Let plugins control modal layout, scrolling and clipboard actions (#4392)

* feat(plugins): support modal body layout, scrolling and clipboard actions

* fix(app): keep native scroll dependencies out of web imports

* fix(nix): sync dependency hash for plugin native types

* test(plugins): express modal QA as user journeys

packages/plugin/src/react-native.ts

@@ -1,4 +1,22 @@
-import type { ComponentType, FunctionComponent, ReactNode } from "react";
+import type {
+  ComponentType,
+  FunctionComponent,
+  ReactNode,
+  ForwardRefExoticComponent,
+  RefAttributes,
+  ReactElement,
+  Ref,
+} from "react";
+import type {
+  StyleProp,
+  ViewStyle,
+  ScrollView as NativeScrollView,
+  ScrollViewProps,
+  FlatList as NativeFlatList,
+  FlatListProps,
+  TextInput as NativeTextInput,
+  TextInputProps,
+} from "react-native";
 import type { PluginIconProps } from "./contracts.js";
 
 export interface ModalProps {
@@ -11,6 +29,12 @@ export interface ModalProps {
 
 export interface ModalContentProps {
   children: ReactNode;
+  /** Paint the full body below the header. */
+  style?: StyleProp<ViewStyle>;
+  /** Overrides the default 24px padding and 16px gap. Safe-area clearance stays host-owned. */
+  contentContainerStyle?: StyleProp<ViewStyle>;
+  /** Default true. Set false for a bounded body with your own ScrollView or FlatList. */
+  scrollable?: boolean;
 }
 
 export interface ModalComponent extends FunctionComponent<ModalProps> {
@@ -35,3 +59,18 @@ export declare function useToast(): ToastApi;
 export declare function useRevealedText(text: string, phase: "streaming" | "complete"): string;
 
 export type { PluginIconProps } from "./contracts.js";
+
+/** React Native scrolling with the host's sheet gestures when rendered inside a sheet. */
+export declare const ScrollView: ForwardRefExoticComponent<
+  ScrollViewProps & RefAttributes<NativeScrollView>
+>;
+export declare function FlatList<Item>(
+  props: FlatListProps<Item> & { ref?: Ref<NativeFlatList<Item>> },
+): ReactElement;
+/** Copies text to this client's clipboard. Rejects when copying is unavailable or denied. */
+export declare function copyText(text: string): Promise<void>;
+
+/** Native input focus integrated with modal keyboard positioning. */
+export declare const TextInput: ForwardRefExoticComponent<
+  TextInputProps & RefAttributes<NativeTextInput>
+>;