Group A: source upstream binaries instead of self-built artifacts

The AUR does not allow packages to ship a binary tarball built by the
maintainer - a -bin package must repackage a deliverable published by
upstream. These six packages now do that:

  snapx-bin            upstream's self-contained Linux tar.zst
  zapzap-bin           upstream's pure-Python wheel
  faugus-launcher-bin  upstream's arch-independent .deb
  wiiudownloader-bin   upstream's AppImage
  waydroid-helper-bin  upstream's AppImage
  chiaki-ng-bin        upstream's AppImage

All six drop build_artifact() and switch to refresh_checksums(), so CI no
longer builds or hosts anything - it only tracks upstream's assets.

Where the asset name carries build metadata that does not follow from
pkgver (snapx, faugus-launcher), refresh_checksums() resolves it via the
GitHub API and syncs an _asset variable in the PKGBUILD.

Dependency lists are re-derived from what the bundles actually resolve
outside themselves; the AppImage payloads land in /opt with wrappers in
/usr/bin, because their entry points resolve paths relative to argv[0].

snapx-bin/PKGBUILD

@@ -4,7 +4,7 @@
 
 pkgname=snapx-bin
 pkgver=0.4.0
-pkgrel=1
+pkgrel=2
 pkgdesc="Screenshot tool that handles images, text, and video - ShareX fork, Avalonia UI (upstream binary)"
 arch=('x86_64')
 url="https://github.com/SnapXL/SnapX"
@@ -13,10 +13,32 @@ depends=('glibc' 'gcc-libs' 'hicolor-icon-theme')
 provides=('snapx-ui')
 conflicts=('snapx-ui')
 options=('!strip' '!debug')
-source=("${pkgname}-${pkgver}-${pkgrel}.tar.zst::https://github.com/Felitendo/PKGBUILDS/releases/download/${pkgname}-${pkgver}/${pkgname}-${pkgver}.tar.zst")
-sha256sums=('d2098cac542bca82e68be0a4fa98db22f2d84d35c683d18582382dc9206eb5ee')
+# Upstream asset names embed build metadata that cannot be derived from
+# pkgver, so the exact name is tracked here and refreshed automatically.
+_asset="SnapX-UI-Release-Linux-0.4.0-alpha.0+g7eafb0f-X64.tar.zst"
+source=("${pkgname}-${pkgver}.tar.zst::${url}/releases/download/v${pkgver}/${_asset}"
+        "${pkgname}-${pkgver}-src.tar.gz::${url}/archive/refs/tags/v${pkgver}.tar.gz")
+noextract=("${pkgname}-${pkgver}.tar.zst")
+sha256sums=('1cbecd1caca21e611030eedbb8e5a43cc4bf62d55cfa56a2e5c2ac31b3d21e35' 'd85f4d2c3ea55ed5040f166fdf44ce03dd0270dc6ab05ee26771dbd02eaacc06')
 
 package() {
-  cp -a "$srcdir/usr" "$pkgdir/"
-  cp -a "$srcdir/opt" "$pkgdir/"
+  # upstream's self-contained bundle, installed unchanged
+  install -d "$pkgdir/opt/snapx"
+  bsdtar -xpf "$srcdir/${pkgname}-${pkgver}.tar.zst" -C "$pkgdir/opt/snapx"
+  chmod 755 "$pkgdir/opt/snapx/snapx-ui"
+
+  # upstream's launcher resolves its own directory, so a symlink from
+  # /usr/bin would break it - use a wrapper instead
+  install -d "$pkgdir/usr/bin"
+  cat > "$pkgdir/usr/bin/snapx-ui" << 'EOF'
+#!/bin/sh
+exec /opt/snapx/snapx-ui "$@"
+EOF
+  chmod 755 "$pkgdir/usr/bin/snapx-ui"
+
+  # desktop entry, icons and metainfo ship in the source tree only
+  cp -a "$srcdir/SnapX-${pkgver}/packaging/usr/share" "$pkgdir/usr/"
+
+  install -Dm644 "$pkgdir/opt/snapx/LICENSE.md" \
+    "$pkgdir/usr/share/licenses/$pkgname/LICENSE.md"
 }