fix(#248): add console.error to typeahead catch block and expose setActiveIndex

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

frontend/src/lib/hooks/__tests__/useTypeahead.svelte.test.ts

@@ -66,4 +66,22 @@ describe('createTypeahead', () => {
 		expect(fetchUrl).toHaveBeenCalledTimes(1);
 		expect(fetchUrl).toHaveBeenCalledWith('foo');
 	});
+
+	it('fetch error logs to console.error and sets results to empty', async () => {
+		const fetchUrl = vi.fn().mockRejectedValue(new Error('network error'));
+		const errorSpy = vi.spyOn(console, 'error').mockImplementation(() => {});
+		const ta = createTypeahead({ fetchUrl, debounceMs: 0 });
+		ta.setQuery('foo');
+		await vi.advanceTimersByTimeAsync(0);
+		expect(errorSpy).toHaveBeenCalled();
+		expect(ta.results).toEqual([]);
+		errorSpy.mockRestore();
+	});
+
+	it('setActiveIndex updates activeIndex', () => {
+		const ta = createTypeahead({ fetchUrl: vi.fn().mockResolvedValue([]) });
+		expect(ta.activeIndex).toBe(-1);
+		ta.setActiveIndex(2);
+		expect(ta.activeIndex).toBe(2);
+	});
 });

frontend/src/lib/hooks/useTypeahead.svelte.ts

@@ -23,7 +23,8 @@ export function createTypeahead<T>(options: Options<T>) {
 			loading = true;
 			try {
 				results = await fetchUrl(q);
-			} catch {
+			} catch (e) {
+				console.error('typeahead fetch error', e);
 				results = [];
 			} finally {
 				loading = false;
@@ -36,6 +37,10 @@ export function createTypeahead<T>(options: Options<T>) {
 		activeIndex = -1;
 	}
 
+	function setActiveIndex(idx: number) {
+		activeIndex = idx;
+	}
+
 	function select(item: T) {
 		onSelect?.(item);
 		close();
@@ -64,6 +69,7 @@ export function createTypeahead<T>(options: Options<T>) {
 			return activeIndex;
 		},
 		setQuery,
+		setActiveIndex,
 		close,
 		select,
 		openWith