Flatten migrations, kvs lib, fix tabs

src-web/hooks/useResponseViewMode.ts

@@ -1,7 +1,7 @@
-import { useKeyValues } from './useKeyValues';
+import { useKeyValue } from './useKeyValue';
 
 export function useResponseViewMode(requestId?: string): [string, () => void] {
-  const v = useKeyValues({
+  const v = useKeyValue<string>({
     namespace: 'app',
     key: ['response_view_mode', requestId ?? 'n/a'],
     initialValue: 'pretty',