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/messages/en/docs/settings/show-version-information.json

@@ -0,0 +1,81 @@
+{
+  "meta": {
+    "title": "Show Version Information | ProxMenux Documentation",
+    "description": "Read-only ProxMenux self-diagnostic: version number, install type (Translation / Normal), installed components from config.json, file paths, virtual environment state and current language.",
+    "ogTitle": "Show Version Information | ProxMenux Documentation",
+    "ogDescription": "Diagnostic dump of ProxMenux version, install type, components, files and language."
+  },
+  "header": {
+    "title": "Show Version Information",
+    "description": "Read-only diagnostic. Reads version.txt, config.json and a few well-known file paths, then renders a scrollable text box with version, install type, installed components, file presence, virtual environment state and current language.",
+    "section": "Settings"
+  },
+  "intro": {
+    "title": "What this is",
+    "body": "A self-diagnostic. Useful when reporting an issue (paste the dialog contents into the bug report) or to confirm an install completed cleanly. Modifies nothing."
+  },
+  "reports": {
+    "heading": "What it reports",
+    "headerSection": "Section",
+    "headerSource": "Source",
+    "headerContent": "Content",
+    "rows": [
+      {
+        "section": "Current version",
+        "source": "version.txt",
+        "contentRich": "Single-line version number; <code>Unknown</code> if file missing"
+      },
+      {
+        "section": "Install type",
+        "source": "venv + config.json checks",
+        "content": "Translation (multi-language) or Normal (English-only)"
+      },
+      {
+        "section": "Installed components",
+        "source": "config.json",
+        "content": "Per-component status (✓ installed / created / upgraded, ✗ missing)"
+      },
+      {
+        "section": "ProxMenux files",
+        "source": "filesystem checks",
+        "contentRich": "<code>menu</code>, <code>utils.sh</code>, <code>config.json</code>, <code>version.txt</code> presence + paths"
+      },
+      {
+        "section": "Virtual environment",
+        "source": "/opt/googletrans-env",
+        "content": "Translation install only — venv + pip presence"
+      },
+      {
+        "section": "Current language",
+        "source": "config.json",
+        "contentRich": "Translation: language code from <code>.language</code>; Normal: <code>English (Fixed)</code>"
+      }
+    ]
+  },
+  "sampleHeading": "Sample output",
+  "manualHeading": "Manual equivalents",
+  "troubleshoot": {
+    "heading": "Troubleshooting",
+    "unknownTitle": "Version shows \"Unknown\"",
+    "unknownBody": "<code>/usr/local/share/proxmenux/version.txt</code> is missing or unreadable. Most often caused by a partial install. Reinstall from the official ProxMenux source.",
+    "noConfigTitle": "No installation information available",
+    "noConfigBody": "<code>config.json</code> is missing. The script can't enumerate components without it. Reinstall to regenerate.",
+    "wrongStatusTitle": "A component shows ✗ that I'm sure I installed",
+    "wrongStatusBody": "Means <code>config.json</code> doesn't track that component as installed — could be a script that doesn't register itself yet, or a manual install that bypassed ProxMenux. The dialog reflects what <code>config.json</code> says, not what's actually on disk."
+  },
+  "related": {
+    "heading": "Related",
+    "items": [
+      {
+        "href": "/docs/settings/uninstall-proxmenux",
+        "label": "Uninstall ProxMenux",
+        "tail": " — remove all of these files."
+      },
+      {
+        "href": "/docs/settings",
+        "label": "Settings overview",
+        "tail": "."
+      }
+    ]
+  }
+}