omer-faruq/appstore.koplugin v1.13.0 on GitHub

Download plugins through a GitHub mirror or proxy — pick the source from the menu, or set a custom URL prefix (useful where GitHub is slow or blocked). (#31, thanks @THE-XSX)
The custom download source can be set either in appstore_configuration.lua or in the UI; edits to the file are picked up again after you change it.
Cache refreshes now show a progress bar naming the current stage, and can be stopped partway. (#27, thanks @iav)
Hungarian translation added. (#29, thanks @koma52)
All seven translations (tr, zh_CN, de, es, fr, hu, pt_BR) are now complete.

An abandoned update no longer redirects the next install into the previous plugin's folder — the cause of plugins being silently overwritten by an unrelated one.
An install now refuses to overwrite a directory that already belongs to a different plugin, and says which one.
When the archive's folder name and your install record disagree, AppStore asks which directory to use instead of guessing.

Opening the plugin list no longer decodes every cached repository — only the rows on screen (11.8 s of a 19.7 s open on a Kindle 3 with 1465 repos cached went into rows nobody sees). (#26, thanks @iav)
Non-touch devices: moving the D-pad cursor repaints only a bar on the focused row instead of the whole dialog — 1.23 s → 67 ms per step on a Kindle 3. (#25, thanks @iav)
The plugin list is no longer rebuilt when only patch data changed.
Lower memory use: parsed _meta.lua tables are no longer kept alive for every installed plugin.

Every network call now has a deadline; a server that opens a connection and then goes silent no longer freezes the interface until KOReader is restarted. (#27, thanks @iav)
A failed request no longer leaves KOReader's global socket timeouts raised for every other network call. (#27, thanks @iav)
Losing Wi-Fi halfway through a refresh no longer replaces the cache with the partial result (previously 1479 cached repositories could be cut to the 300 that arrived first). (#27, thanks @iav)
Downloaded archives are closed on every exit path, so failed downloads no longer leave a file handle open and the temporary file behind. (#27, thanks @iav)
Errors now report why a request failed instead of a generic "request failed", and a Lua error is no longer labelled as an HTTP status. (#27, thanks @iav)
The Back key closes AppStore's dialogs. (#25, thanks @iav)
Fixed the custom mirror prefix dialog (and two other input dialogs) rendering with no buttons at all.

Thanks to @iav, @koma52, @THE-XSX and @ksaMask123 for their contributions to this release.