Hands: the recorder's host commands run from the home folder

host-spawn starts a host command in the caller's folder. Started from /tmp,
the app's folder in the container is /run/host/tmp, which the host doesn't
have, so starting ft-camd (and every other host command) exited 127.
host_command now runs from home (env -C), and the launcher cds there.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

hands/rec/ft-handrec

@@ -11,6 +11,9 @@ case $wl in /*) ;; *) wl="${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/$wl" ;; esac
 session_bus=${DBUS_SESSION_BUS_ADDRESS:-}
 export XDG_RUNTIME_DIR=/run/user/$(id -u)
 export DBUS_SESSION_BUS_ADDRESS=unix:path=$XDG_RUNTIME_DIR/bus
+# From the home folder: the app's host commands (distrobox-host-exec) run in its folder on the
+# host, and a folder only the container has, such as /run/host/tmp, makes them all fail.
+cd "$HOME" || exit 1
 "$here/../../scripts/container-up.sh"
 exec "$HOME/.local/bin/distrobox" enter dev -- env WAYLAND_DISPLAY="$wl" DISPLAY="${DISPLAY:-}" \
   XAUTHORITY="${XAUTHORITY:-}" DBUS_SESSION_BUS_ADDRESS="$session_bus" \

hands/rec/session.py

@@ -109,11 +109,14 @@ def in_container():
 
 def host_command(*cmd):
     """argv to run a command on the SteamOS host from the dev container (as in
-    display-settings: distrobox-host-exec needs the user's real session bus)."""
+    display-settings: distrobox-host-exec needs the user's real session bus). It runs from the
+    home folder: host-spawn starts the command in the caller's folder, and a container-only
+    one such as /run/host/tmp doesn't exist on the host (every command then exits 127)."""
     exe = shutil.which("distrobox-host-exec")
     if not in_container() or not exe:
         return list(cmd)
-    return ["env", "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/%d/bus" % os.getuid(), exe] + list(cmd)
+    return ["env", "-C", os.path.expanduser("~"), "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/%d/bus" % os.getuid(),
+            exe] + list(cmd)
 
 
 def host_path(path):