Ventic v0.2.2

A white screen now explains itself

Ventic's interface is one JavaScript bundle, and a webview too old to read it
paints nothing at all - so on some Android TV boxes the app opened to a blank
screen with nothing to go on (#5).

This release adds a diagnostics screen that runs before the app does, written
in the oldest JavaScript there is so that it still works where the app doesn't.
When Ventic fails to start you now get:

• the version of Android System WebView the device has, and whether it is new
  enough — Ventic needs Chrome 111 or newer
• which of the features it relies on are missing, each with the version that
  added it
• whatever error actually stopped it, with the file and the line

It stays out of the way otherwise: it only appears when nothing has been drawn,
and takes itself back down if a slow device catches up. The arrow keys scroll
it, so it can be read from a remote.

This doesn't make an old webview any newer. It replaces a blank screen with an
answer — if Ventic opens to nothing on your device, install this version and
photograph what it says. That is the whole bug report.

Also

• A permanent APK link. releases/latest/download/Ventic.apk always points at
  the newest build, for sideloading with Downloader on a television.