Extend the spa-routes skill so agents catch all `.desktop` colocated
variants under `src/routes/`, not just the desktopRouter pair. Adds a
new "3b. Other .desktop variants" section listing the current known
cases (settings componentMap, agent index, group index), spells out
the drift risk for each, and lists the rules for editing/adding/
removing variant pairs. Also updates the skill description so the
trigger glob covers `componentMap.desktop`, `index.desktop.tsx`, and
`.desktop.tsx variant`.
Innei
1736faf3af