docs(help-osk): split remote-access into Windows/iOS pages + Android-macOS-FAQ

Replace the single remote-access page with updated, screenshot-driven
manuals staged by the operator:
- remote-access-windows.md — Win10, Remote Desktop, terminal.osk.team:1406
- remote-access-ios.md — new Windows App Mobile flow (iOS 26.0+)
Retain Android + macOS (Parallels) + FAQ as remote-access-other.md,
updating the placeholder host to terminal.osk.team. Nav grouped under a
'Удалённый доступ' section; index.md updated.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

help-osk-docs/zensical.toml

@@ -15,7 +15,11 @@ Copyright © 2026 ОСК
 # Remove this block to let Zensical derive the nav from the folder structure.
 nav = [
   { "Главная" = "index.md" },
-  { "Удалённый доступ" = "remote-access.md" },
+  { "Удалённый доступ" = [
+    { "Windows 10" = "remote-access-windows.md" },
+    { "iOS" = "remote-access-ios.md" },
+    { "Android и macOS" = "remote-access-other.md" },
+  ] },
   { "Почта Exchange (Outlook)" = "exchange-outlook.md" },
   { "Почта Exchange (штатное ПО)" = "exchange-native.md" },
   { "FTP-сервер" = "ftp.md" },