packaging: dev-sync.sh background loop for seamless live VM preview

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

packaging/dev-sync.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+# dev-sync.sh — background loop for the live VM preview. Copies the fork's QML
+# from the 9p mount (/mnt/fork) into the LOCAL quickshell config so quickshell's
+# file-watcher (settings.watchFiles) auto-reloads on host-side edits. 9p doesn't
+# propagate inotify, so we poll + copy to a local dir where inotify works.
+#
+# Run once in the VM (after dev-mount.sh has set up the local config copy):
+#   setsid sh /mnt/fork/packaging/dev-sync.sh >/dev/null 2>&1 &
+#
+# Then just edit the fork on the HOST — the VM shell reloads within ~2s.
+set -eu
+SRC=/mnt/fork
+DST="$HOME/.config/quickshell/caelestia"
+
+[ -e "$SRC/shell.qml" ] || { echo "9p fork not mounted at $SRC" >&2; exit 1; }
+[ -d "$DST" ] || { echo "$DST is not a local dir — run dev-mount.sh's local-copy step first" >&2; exit 1; }
+
+while true; do
+  for d in shell.qml modules components services utils assets; do
+    [ -e "$SRC/$d" ] && cp -ru "$SRC/$d" "$DST/" 2>/dev/null || true
+  done
+  sleep 1.5
+done