fix(release): bundle Memind wechat/ subtree into memind-lib

wechat-mp.mjs imports wechat/ack/*; omitting that directory caused Admin API
bootstrap to fail on 103 artifact deploys.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/release-prod.sh

@@ -120,6 +120,10 @@ find "${MEMIND_SRC}" -maxdepth 1 -name '*.mjs' -exec cp -f {} "${MEMIND_LIB}/" \
 if [[ -d "${MEMIND_SRC}/skills" ]]; then
   cp -a "${MEMIND_SRC}/skills" "${MEMIND_LIB}/"
 fi
+# wechat-mp.mjs 依赖 wechat/ack/*
+if [[ -d "${MEMIND_SRC}/wechat" ]]; then
+  cp -a "${MEMIND_SRC}/wechat" "${MEMIND_LIB}/"
+fi
 [[ -f "${MEMIND_LIB}/user-auth.mjs" ]] || {
   echo "memind-lib 缺少 user-auth.mjs" >&2
   exit 1