Add remaining samples, tooling, and local project assets

samples/src/lib/markdownUtils.js

@@ -0,0 +1,22 @@
+// /src/utils/markdownUtils.js
+const imageCache = new Map();
+
+export function resolveImagePath(src) {
+  if (!src) return src;
+  if (src.startsWith("@img/")) {
+    return src.replace("@img/", "/civil-engineering-lab/images/");
+  }
+  if (src.startsWith("../assets/images/")) {
+    return src.replace("../assets/images/", "/civil-engineering-lab/images/");
+  }
+  return src;
+}
+
+/**
+ * href가 외부 링크인지 확인
+ * - http://, https://, // 로 시작하면 외부 링크로 판단
+ */
+export function isExternalLink(href) {
+  if (!href) return false;
+  return /^https?:\/\//.test(href) || href.startsWith("//");
+}