t("tabs.intro")}</p>
+
+      <div className="overflow-x-auto mb-6">
+        <table className="w-full text-sm border border-gray-200 rounded-md">
+          <thead className="bg-gray-50 text-gray-900">
+            <tr>
+              <th className="text-left px-3 py-2 border-b border-gray-200">{t("tabs.headerTab")}</th>
+              <th className="text-left px-3 py-2 border-b border-gray-200">{t("tabs.headerOwns")}</th>
+            </tr>
+          </thead>
+          <tbody className="text-gray-800">
+            {tabRows.map((row, idx) => (
+              <tr
+                key={row.name}
+                className={idx < tabRows.length - 1 ? "border-b border-gray-100" : ""}
+              >
+                <td className="px-3 py-2 align-top whitespace-nowrap">
+                  {row.linksTo ? (
+                    <Link href={row.linksTo} className="text-blue-600 hover:underline font-semibold">
+                      {row.name}
+                    </Link>
+                  ) : (
+                    <strong>{row.name}</strong>
+                  )}
+                </td>
+                <td className="px-3 py-2 align-top">
+                  {t.rich(`tabs.rows.${idx}.owns`, { code })}
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+
+      <h2 className="text-2xl font-semibold mt-10 mb-4 text-gray-900">{t("headerAnatomy.heading")}</h2>
+      <ul className="list-disc pl-6 mb-6 text-gray-800 leading-relaxed space-y-1">
+        {headerAnatomyItems.map((_, idx) => (
+          <li key={idx}>{t.rich(`headerAnatomy.items.${idx}`, { code, strong, em })}</li>
+        ))}
+      </ul>
+
+      <h2 className="text-2xl font-semibold mt-10 mb-4 text-gray-900">{t("whereNext.heading")}</h2>
+      <ul className="list-disc pl-6 text-gray-800 leading-relaxed space-y-1">
+        {whereNextItems.map((item) => (
+          <li key={item.href}>
+            <Link href={item.href} className="text-blue-600 hover:underline">
+              {item.label}
+            </Link>
+            {item.tail}
+          </li>
+        ))}
+      </ul>
+    </div>
+  )
+}