docs: promote /web from develop for backup-restore, Log2RAM and Network Flow guides

Brings 69 files from develop under /web/:
- Full Backup & Restore section (11 pages EN + ES: overview, how-it-works, destinations,
  creating backups, scheduled jobs, restoring, cross-kernel hydration)
- Log2RAM dedicated block in post-install/optional with commands + upstream link
- Network Flow diagram documented on monitor/dashboard/network
- Rewritten category descriptions in post-install/customizable
- Fixed automated.json thresholds + link to Log2RAM section
- Updated screenshots (network-flow-overview, storage-top-row, vms modals)

No code, config or AppImage binaries touched — /web/ scope only. Merging deploys
the documentation site to the current beta release notes.

web/app/[locale]/changelog/page.tsx

@@ -12,14 +12,16 @@ import CopyableCode from "@/components/CopyableCode"
 
 // Resolve which CHANGELOG.md to read for the given locale. The canonical
 // English file lives at the repo root (so GitHub displays it as-is and
-// existing RSS / external consumers don't break). Localized versions
-// sit under <repo>/lang/<locale>/CHANGELOG.md. Falls back to English if
-// the localized file doesn't exist yet — so a partially-translated
-// changelog still renders (in EN) instead of 404'ing.
+// existing RSS / external consumers don't break). Localized versions sit
+// under <repo>/web/data/changelog/<locale>.md — separate from the
+// /lang/ directory which is now reserved for runtime translation JSON
+// shipped to the host install. Falls back to English if the localized
+// file doesn't exist yet — so a partially-translated changelog still
+// renders (in EN) instead of 404'ing.
 function resolveChangelogPath(locale: string): string {
   const repoRoot = path.join(process.cwd(), "..")
   if (locale && locale !== "en") {
-    const localized = path.join(repoRoot, "lang", locale, "CHANGELOG.md")
+    const localized = path.join(process.cwd(), "data", "changelog", `${locale}.md`)
     if (fs.existsSync(localized)) return localized
   }
   return path.join(repoRoot, "CHANGELOG.md")