feat(packaging): bundle the web console into the RPM / Arch / bootc host packages

The punktfunk-web management console (pairing + status) shipped only via apt. Extend it
to the other HOST packaging methods, mirroring the Debian punktfunk-web .deb (flatpak is
the client, correctly excluded):

- rpm/punktfunk.spec: new noarch `punktfunk-web` subpackage (the .output bundle + a
  /usr/bin/punktfunk-web-server node launcher + both systemd --user units + web-init.sh +
  web.env.example), gated behind `%bcond_with web`. OFF by default because building the
  Nitro/Node SSR bundle needs `bun`, which a plain rpmbuild / COPR mock chroot lacks. Host
  package weak-Recommends punktfunk-web.
- ci/fedora-rpm.Dockerfile: install bun (+ unzip) so the CI builder can build the console.
- rpm.yml: build `PF_WITH_WEB=1` (Prep bootstraps bun to stay green pre-image-rebuild); the
  publish loop already globs the new noarch rpm into the registry. build-rpm.sh: `--with web`
  when PF_WITH_WEB=1.
- bootc/Containerfile: install from the Gitea RPM registry (which carries punktfunk-web)
  instead of COPR — `dnf5 install punktfunk punktfunk-web`.
- arch/PKGBUILD: opt-in `punktfunk-web` split member (PF_WITH_WEB=1 appends it + bun) so a
  default makepkg still builds host+client with no JS tooling — matching the spec's bcond.
- docs: packaging/README, rpm/README, copr/README (the no-bun caveat), bazzite/README
  (Path B rewritten COPR→Gitea registry), arch/README — enable + journal-password steps.

Reviewed across methods by an adversarial multi-agent pass (rpm/ci/arch/bootc/consistency
lenses, each blocking finding 3x-verified); fixed the two it confirmed real — the Arch
bun-mandatory regression (now opt-in) and the stale COPR wording in bazzite Path B.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packaging/rpm/build-rpm.sh

@@ -11,6 +11,10 @@ set -euo pipefail
 
 PF_VERSION="${PF_VERSION:-0.0.1}"
 PF_RELEASE="${PF_RELEASE:-1}"
+# PF_WITH_WEB=1 builds the punktfunk-web subpackage too (needs `bun` on PATH — present in the CI
+# builder image, not in a plain mock chroot). Default off so a bare `rpmbuild`/COPR still works.
+WEB_OPT=()
+[ "${PF_WITH_WEB:-0}" = "1" ] && WEB_OPT=(--with web)
 ROOTDIR="$(cd "$(dirname "$0")/../.." && pwd)"
 cd "$ROOTDIR"
 
@@ -28,7 +32,7 @@ git archive --format=tar.gz --prefix="punktfunk-${PF_VERSION}/" \
 # resolves them from RPMs. Our builder image provides the toolchain via rustup (so
 # rust-toolchain.toml's pinned channel works) and the -devel libs via dnf, neither of which
 # rpmbuild's RPM-level check sees — skip it; a genuinely missing dep fails the compile/link.
-rpmbuild -bb --nodeps \
+rpmbuild -bb --nodeps "${WEB_OPT[@]}" \
   --define "_topdir $TOP" \
   --define "pf_version ${PF_VERSION}" \
   --define "pf_release ${PF_RELEASE}" \