fix(sidebar): refresh folder tree after creating files

src/components/fileTree/index.js

@@ -167,6 +167,7 @@ export default class FileTree {
 
 		// Child file tree for nested folders
 		let childTree = null;
+		$content._fileTree = null;
 
 		const toggle = async () => {
 			const isExpanded = !$wrapper.classList.contains("hidden");
@@ -179,6 +180,7 @@ export default class FileTree {
 					childTree.destroy();
 					this.childTrees.delete(url);
 					childTree = null;
+					$content._fileTree = null;
 				}
 				this.options.onExpandedChange?.(url, false);
 			} else {
@@ -192,6 +194,7 @@ export default class FileTree {
 					_depth: this.depth + 1,
 				});
 				this.childTrees.set(url, childTree);
+				$content._fileTree = childTree;
 				try {
 					await childTree.load(url);
 				} finally {
@@ -216,20 +219,34 @@ export default class FileTree {
 			queueMicrotask(() => toggle());
 		}
 
-		// Add properties for external access (keep unclasped for collapsableList compatibility)
-		Object.defineProperties($wrapper, {
-			collapsed: { get: () => $wrapper.classList.contains("hidden") },
-			expanded: { get: () => !$wrapper.classList.contains("hidden") },
-			unclasped: { get: () => !$wrapper.classList.contains("hidden") }, // Legacy compatibility
-			$title: { get: () => $title },
-			$ul: { get: () => $content },
-			expand: {
-				value: () => !$wrapper.classList.contains("hidden") || toggle(),
-			},
-			collapse: {
-				value: () => $wrapper.classList.contains("hidden") || toggle(),
-			},
-		});
+		const defineCollapsibleAccessors = ($el, { includeTitle = true } = {}) => {
+			const properties = {
+				collapsed: { get: () => $wrapper.classList.contains("hidden") },
+				expanded: { get: () => !$wrapper.classList.contains("hidden") },
+				unclasped: { get: () => !$wrapper.classList.contains("hidden") }, // Legacy compatibility
+				$ul: { get: () => $content },
+				fileTree: { get: () => childTree },
+				refresh: {
+					value: () => childTree?.refresh(),
+				},
+				expand: {
+					value: () => !$wrapper.classList.contains("hidden") || toggle(),
+				},
+				collapse: {
+					value: () => $wrapper.classList.contains("hidden") || toggle(),
+				},
+			};
+
+			if (includeTitle) {
+				properties.$title = { get: () => $title };
+			}
+
+			Object.defineProperties($el, properties);
+		};
+
+		// Keep nested folders compatible with the legacy collapsableList API.
+		defineCollapsibleAccessors($wrapper);
+		defineCollapsibleAccessors($title, { includeTitle: false });
 
 		return $wrapper;
 	}
@@ -281,11 +298,7 @@ export default class FileTree {
 	 * Clear all rendered content
 	 */
 	clear() {
-		// Destroy all child trees
-		for (const childTree of this.childTrees.values()) {
-			childTree.destroy();
-		}
-		this.childTrees.clear();
+		this.destroyChildTrees();
 
 		if (this.virtualList) {
 			this.virtualList.destroy();
@@ -322,6 +335,16 @@ export default class FileTree {
 		}
 	}
 
+	/**
+	 * Destroy all expanded child trees and clear their references.
+	 */
+	destroyChildTrees() {
+		for (const childTree of this.childTrees.values()) {
+			childTree.destroy();
+		}
+		this.childTrees.clear();
+	}
+
 	/**
 	 * Append a new entry to the tree
 	 * @param {string} name
@@ -356,6 +379,7 @@ export default class FileTree {
 			this.virtualList.setItems(this.entries);
 		} else {
 			// Fragment mode: re-render
+			this.destroyChildTrees();
 			this.container.innerHTML = "";
 			this.renderWithFragment();
 		}

src/lib/openFolder.js

@@ -702,20 +702,14 @@ function execOperation(type, action, url, $target, name) {
 			if (!newUrl.created) return;
 
 			if (isNestedPath) {
-				openFolder.find(url)?.reload();
+				await refreshOpenFolder(url);
 				await FileList.refresh();
 				toast(strings.success);
 				return;
 			}
 
 			newName = Url.basename(newUrl.uri);
-			if ($target.unclasped) {
-				if (newUrl.type === "file") {
-					appendTile($target, createFileTile(newName, newUrl.uri));
-				} else if (newUrl.type === "folder") {
-					appendList($target, createFolderTile(newName, newUrl.uri));
-				}
-			}
+			appendEntryToOpenFolder(url, newUrl.uri, newUrl.type);
 
 			FileList.append(url, newUrl.uri);
 			toast(strings.success);
@@ -995,6 +989,72 @@ function appendList($target, $list) {
 	else $target.append($list);
 }
 
+/**
+ * Get the active file tree for a folder element, if it has been loaded.
+ * @param {HTMLElement} $el
+ * @returns {FileTree|null}
+ */
+function getLoadedFileTree($el) {
+	return (
+		$el?.$ul?._fileTree || $el?.fileTree || $el?.nextElementSibling?._fileTree
+	);
+}
+
+/**
+ * Update matching expanded folder views with a new entry.
+ * @param {string} parentUrl
+ * @param {string} entryUrl
+ * @param {"file"|"folder"} type
+ */
+function appendEntryToOpenFolder(parentUrl, entryUrl, type) {
+	const filesApp = sidebarApps.get("files");
+	const $els = filesApp.getAll(`[data-url="${parentUrl}"]`);
+	const isDirectory = type === "folder";
+	const name = Url.basename(entryUrl);
+
+	Array.from($els).forEach(($el) => {
+		if (!(helpers.isDir($el.dataset.type) || $el.dataset.type === "root")) {
+			return;
+		}
+
+		if (!$el.unclasped) return;
+
+		const fileTree = getLoadedFileTree($el);
+		if (fileTree) {
+			fileTree.appendEntry(name, entryUrl, isDirectory);
+			return;
+		}
+
+		if (isDirectory) {
+			appendList($el, createFolderTile(name, entryUrl));
+		} else {
+			appendTile($el, createFileTile(name, entryUrl));
+		}
+	});
+}
+
+/**
+ * Refresh matching expanded folder views.
+ * @param {string} folderUrl
+ */
+async function refreshOpenFolder(folderUrl) {
+	const filesApp = sidebarApps.get("files");
+	const $els = filesApp.getAll(`[data-url="${folderUrl}"]`);
+
+	await Promise.all(
+		Array.from($els).map(async ($el) => {
+			if (!(helpers.isDir($el.dataset.type) || $el.dataset.type === "root")) {
+				return;
+			}
+
+			const fileTree = getLoadedFileTree($el);
+			if (fileTree) {
+				await fileTree.refresh();
+			}
+		}),
+	);
+}
+
 /**
  * Create a folder tile
  * @param {string} name
@@ -1039,18 +1099,7 @@ function createFileTile(name, url) {
 openFolder.add = async (url, type) => {
 	const { url: parent } = await fsOperation(Url.dirname(url)).stat();
 	FileList.append(parent, url);
-
-	const filesApp = sidebarApps.get("files");
-	const $els = filesApp.getAll(`[data-url="${parent}"]`);
-	Array.from($els).forEach(($el) => {
-		if ($el.dataset.type !== "dir") return;
-
-		if (type === "file") {
-			appendTile($el, createFileTile(Url.basename(url), url));
-		} else {
-			appendList($el, createFolderTile(Url.basename(url), url));
-		}
-	});
+	appendEntryToOpenFolder(parent, url, type);
 };
 
 openFolder.renameItem = (oldFile, newFile, newFilename) => {