feat: add persisted batch text testing

frontend/src/components/assistant-editor/debug-preview.tsx

@@ -334,7 +334,7 @@ export function DebugDrawer({
         )}
       </div>
       {debugMode === "auto" ? (
-        <AutoTestPanel assistantId={assistantId} autoTest={autoTest} />
+        <AutoTestPanel autoTest={autoTest} />
       ) : (
         <DebugVoicePanel
           view={view}
@@ -355,10 +355,8 @@ export function DebugDrawer({
 }
 
 function AutoTestPanel({
-  assistantId,
   autoTest,
 }: {
-  assistantId: string | null;
   autoTest: ReturnType<typeof useAutoTestRunner>;
 }) {
   const {
@@ -379,7 +377,6 @@ function AutoTestPanel({
       <div className="shrink-0 border-t border-hairline bg-card p-3">
         <AutoTestRunBar
           state={state}
-          assistantId={assistantId}
           onSelectCase={selectCase}
           onClearCase={clearCase}
           onStart={start}