The Store tab showed nothing until the Modules API key was set, and
pulled the whole catalogue at once. With xcvm_core 2.4.0 it asks the
store for one page (page, per_page, search, sort) with or without a
key; with a key the store says which paid modules the user owns, so
the per-module plugins_check calls go. module_store takes and answers
the paging fields; the page searches (debounced), sorts by name,
popularity, date or price and pages on the server, and keeps only the
latest answer. Free modules install, paid ones not bought link to the
store. Answers are cached 120 s per key and request; a failed one is
not. An older extension keeps the old full list (key required), paged
locally.
ModuleStore reads the catalogue from the core extension
(XC_VM::extensions_list) and asks XC_VM::plugins_check whether the
Modules API key bought each paid module. Every module is listed, marked
free, purchased or paid, with what is installed of it here, matched by
the manifest's update.slug. Cached 5 minutes per API key; a store that
did not answer is not cached.
Divarion_D