Two Phase-2 Store improvements that operators feel
immediately:
- Per-module update badge: store cards compare the operator's
installed version against the index's `best_version`, raise
an "update" pill + "Update to vX.Y.Z" button when newer is
available. Result: a single glance at the Store reveals
what's behind. The page now fetches `listModules` in
parallel with the search so the comparison is on the
current snapshot.
- Inline README rendering: detail sheet has a new
Documentation section. "Load documentation" button (lazy —
no network until clicked) calls FetchModuleDocs and renders
the markdown via flutter_markdown, with the operator's
theme colors and link-tap routed through SystemActions.
Auth / not-found / network failures fall back to a
friendly fix-hint panel + "Open repository in browser"
button so the operator never hits a dead end.
Adds flutter_markdown ^0.7.7 to pubspec; the package is
maintenance-only upstream but is the only mature option
for Material-themed markdown right now. Easy to swap to
markdown_widget if/when we need GitHub-flavored extras.
Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>