fix(snap): update make:snap command to include debug environment variable and remove unnecessary build environment setting

scripts/ci/github-build-linux-snap.sh

@@ -1,16 +1,6 @@
 #!/usr/bin/env bash
 # Build a Snap via electron-forge's @electron-forge/maker-snap.
-#
-# Expects ``meshchatx/public/`` to already contain a prebuilt frontend bundle
-# (downloaded from the reusable Frontend build workflow), so this script only
-# rebuilds the cx_Freeze backend before running ``electron-forge make``.
-#
-# Required system packages (installed by the workflow):
-#   - snapcraft (installed via ``snap install snapcraft --classic``)
-#   - LXD or multipass when building outside ``--use-lxd``/``--destructive-mode``
-#     (electron-forge invokes snapcraft itself; we set
-#     ``SNAPCRAFT_BUILD_ENVIRONMENT=host`` so the snap is built directly on the
-#     runner without needing a build VM).
+
 set -euo pipefail
 
 ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
@@ -27,6 +17,6 @@ pnpm run electron-postinstall
 pnpm run version:sync
 pnpm run build-backend
 
-SNAPCRAFT_BUILD_ENVIRONMENT="${SNAPCRAFT_BUILD_ENVIRONMENT:-host}" \
-FORGE_MAKE_SNAP=1 \
-    node scripts/electron-forge-local-tmp.js make --targets @electron-forge/maker-snap
+export DEBUG="${DEBUG:+$DEBUG,}electron-installer-snap:snapcraft"
+
+FORGE_MAKE_SNAP=1 node scripts/electron-forge-local-tmp.js make --targets @electron-forge/maker-snap