fix: harden Unix scripts and Makefile

scripts/build.sh

@@ -11,10 +11,20 @@ echo "[1/2] 同步物品贴图"
 "$DIR/sync-items.sh"
 
 if ! command -v hugo >/dev/null 2>&1; then
-  echo "[错误] 未找到 hugo, 请安装 Hugo 或将其加入 PATH。" >&2
-  exit 1
+  HUGO_BIN=""
+  if [ -n "${HUGO:-}" ] && [ -x "$HUGO" ]; then
+    HUGO_BIN="$HUGO"
+  elif [ -n "${LOCALAPPDATA:-}" ]; then
+    HUGO_BIN="$(find "$LOCALAPPDATA/Microsoft/WinGet/Packages" -maxdepth 3 -name hugo.exe 2>/dev/null | head -n 1)"
+  fi
+  if [ -z "$HUGO_BIN" ]; then
+    echo "[错误] 未找到 hugo, 请安装 Hugo、将其加入 PATH, 或设置环境变量 HUGO。" >&2
+    exit 1
+  fi
+else
+  HUGO_BIN="$(command -v hugo)"
 fi
 
 echo
 echo "[2/2] hugo 构建"
-exec hugo "$@"
+exec "$HUGO_BIN" "$@"