fix: git-sync для detached HEAD, shop-root требует .git

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

scripts/shop-root.sh

@@ -1,31 +1,31 @@
 #!/bin/bash
-# Каталог репозитория (где package.json). Переопределение: SHOP_ROOT=/path
+# Каталог репозитория (package.json + по возможности .git)
+# Переопределение: SHOP_ROOT=/opt/shop/shop10
 _resolve_shop_root() {
-  if [ -n "${SHOP_ROOT:-}" ] && [ -f "${SHOP_ROOT}/package.json" ]; then
-    return 0
-  fi
-  local here
-  here="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
-  if [ -f "${here}/package.json" ]; then
-    SHOP_ROOT="$here"
-    return 0
-  fi
-  if [ -f /opt/shop/shop10/package.json ]; then
-    SHOP_ROOT=/opt/shop/shop10
-    return 0
-  fi
-  if [ -f /opt/shop/package.json ]; then
-    SHOP_ROOT=/opt/shop
-    return 0
-  fi
+  local d
+  for d in \
+    "${SHOP_ROOT:-}" \
+    "$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)" \
+    "/opt/shop/shop10" \
+    "/opt/shop"; do
+    [ -z "$d" ] && continue
+    [ -f "${d}/package.json" ] && [ -d "${d}/.git" ] && SHOP_ROOT="$d" && return 0
+  done
+  for d in \
+    "${SHOP_ROOT:-}" \
+    "$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)" \
+    "/opt/shop/shop10" \
+    "/opt/shop"; do
+    [ -z "$d" ] && continue
+    [ -f "${d}/package.json" ] && SHOP_ROOT="$d" && return 0
+  done
   return 1
 }
 
 if ! _resolve_shop_root; then
   echo "Ошибка: не найден каталог Shop (нет package.json)."
-  echo "Перейдите в каталог клона и запустите:"
-  echo "  bash scripts/server-update.sh"
-  echo "Или задайте: SHOP_ROOT=/opt/shop/shop10 bash scripts/server-update.sh"
+  echo "  git clone https://git.evilfox.cc/test/shop10.git /opt/shop/shop10"
+  echo "  SHOP_ROOT=/opt/shop/shop10 bash scripts/server-update.sh"
   exit 1
 fi