fix(editor): open existing notes in the user's default note mode

Existing notes initialised raw markdown mode from note.checklistMode
instead of the defaultNoteMode preference, so users with Markdown as
default always got the rich text editor when reopening a note.

Fixes #96

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017neWQAAxi6nZYmwRkDThsy

src/lib/components/NoteEditor.svelte

@@ -60,7 +60,7 @@
 	let showColorPicker = $state(false);
 	let showImageUpload = $state(false);
 	// svelte-ignore state_referenced_locally
-	let rawMarkdownMode = $state(note ? (note.checklistMode ?? false) : prefs.defaultNoteMode === 'markdown');
+	let rawMarkdownMode = $state(prefs.defaultNoteMode === 'markdown');
 	let textareaEl: HTMLTextAreaElement | undefined = $state();
 	let tiptapEditor: Editor | undefined = $state();
 	let editorTick = $state(0);

tests/e2e/settings.spec.ts

@@ -1,4 +1,4 @@
-import { test, expect } from './helpers/fixtures.js';
+import { test, expect, noteCard } from './helpers/fixtures.js';
 import type { Page } from '@playwright/test';
 
 const DEFAULT_PREFS = {
@@ -81,6 +81,30 @@ test.describe('Settings — Preferences', () => {
 		await expect(page.getByTestId('note-content-input')).toBeVisible();
 	});
 
+	test('Scenario: Default note mode applies when reopening an existing note', async ({
+		authenticatedPage: page
+	}) => {
+		await resetPreferences(page);
+
+		// Given a note titled "Existing Markdown Note" exists
+		const title = `Existing Markdown Note ${Date.now()}`;
+		await page.request.post('/api/notes', { data: { title, content: 'Some **bold** text' } });
+
+		// And the user's default note mode is Markdown
+		await gotoWithStablePrefs(page, '/settings/preferences');
+		const putResponse = page.waitForResponse((res) => res.url().includes('/api/preferences') && res.request().method() === 'PUT');
+		await page.getByTestId('pref-mode-markdown').click();
+		await putResponse;
+
+		// When the user opens the note
+		await gotoWithStablePrefs(page, '/');
+		await noteCard(page, title).click();
+
+		// Then the note editor opens in markdown mode showing the raw source
+		await expect(page.getByTestId('note-content-input')).toBeVisible();
+		await expect(page.getByTestId('note-content-input')).toHaveValue('Some **bold** text');
+	});
+
 	test('Scenario: Footer toggle hides and shows footer', async ({
 		authenticatedPage: page
 	}) => {