diff --git a/frontend/src/routes/conversations/page.svelte.spec.ts b/frontend/src/routes/conversations/page.svelte.spec.ts
index c7cb41fc..2e935a3b 100644
--- a/frontend/src/routes/conversations/page.svelte.spec.ts
+++ b/frontend/src/routes/conversations/page.svelte.spec.ts
@@ -10,6 +10,7 @@ afterEach(cleanup);
 // ─── Test data ────────────────────────────────────────────────────────────────
 
 const baseData = {
+	user: undefined,
 	canWrite: true,
 	documents: [],
 	initialValues: { senderName: '', receiverName: '' },
@@ -31,8 +32,8 @@ const makeDoc = (overrides: Record<string, unknown> = {}) => ({
 	sender: { id: 'p1', firstName: 'Hans', lastName: 'Müller' },
 	receivers: [{ id: 'p2', firstName: 'Anna', lastName: 'Schmidt' }],
 	tags: [],
-	transcription: null,
-	filePath: null,
+	transcription: undefined,
+	filePath: undefined,
 	createdAt: '1923-04-12T00:00:00Z',
 	updatedAt: '1923-04-12T00:00:00Z',
 	...overrides
diff --git a/frontend/src/routes/documents/new/page.svelte.spec.ts b/frontend/src/routes/documents/new/page.svelte.spec.ts
index 7968fe30..0a269279 100644
--- a/frontend/src/routes/documents/new/page.svelte.spec.ts
+++ b/frontend/src/routes/documents/new/page.svelte.spec.ts
@@ -8,6 +8,8 @@ afterEach(cleanup);
 // ─── Test data ────────────────────────────────────────────────────────────────
 
 const baseData = {
+	user: undefined,
+	canWrite: true,
 	persons: [],
 	initialSenderId: '',
 	initialSenderName: '',
@@ -18,14 +20,15 @@ const baseData = {
 
 describe('New document page – sender prefill', () => {
 	it('shows an empty sender input when no senderId is in the URL', async () => {
-		render(Page, { data: baseData });
+		render(Page, { data: baseData, form: null });
 		const input = document.querySelector<HTMLInputElement>('#senderId-search');
 		expect(input?.value).toBe('');
 	});
 
 	it('shows the sender name in the typeahead input when initialSenderName is set', async () => {
 		render(Page, {
-			data: { ...baseData, initialSenderId: 'p1', initialSenderName: 'Hans Müller' }
+			data: { ...baseData, initialSenderId: 'p1', initialSenderName: 'Hans Müller' },
+			form: null
 		});
 		const input = document.querySelector<HTMLInputElement>('#senderId-search');
 		expect(input?.value).toBe('Hans Müller');
@@ -33,7 +36,8 @@ describe('New document page – sender prefill', () => {
 
 	it('sets the hidden senderId input to the prefilled ID', async () => {
 		render(Page, {
-			data: { ...baseData, initialSenderId: 'p1', initialSenderName: 'Hans Müller' }
+			data: { ...baseData, initialSenderId: 'p1', initialSenderName: 'Hans Müller' },
+			form: null
 		});
 		const hidden = document.querySelector<HTMLInputElement>(
 			'input[type="hidden"][name="senderId"]'
@@ -46,7 +50,7 @@ describe('New document page – sender prefill', () => {
 
 describe('New document page – receiver prefill', () => {
 	it('shows no receiver chips when initialReceivers is empty', async () => {
-		render(Page, { data: baseData });
+		render(Page, { data: baseData, form: null });
 		await expect.element(page.getByText('Anna Schmidt')).not.toBeInTheDocument();
 	});
 
@@ -55,7 +59,7 @@ describe('New document page – receiver prefill', () => {
 			...baseData,
 			initialReceivers: [{ id: 'p2', firstName: 'Anna', lastName: 'Schmidt' }]
 		};
-		render(Page, { data });
+		render(Page, { data, form: null });
 		await expect.element(page.getByText('Anna Schmidt')).toBeInTheDocument();
 	});
 
@@ -64,7 +68,7 @@ describe('New document page – receiver prefill', () => {
 			...baseData,
 			initialReceivers: [{ id: 'p2', firstName: 'Anna', lastName: 'Schmidt' }]
 		};
-		render(Page, { data });
+		render(Page, { data, form: null });
 		const hidden = document.querySelector<HTMLInputElement>('input[name="receiverIds"]');
 		expect(hidden?.value).toBe('p2');
 	});
diff --git a/frontend/src/routes/persons/[id]/+page.server.ts b/frontend/src/routes/persons/[id]/+page.server.ts
index 4a9bbcc9..0bb0ca2a 100644
--- a/frontend/src/routes/persons/[id]/+page.server.ts
+++ b/frontend/src/routes/persons/[id]/+page.server.ts
@@ -31,8 +31,10 @@ export const actions = {
 		const lastName = formData.get('lastName')?.toString().trim();
 		const alias = formData.get('alias')?.toString().trim() || undefined;
 		const notes = formData.get('notes')?.toString().trim() || undefined;
-		const birthYear = formData.get('birthYear')?.toString().trim() || undefined;
-		const deathYear = formData.get('deathYear')?.toString().trim() || undefined;
+		const birthYearStr = formData.get('birthYear')?.toString().trim();
+		const deathYearStr = formData.get('deathYear')?.toString().trim();
+		const birthYear = birthYearStr ? parseInt(birthYearStr, 10) : undefined;
+		const deathYear = deathYearStr ? parseInt(deathYearStr, 10) : undefined;
 
 		if (!firstName || !lastName) {
 			return fail(400, { updateError: 'Vor- und Nachname sind Pflichtfelder.' });