fix: tab rename never worked — window.prompt is a no-op in the webview

src/lib/MarkdownViewer.svelte

@@ -316,6 +316,39 @@ import { t } from './utils/i18n.js';
 		});
 	}
 
+	// window.prompt() is a silent no-op inside the webview (wry does not
+	// implement the native JS dialogs), so text input goes through our own
+	// modal. Resolves with the entered string, or null on cancel.
+	let promptModal = $state<{
+		show: boolean;
+		title: string;
+		message: string;
+		value: string;
+		resolve: ((v: string | null) => void) | null;
+	}>({ show: false, title: '', message: '', value: '', resolve: null });
+
+	function promptCustom(message: string, options: { title: string; initial?: string }): Promise<string | null> {
+		return new Promise((resolve) => {
+			promptModal = {
+				show: true,
+				title: options.title,
+				message,
+				value: options.initial ?? '',
+				resolve,
+			};
+		});
+	}
+
+	function handlePromptConfirm() {
+		if (promptModal.resolve) promptModal.resolve(promptModal.value);
+		promptModal.show = false;
+	}
+
+	function handlePromptCancel() {
+		if (promptModal.resolve) promptModal.resolve(null);
+		promptModal.show = false;
+	}
+
 	function handleModalSave() {
 		if (modalState.resolve) modalState.resolve('save');
 		modalState.show = false;
@@ -2724,7 +2757,10 @@ import { t } from './utils/i18n.js';
 					const tab = tabManager.tabs.find((t) => t.id === tabId);
 					if (!tab || !tab.path) return;
 
-					const newName = window.prompt(t('menu.renameFile', settings.language), tab.title);
+					const newName = await promptCustom(t('menu.renameFile', settings.language), {
+						title: t('menu.rename', settings.language),
+						initial: tab.title,
+					});
 					if (newName && newName !== tab.title) {
 						const oldPath = tab.path;
 						const newPath = oldPath.replace(/[/\\][^/\\]+$/, (m) => m.charAt(0) + newName);
@@ -3387,6 +3423,16 @@ import { t } from './utils/i18n.js';
 		onsave={handleModalSave}
 		oncancel={handleModalCancel} />
 
+	<Modal
+		show={promptModal.show}
+		title={promptModal.title}
+		message={promptModal.message}
+		kind="info"
+		showInput={true}
+		bind:inputValue={promptModal.value}
+		onconfirm={handlePromptConfirm}
+		oncancel={handlePromptCancel} />
+
 	<UpdateDialog />
 
 	<div class="toast-container">

src/lib/components/Modal.svelte

@@ -9,6 +9,8 @@
 		message,
 		kind = 'info',
 		showSave = false,
+		showInput = false,
+		inputValue = $bindable(''),
 		onconfirm,
 		onsave,
 		oncancel,
@@ -18,18 +20,26 @@
 		message: string;
 		kind?: 'info' | 'warning' | 'error';
 		showSave?: boolean;
+		showInput?: boolean;
+		inputValue?: string;
 		onconfirm: () => void;
 		onsave?: () => void;
 		oncancel: () => void;
 	}>();
 
 	let modalContent = $state<HTMLDivElement>();
+	let inputElement = $state<HTMLInputElement>();
 	let previousActiveElement: HTMLElement | null = null;
 
 	$effect(() => {
 		if (show) {
 			previousActiveElement = document.activeElement as HTMLElement;
 			setTimeout(() => {
+				if (showInput && inputElement) {
+					inputElement.focus();
+					inputElement.select();
+					return;
+				}
 				const focusable = modalContent?.querySelector('button.primary') as HTMLElement;
 				if (focusable) {
 					focusable.focus();
@@ -43,6 +53,9 @@
 	});
 
 	function handleKeydown(e: KeyboardEvent) {
+		// While the user is typing in the input, plain letters are text —
+		// the y/n confirm/cancel shortcuts must not fire.
+		const typingInInput = showInput && e.target === inputElement;
 		if (e.key === 'Escape') {
 			e.preventDefault();
 			oncancel();
@@ -56,12 +69,12 @@
 			}
 		}
 		// Y for Yes/Confirm
-		if (e.key.toLowerCase() === 'y' && !e.ctrlKey && !e.altKey && !e.metaKey) {
+		if (!typingInInput && e.key.toLowerCase() === 'y' && !e.ctrlKey && !e.altKey && !e.metaKey) {
 			e.preventDefault();
 			onconfirm();
 		}
 		// N for No/Cancel
-		if (e.key.toLowerCase() === 'n' && !e.ctrlKey && !e.altKey && !e.metaKey) {
+		if (!typingInInput && e.key.toLowerCase() === 'n' && !e.ctrlKey && !e.altKey && !e.metaKey) {
 			e.preventDefault();
 			oncancel();
 		}
@@ -112,6 +125,9 @@
 			</div>
 			<div class="modal-body">
 				<p>{message}</p>
+				{#if showInput}
+					<input class="modal-input" type="text" bind:this={inputElement} bind:value={inputValue} spellcheck="false" />
+				{/if}
 			</div>
 			<div class="modal-footer">
 					<button class="modal-btn secondary" onclick={oncancel}>{t('settings.cancel', settings.language)}</button>
@@ -174,6 +190,24 @@
 		color: var(--color-fg-muted);
 	}
 
+	.modal-input {
+		margin-top: 12px;
+		width: 100%;
+		box-sizing: border-box;
+		padding: 6px 10px;
+		font-size: 14px;
+		font-family: inherit;
+		color: var(--color-fg-default);
+		background: var(--color-canvas-default);
+		border: 1px solid var(--color-border-default);
+		border-radius: 6px;
+		outline: none;
+	}
+
+	.modal-input:focus {
+		border-color: var(--color-accent-fg);
+	}
+
 	.modal-footer {
 		padding: 16px 24px;
 		background: var(--color-canvas-subtle);

src/lib/components/Tab.svelte

@@ -68,7 +68,13 @@
 			items: [
 				{ label: t('menu.newFile', currentLang), shortcut: 'Ctrl+T', onClick: () => emit('menu-tab-new') },
 				{ label: t('menu.undoCloseTab', currentLang), shortcut: 'Ctrl+Shift+T', onClick: () => emit('menu-tab-undo') },
-				{ label: t('menu.rename', currentLang), onClick: () => emit('menu-tab-rename', tab.id) },
+				{
+					label: t('menu.rename', currentLang),
+					// Rename renames the file on disk; untitled/HOME tabs have
+					// no file, and the handler previously no-oped silently.
+					disabled: !hasRealFilePath(tab.path),
+					onClick: () => emit('menu-tab-rename', tab.id),
+				},
 				{ separator: true },
 				...fileActionItems,
 				{ separator: true },