refactor(packaging): split into dispatch/dispatch-systemd/dispatch-s6, separate dispatch-electron, add bun-based frontend serve

PKGBUILD is now a split package producing three .pkg.tar.zst files in one
makepkg run:
  - dispatch          base application files (/opt/dispatch), CLI wrappers
                       (dispatch-api, dispatch-frontend), env configs
                       (/etc/dispatch/dispatch-api.conf,
                        /etc/dispatch/dispatch-frontend.conf)
  - dispatch-systemd  systemd user units for dispatch-api + dispatch-frontend
                       (conflicts with dispatch-s6)
  - dispatch-s6       s6-rc service pipelines (-srv + -log) for both services
                       (conflicts with dispatch-systemd)

The Electron desktop wrapper moved to its own self-contained PKGBUILD at
packaging/electron/, producing dispatch-electron. It bundles its own copy of
the frontend dist + electron entry points under /opt/dispatch-electron and
does not depend on the base dispatch package, so users can install it
standalone and point VITE_API_URL at any backend at build time.

Files under packaging/ are now read directly from ${_projectdir}/packaging/
rather than via source=(); the two s6 service dirs share basenames (run,
type) which would collide inside ${srcdir}.

New frontend static server: packages/frontend/serve.ts uses Bun's built-in
HTTP server (no extra runtime deps) with SPA fallback to index.html and
path-traversal protection. PORT/HOST/DIST_DIR overridable via env. Exposed
as 'bun run --cwd packages/frontend serve' and via /usr/bin/dispatch-frontend.

Build scripts:
  - bin/build-pkg            now prints the freshest built packages
  - bin/install-pkg          installs dispatch + dispatch-systemd by default;
                              accepts package names or --all; searches both
                              packaging/ and packaging/electron/
  - bin/build-pkg-electron   new, builds the electron split
  - bin/build-pkg-windows    replaces bin/windows-pkg; drops the hard-coded
                              WSL copy step, just prints the win-unpacked path

.gitignore extended to cover packaging/*.tar.zst and packaging/electron/{src,pkg,*.pkg.tar.zst,*.tar.zst}.

1 files changed, 22 insertions, 7 deletions

diff --git a/packaging/dispatch.install b/packaging/dispatch.install
index 7d1439f..76837f5 100644
--- a/packaging/dispatch.install
+++ b/packaging/dispatch.install
@@ -1,16 +1,31 @@
 post_install() {
 	echo ""
-	echo "==> Dispatch has been installed."
-	echo "    Edit /etc/dispatch/dispatch-api.conf to configure the API."
-	echo "    Then enable and start the service:"
-	echo "      systemctl --user enable --now dispatch-api"
+	echo "==> Dispatch (base) has been installed."
+	echo "    Application files: /opt/dispatch"
+	echo "    Config:"
+	echo "      /etc/dispatch/dispatch-api.conf"
+	echo "      /etc/dispatch/dispatch-frontend.conf"
+	echo ""
+	echo "    Run manually:"
+	echo "      dispatch-api          # backend (port 18390 by default)"
+	echo "      dispatch-frontend     # static frontend (port 18391 by default)"
+	echo ""
+	echo "    To run as a service, install one of:"
+	echo "      pacman -S dispatch-systemd   # systemd user services"
+	echo "      pacman -S dispatch-s6        # s6 services (Artix)"
+	echo ""
+	echo "    For the Electron desktop wrapper:"
+	echo "      pacman -S dispatch-electron"
 	echo ""
 }
 
 post_upgrade() {
 	echo ""
-	echo "==> Dispatch has been upgraded."
-	echo "    You may need to restart the service:"
-	echo "      systemctl --user restart dispatch-api"
+	echo "==> Dispatch (base) upgraded."
+	echo "    If you use dispatch-systemd, restart the units:"
+	echo "      systemctl --user restart dispatch-api dispatch-frontend"
+	echo "    If you use dispatch-s6, restart the services:"
+	echo "      s6-svc -r /run/service/dispatch-api"
+	echo "      s6-svc -r /run/service/dispatch-frontend"
 	echo ""
 }