Improve mobile selectors and sheet inputs

Keep sheet text inputs native-owned to avoid React Native controlled input flicker during fast typing. Add reset keys for fields that need programmatic clears, and move model, mode, and thinking pickers onto shared combobox rows with fuzzy ranked search and native virtualization.

packages/app/src/components/pair-link-modal.tsx

@@ -8,10 +8,11 @@ import { useHosts, useHostMutations } from "@/runtime/host-runtime";
 import { decodeOfferFragmentPayload, normalizeHostPort } from "@/utils/daemon-endpoints";
 import { connectToDaemon } from "@/utils/test-daemon-connection";
 import { ConnectionOfferSchema } from "@server/shared/connection-offer";
-import { AdaptiveModalSheet, AdaptiveTextInput } from "./adaptive-modal-sheet";
+import { AdaptiveModalSheet, AdaptiveTextInput, type SheetHeader } from "./adaptive-modal-sheet";
 import { Button } from "@/components/ui/button";
 
 const FLEX_ONE_STYLE = { flex: 1 } as const;
+const PAIR_LINK_HEADER: SheetHeader = { title: "Paste pairing link" };
 
 const styles = StyleSheet.create((theme) => ({
   helper: {
@@ -169,7 +170,7 @@ export function PairLinkModal({ visible, onClose, onCancel, onSaved }: PairLinkM
 
   return (
     <AdaptiveModalSheet
-      title="Paste pairing link"
+      header={PAIR_LINK_HEADER}
       visible={visible}
       onClose={handleClose}
       testID="pair-link-modal"