test(edit): add tests for handleDelete on the edit page

Covers: button present, confirm dialog opens, form submitted on confirm,
form not submitted on cancel.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/documents/[id]/edit/page.svelte.spec.ts

@@ -0,0 +1,82 @@
+import { vi, describe, it, expect, afterEach } from 'vitest';
+import { cleanup, render } from 'vitest-browser-svelte';
+import { page } from 'vitest/browser';
+import { createConfirmService, CONFIRM_KEY } from '$lib/services/confirm.svelte.js';
+import EditPage from './+page.svelte';
+
+afterEach(cleanup);
+
+function makeDocument(overrides: Record<string, unknown> = {}) {
+	return {
+		id: 'doc-1',
+		title: 'Test Document',
+		originalFilename: 'test.pdf',
+		status: 'UPLOADED' as const,
+		createdAt: '2024-01-01T00:00:00Z',
+		updatedAt: '2024-01-01T00:00:00Z',
+		metadataComplete: false,
+		scriptType: 'UNKNOWN' as const,
+		// No filePath — avoids triggering the file loader fetch in tests
+		...overrides
+	};
+}
+
+describe('Edit page — delete button', () => {
+	it('renders the delete button', async () => {
+		const service = createConfirmService();
+		render(EditPage, {
+			props: { data: { document: makeDocument() }, form: null },
+			context: new Map([[CONFIRM_KEY, service]])
+		});
+		await expect.element(page.getByRole('button', { name: /löschen/i })).toBeInTheDocument();
+	});
+
+	it('opens a confirm dialog when the delete button is clicked', async () => {
+		const service = createConfirmService();
+		render(EditPage, {
+			props: { data: { document: makeDocument() }, form: null },
+			context: new Map([[CONFIRM_KEY, service]])
+		});
+
+		await page.getByRole('button', { name: /löschen/i }).click();
+		// The confirm service should have received an options object (dialog is open)
+		expect(service.options).not.toBeNull();
+		expect(service.options?.destructive).toBe(true);
+		service.settle(false);
+	});
+
+	it('submits the delete form when the user confirms', async () => {
+		const service = createConfirmService();
+		render(EditPage, {
+			props: { data: { document: makeDocument() }, form: null },
+			context: new Map([[CONFIRM_KEY, service]])
+		});
+
+		const deleteForm = document.getElementById('delete-form') as HTMLFormElement;
+		const submitSpy = vi.spyOn(deleteForm, 'requestSubmit').mockImplementation(() => {});
+
+		await page.getByRole('button', { name: /löschen/i }).click();
+		// confirm() has been called synchronously — settle and flush the microtask queue
+		service.settle(true);
+		await Promise.resolve();
+
+		expect(submitSpy).toHaveBeenCalledOnce();
+	});
+
+	it('does NOT submit the delete form when the user cancels', async () => {
+		const service = createConfirmService();
+		render(EditPage, {
+			props: { data: { document: makeDocument() }, form: null },
+			context: new Map([[CONFIRM_KEY, service]])
+		});
+
+		const deleteForm = document.getElementById('delete-form') as HTMLFormElement;
+		const submitSpy = vi.spyOn(deleteForm, 'requestSubmit').mockImplementation(() => {});
+
+		await page.getByRole('button', { name: /löschen/i }).click();
+		service.settle(false);
+		await Promise.resolve();
+
+		expect(submitSpy).not.toHaveBeenCalled();
+	});
+});