docs(links): five See Also links had no text at all

A generated See Also pass left `- ](index.md)` style links on the gitea pages, tools/cachyos.md,
and tools/applications.md. Rendered, an empty-text link is a bullet with nothing clickable in it,
so it reads as a formatting quirk and never as the broken reference it is. All five now name the
page they point at and use the absolute bundle path the spec recommends; the grep that finds them
is recorded in the log so the sweep is repeatable.

Refs #64

omp-docs/tools/cachyos.md

@@ -106,7 +106,7 @@ CachyOS with Niri ships with a curated set of applications:
 
 ## See Also
 
-- ](../system/index.md) — system overview
+- [System hosts](/system/index.md) — the fleet's machines and roles
 - [niri](niri/index.md) — Compositor documentation
 - [noctalia-shell](/tools/noctalia-shell.md) — Desktop shell documentation
 - [applications](/tools/applications.md) — Application reference