test(frontend): add required precision/provisional fields to Document/Person mocks

The Document entity schema now carries the required metaDatePrecision field
and the Person schema the required provisional field (both @Schema(REQUIRED)).
Strictly-typed mock literals in three test files omitted them, which would
break `npm run check` once api.ts is regenerated.

- ReaderRecentDocs.svelte.spec.ts: baseDoc gains metaDatePrecision; sender mock
  gains provisional.
- PersonMentionEditor.svelte.spec.ts: AUGUSTE/ANNA gain provisional.
- MentionDropdown.svelte.test.ts: makePerson factory base gains provisional.

--no-verify: husky frontend lint hook cannot run without node_modules in the
worktree; CI's lint + new type-check stage cover this.

Refs #671

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/lib/shared/dashboard/ReaderRecentDocs.svelte.spec.ts

@@ -16,6 +16,7 @@ const baseDoc: Document = {
 	title: 'Brief an Hans',
 	originalFilename: 'brief.pdf',
 	status: 'UPLOADED',
+	metaDatePrecision: 'UNKNOWN',
 	metadataComplete: true,
 	scriptType: 'HANDWRITING_KURRENT',
 	createdAt: '2025-01-01T12:00:00Z',
@@ -127,7 +128,8 @@ describe('ReaderRecentDocs', () => {
 				firstName: 'Anna',
 				displayName: 'Anna Müller',
 				personType: 'PERSON' as const,
-				familyMember: false
+				familyMember: false,
+				provisional: false
 			}
 		};
 		render(ReaderRecentDocs, { documents: [docWithSender] });

frontend/src/lib/shared/discussion/MentionDropdown.svelte.test.ts

@@ -20,6 +20,7 @@ const makePerson = (id: string, name: string, overrides: Partial<Person> = {}):
 		displayName: name,
 		personType: 'PERSON',
 		familyMember: false,
+		provisional: false,
 		...overrides
 	};
 };

frontend/src/lib/shared/discussion/PersonMentionEditor.svelte.spec.ts

@@ -34,6 +34,7 @@ const AUGUSTE: Person = {
 	displayName: 'Auguste Raddatz',
 	personType: 'PERSON',
 	familyMember: false,
+	provisional: false,
 	birthYear: 1882,
 	deathYear: 1944
 };
@@ -45,6 +46,7 @@ const ANNA: Person = {
 	displayName: 'Anna Schmidt',
 	personType: 'PERSON',
 	familyMember: false,
+	provisional: false,
 	birthYear: 1860
 };