MAESTRO: default DNS toggle off

Auto Run Docs/SpecKit-web-header-analyzer-Phase-04-Test-Selection.md

@@ -34,7 +34,7 @@ This phase implements the test selection panel and analysis configuration contro
 - [x] Test selector renders all 106+ tests with checkboxes
 - [x] Select All / Deselect All buttons work correctly
 - [x] Search/filter narrows visible tests by name
-- [ ] DNS resolution toggle defaults to off
+- [x] DNS resolution toggle defaults to off
 - [ ] Decode-all toggle is functional
 - [ ] All controls are keyboard accessible (Tab, Enter, Space)
 - [ ] Linting passes (`ruff check backend/`, `npx eslint src/`)

frontend/src/__tests__/AnalysisControls.test.tsx

@@ -96,11 +96,8 @@ afterEach(() => {
 describe("AnalysisControls", () => {
   it("renders toggles with default off state", async () => {
     setupFetchMock(sampleTests);
-    const config: AnalysisConfig = { testIds: [], resolve: false, decodeAll: false };
 
-    const { container } = render(
-      <AnalysisControls config={config} onChange={() => undefined} />,
-    );
+    const { container } = render(<AnalysisControls onChange={() => undefined} />);
 
     await act(async () => {
       await flushPromises();

frontend/src/components/AnalysisControls.tsx

@@ -13,10 +13,16 @@ import type { AnalysisConfig } from "../types/analysis";
 import TestSelector from "./TestSelector";
 
 type AnalysisControlsProps = {
-  config: AnalysisConfig;
+  config?: AnalysisConfig;
   onChange: (next: AnalysisConfig) => void;
 };
 
+const defaultConfig: AnalysisConfig = {
+  testIds: [],
+  resolve: false,
+  decodeAll: false,
+};
+
 const handleToggleKeyDown = (
   event: KeyboardEvent<HTMLButtonElement>,
   onToggle: () => void,
@@ -27,7 +33,10 @@ const handleToggleKeyDown = (
   }
 };
 
-export default function AnalysisControls({ config, onChange }: AnalysisControlsProps) {
+export default function AnalysisControls({
+  config = defaultConfig,
+  onChange,
+}: AnalysisControlsProps) {
   const updateTests = (nextTestIds: number[]) => {
     onChange({ ...config, testIds: nextTestIds });
   };