hyper-calendar 2.0.2

The app now has a name, a face, and a way to talk back.

Android and F-Droid

* The app is called **Hyper-Calendar** everywhere a person reads it — launcher,
  PWA manifest, browser tab and the F-Droid listing. Package identifiers are
  unchanged, so this is an ordinary in-place update.
* A real launcher icon. Every density shipped Capacitor's scaffolding artwork
  until now, as did all eleven splash screens. The mark is rendered from SVG
  sources in assets/ via 'npm run icons'.
* Reminder notifications get their own status-bar icon. capacitor.config.ts had
  always named an ic_stat_icon resource that did not exist, so they fell back to
  a generic system glyph.

The F-Droid listing shows images at last

'fdroid update' reads per-app images from fdroid/repo/<applicationId>/<locale>/,
and nothing ever put them there — so the app page had no screenshots, no banner,
and only whatever icon could be scraped from the APK. It now carries an icon, a
feature graphic and four screenshots, generated from the running app by
'npm run screenshots'.

About and feedback, in the app

* Account menu -> About: version, build, deployment mode, licence and links.
  Until now there was nowhere in the app to read the version the issue tracker
  keeps asking reporters for.
* Account menu -> Send feedback: describe what happened and it composes a report
  with the version, deployment mode, platform, browser, locale, timezone and
  window size already filled in, then opens a prefilled GitLab issue. Nothing is
  sent by the app — the diagnostics are shown and editable first, and the issue
  is public.

Documentation

The site is the single source of truth: the repository's markdown is now short
pointers to it, and the site itself finally shows the product.

This is the first release whose APK is built and signed by CI rather than
uploaded by hand. Getting there took two fixes to that job: it died of SIGPIPE
after accepting the SDK licences, and then needed a JDK 21 image, which
Capacitor 8 requires and Debian 12 cannot provide.