merge(feat/person-birth-death-years): resolve conflicts with main, bump migration to V6

Resolves merge conflicts with main (feat/person-notes merged first).
Combines both features: birth/death years and notes field on person detail.
Renames migration V5__add_birth_death_years to V6 to avoid Flyway conflict.

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

frontend/e2e/persons.spec.ts

@@ -94,6 +94,40 @@ test.describe('New person', () => {
 	});
 });
 
+test.describe('Person detail — sort toggle', () => {
+	test('sort toggle changes the button label when person has documents', async ({ page }) => {
+		await page.goto('/persons');
+		const firstPerson = page.locator('a[href^="/persons/"]').first();
+		await firstPerson.click();
+		await page.waitForSelector('[data-hydrated]');
+
+		const sortBtn = page.getByRole('button', { name: /Neueste zuerst|Älteste zuerst/i });
+		if (await sortBtn.isVisible()) {
+			await expect(sortBtn).toContainText('Neueste zuerst');
+			await sortBtn.click();
+			await expect(sortBtn).toContainText('Älteste zuerst');
+			await sortBtn.click();
+			await expect(sortBtn).toContainText('Neueste zuerst');
+			await page.screenshot({ path: 'test-results/e2e/person-sort-toggle.png' });
+		}
+	});
+});
+
+test.describe('Person detail — conversations link', () => {
+	test('has a conversations link that pre-fills the person', async ({ page }) => {
+		await page.goto('/persons');
+		// Exclude /persons/new to avoid matching the "New person" button
+		const firstLink = page.locator('a[href^="/persons/"]:not([href="/persons/new"])').first();
+		const href = await firstLink.getAttribute('href');
+		const personId = href!.split('/persons/')[1];
+		await firstLink.click();
+		// Use the specific person-detail link text, not the nav "Konversationen" link
+		const convLink = page.getByRole('link', { name: /Konversationen anzeigen/i });
+		await expect(convLink).toBeVisible();
+		await expect(convLink).toHaveAttribute('href', `/conversations?senderId=${personId}`);
+	});
+});
+
 test.describe('Conversations', () => {
 	test('shows the empty state when no persons are selected', async ({ page }) => {
 		await page.goto('/conversations');