feat: render interactive parent directory tile for rapid upward navigation

Automatically prepend a dedicated parent directory (`..`) navigation tile at the top of directory listings when navigating deep within a folder structure.

* **Template Integration (`src/pages/fileBrowser/listItem.hbs`):**
  * Added template parsing support for the `data-one-dir-up` attribute to identify parent navigation controls.
* **Dynamic Item Prepending (`src/pages/fileBrowser/fileBrowser.js`):**
  * Added conditional evaluation during directory rendering: when `navStack.length >= 2`, a non-selectable parent folder item (`..`) is automatically prepended to the top of the rendered list array.
  * Flagged the parent directory tile with `data-not-selectable` so it is ignored during batch selection operations.
* **Navigation Action Dispatch:**
  * Bound tap and click actions on items bearing `data-one-dir-up` to execute an upward navigation jump directly to `navStack.get(-2)`, streamlining folder hierarchy traversal.

(AI generated commit message)

Author: AuDevTist1C

src/pages/fileBrowser/fileBrowser.js

@@ -903,6 +903,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 
 			let url = $el.dataset.url;
 			let name = $el.dataset.name;
+			const isOneDirUp = $el.dataset.oneDirUp != null;
 			const isOpenDoc = $el.dataset.openDoc != null;
 			const uuid = $el.dataset.uuid;
 			const type = $el.dataset.type;
@@ -920,7 +921,14 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 				return;
 			}
 
-			if (!url && action === "open" && isDir && !isOpenDoc && !isContextMenu) {
+			if (
+				!url &&
+				action === "open" &&
+				isDir &&
+				!isOpenDoc &&
+				!isOneDirUp &&
+				!isContextMenu
+			) {
 				loader.hide();
 				util.addPath(name, uuid).then((res) => {
 					const storage = allStorages.find((storage) => storage.uuid === uuid);
@@ -936,6 +944,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 
 			if (isContextMenu) action = "contextmenu";
 			else if (isOpenDoc) action = "openDoc";
+			else if (isOneDirUp) action = "oneDirUp";
 
 			switch (action) {
 				case "navigation":
@@ -950,6 +959,11 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 					break;
 				case "openDoc":
 					openDoc();
+					break;
+				case "oneDirUp": {
+					const dir = navStack.get(-2);
+					if (dir) navigate(dir.url, dir.name);
+				}
 			}
 
 			async function folder() {
@@ -995,7 +1009,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 			}
 
 			async function contextMenuHandler() {
-				if (isOpenDoc) return;
+				if (isOneDirUp || isOpenDoc) return;
 				if (appSettings.value.vibrateOnTap) {
 					navigator.vibrate(config.VIBRATION_TIME);
 				}
@@ -1539,6 +1553,14 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 			const $oldList = $content.get("#list");
 			const $list = createListEl();
 
+			const oneDirUp =
+				navStack.length >= 2 &&
+				createListItemEl({
+					name: "..",
+					oneDirUp: true,
+					notSelectable: true,
+				});
+
 			if (!$oldList) $content.append($list);
 			else {
 				const dir = currentDir;
@@ -1555,6 +1577,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 			let { list } = dir;
 			const fg = new DocumentFragment();
 			if (!list) {
+				if (oneDirUp) fg.append(oneDirUp);
 				let plh = { placeholder: true };
 				for (let i = Math.ceil($list.clientHeight / 45); i-- > 0; ) {
 					const el = createListItemEl(plh);
@@ -1569,6 +1592,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 
 			if (_rndrAbortCtrl === rndrAbortCtrl) _rndrAbortCtrl = null;
 
+			if (oneDirUp) fg.append(oneDirUp);
 			for (let l = list?.length, i = 0; i < l; i++) {
 				fg.append(createListItemEl(list[i]));
 			}

src/pages/fileBrowser/listItem.hbs

@@ -6,6 +6,7 @@
   data-name="{{name}}"
   {{#home}}data-home="{{.}}"{{/home}}
   {{#notSelectable}}data-not-selectable{{/notSelectable}}
+  {{#oneDirUp}}data-one-dir-up{{/oneDirUp}}
   {{#openDoc}}data-open-doc{{/openDoc}}
   {{#ftpAccount}}data-ftp-account{{/ftpAccount}}
   {{#uuid}}data-uuid="{{uuid}}"{{/uuid}}