the face stays quiet when the rig is not staged; add stage-face.sh

tools/stage-face.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# Put the Live2D rig where the face host expects it.
+#
+# The rig is licensed assets and stays out of every repo (TASK-59) — so it is
+# copied onto a device, never cloned with the source. Without this the host has
+# an index.html referring to files that are not there, which is the "missing
+# assets/face" every fresh checkout sees.
+set -euo pipefail
+SRC="${1:-$HOME/Downloads/blog/Live2dHistoire/live2d}"
+DEST="${FACE_DIR:-$HOME/.souveraine/face}"
+HERE="$(cd "$(dirname "$0")/.." && pwd)"
+
+[ -d "$SRC" ] || { echo "no rig at $SRC — pass its path as \$1" >&2; exit 1; }
+mkdir -p "$DEST"
+cp -r "$SRC" "$DEST/"
+cp "$HERE/assets/face/index.html" "$DEST/index.html"
+echo "staged $(du -sh "$DEST" | cut -f1) at $DEST"