add: markdown deletion

src/utils/pathUtils.js

@@ -0,0 +1,45 @@
+export const findMarkdownByPath = (tree, pathString) => {
+    if (!tree || !pathString) return null;
+    
+    const pathSegments = pathString.split('/').filter(segment => segment.length > 0);
+
+    if (pathSegments.length === 0) {
+        const rootIndex = tree.children?.find(
+            child => child.type === 'markdown' && child.title === 'index'
+        );
+        return rootIndex || null;
+    }
+    let currentNode = tree;
+
+    for (let i = 0; i < pathSegments.length; i++) {
+        const segment = pathSegments[i];
+
+        const childPath = currentNode.children?.find(
+            child => child.type === 'path' && child.name === segment
+        );
+        
+        if (!childPath) {
+            if (i === pathSegments.length - 1) {
+                const markdownNode = currentNode.children?.find(
+                    child => child.type === 'markdown' && child.title === segment
+                );
+                return markdownNode || null;
+            }
+            return null;
+        }
+        
+        currentNode = childPath;
+    }
+    
+
+    const indexMarkdown = currentNode.children?.find(
+        child => child.type === 'markdown' && child.title === 'index'
+    );
+    
+    return indexMarkdown || null;
+};
+
+export const getMarkdownIdByPath = (tree, pathString) => {
+    const markdownNode = findMarkdownByPath(tree, pathString);
+    return markdownNode?.id || null;
+};