test: add unit and e2e tests for public note sharing

Unit tests:
- shares-service: create, idempotent create, revoke, get, batch fetch
- ip-rate-limit: under/over limit, IP independence, window reset

E2E tests:
- Create public share link via UI
- Public page renders without auth
- Revoke share returns 404
- Trashed note share returns 404
- Globe icon on shared card
- Copy link to clipboard

Also fix sharing-indicator test-id in existing sharing.spec.ts
and add shared_notes table to test-helpers and db/index.ts init.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/e2e/public-sharing.spec.ts

@@ -0,0 +1,150 @@
+import { test, expect, noteCard } from './helpers/fixtures.js';
+import type { Page } from '@playwright/test';
+
+/**
+ * Create a note via API and return it.
+ */
+async function createNoteViaApi(page: Page, title: string, content = 'Public share content') {
+	const res = await page.request.post('/api/notes', {
+		data: { title, content }
+	});
+	return res.json();
+}
+
+/**
+ * Create a public share link for a note via API and return the token.
+ */
+async function createShareViaApi(page: Page, noteId: string): Promise<string> {
+	const res = await page.request.post(`/api/notes/${noteId}/share`);
+	const data = await res.json();
+	return data.token;
+}
+
+test.describe('Public Note Sharing', () => {
+	test('Scenario: User creates a public share link', async ({
+		authenticatedPage: page
+	}) => {
+		// Given a note titled "Public Test" exists
+		const note = await createNoteViaApi(page, 'Public Test', 'Hello world');
+		await page.reload();
+		await page.waitForLoadState('networkidle');
+
+		// When the owner opens the share dialog and enables the public link
+		await noteCard(page, 'Public Test').click();
+		await page.getByTestId('share-toggle').click();
+		await expect(page.getByTestId('share-dialog')).toBeVisible();
+		await page.getByTestId('public-share-toggle').click();
+
+		// Then a share URL is displayed
+		await expect(page.getByTestId('share-url-container')).toBeVisible({ timeout: 5000 });
+		const urlText = await page.getByTestId('share-url-text').textContent();
+		expect(urlText).toContain('/s/');
+	});
+
+	test('Scenario: Public page renders note content without auth', async ({
+		authenticatedPage: page,
+		browser
+	}) => {
+		// Given a publicly shared note exists
+		const note = await createNoteViaApi(page, 'Shared Publicly', 'This is **public** content');
+		const token = await createShareViaApi(page, note.id);
+
+		// When an unauthenticated user visits the share URL
+		const context = await browser.newContext();
+		const publicPage = await context.newPage();
+		await publicPage.goto(`/s/${token}`);
+
+		// Then the note content is rendered
+		await expect(publicPage.getByTestId('shared-note')).toBeVisible();
+		await expect(publicPage.getByTestId('shared-note-title')).toHaveText('Shared Publicly');
+		await expect(publicPage.getByTestId('shared-note-content')).toContainText('public');
+
+		await context.close();
+	});
+
+	test('Scenario: User revokes share and link returns 404', async ({
+		authenticatedPage: page,
+		browser
+	}) => {
+		// Given a publicly shared note exists
+		const note = await createNoteViaApi(page, 'Revoke Test', 'Will be revoked');
+		const token = await createShareViaApi(page, note.id);
+
+		// And the public page is accessible
+		const context = await browser.newContext();
+		const publicPage = await context.newPage();
+		await publicPage.goto(`/s/${token}`);
+		await expect(publicPage.getByTestId('shared-note')).toBeVisible();
+
+		// When the owner revokes the share
+		const revokeRes = await page.request.delete(`/api/notes/${note.id}/share`);
+		expect(revokeRes.status()).toBe(204);
+
+		// Then the public page returns 404
+		const res = await publicPage.request.get(`/api/shared/${token}`);
+		expect(res.status()).toBe(404);
+
+		await context.close();
+	});
+
+	test('Scenario: Trashed note share link returns 404', async ({
+		authenticatedPage: page
+	}) => {
+		// Given a publicly shared note that is then trashed
+		const note = await createNoteViaApi(page, 'Trash Share Test', 'Will be trashed');
+		const token = await createShareViaApi(page, note.id);
+
+		// When the note is trashed
+		await page.request.patch(`/api/notes/${note.id}`, {
+			data: { trashed: true }
+		});
+
+		// Then the shared API returns 404
+		const res = await page.request.get(`/api/shared/${token}`);
+		expect(res.status()).toBe(404);
+	});
+
+	test('Scenario: Globe icon appears on shared note card', async ({
+		authenticatedPage: page
+	}) => {
+		// Given a note with a public share link
+		const note = await createNoteViaApi(page, 'Globe Icon Test');
+		await createShareViaApi(page, note.id);
+
+		// When the user views the notes list
+		await page.reload();
+		await page.waitForLoadState('networkidle');
+
+		// Then the note card shows a sharing indicator
+		const card = noteCard(page, 'Globe Icon Test');
+		await expect(card).toBeVisible();
+		await expect(card.getByTestId('sharing-indicator')).toBeVisible();
+	});
+
+	test('Scenario: Copy link button copies to clipboard', async ({
+		authenticatedPage: page
+	}) => {
+		// Given a note with a public share link
+		const note = await createNoteViaApi(page, 'Copy Link Test');
+		await createShareViaApi(page, note.id);
+		await page.reload();
+		await page.waitForLoadState('networkidle');
+
+		// When the owner opens the share dialog
+		await noteCard(page, 'Copy Link Test').click();
+		await page.getByTestId('share-toggle').click();
+		await expect(page.getByTestId('share-dialog')).toBeVisible();
+
+		// Then the share URL is already visible (token was created via API)
+		await expect(page.getByTestId('share-url-container')).toBeVisible({ timeout: 5000 });
+
+		// And clicking copy shows the check icon
+		// Grant clipboard permissions for the test
+		await page.context().grantPermissions(['clipboard-read', 'clipboard-write']);
+		await page.getByTestId('copy-share-url-btn').click();
+
+		// The clipboard should contain the share URL
+		const clipboardText = await page.evaluate(() => navigator.clipboard.readText());
+		expect(clipboardText).toContain('/s/');
+	});
+});

tests/e2e/sharing.spec.ts

@@ -54,8 +54,8 @@ test.describe('Note Sharing', () => {
 		await page.getByTestId('share-dialog-overlay').click({ position: { x: 10, y: 10 } });
 		await page.getByTestId('close-editor-btn').click();
 
-		// Then the owner sees a collaborator indicator
-		await expect(noteCard(page, 'Share Test').getByTestId('collaborator-indicator')).toBeVisible();
+		// Then the owner sees a sharing indicator
+		await expect(noteCard(page, 'Share Test').getByTestId('sharing-indicator')).toBeVisible();
 
 		// And the collaborator sees the shared note in their list
 		await collabPage.reload();