feat: Detach prepare logic from useFlow

Author: anakin_karrot

extensions/link/src/future/Link.tsx

@@ -32,9 +32,7 @@ export interface LinkProps<K extends RegisteredActivityName>
 
 export function Link<K extends RegisteredActivityName>(props: LinkProps<K>) {
   const config = useConfig();
-  const { push, replace } = useFlow({
-    reachableActivities: [props.activityName],
-  });
+  const { push, replace } = useFlow();
 
   const href = useMemo(() => {
     const match = config.activities.find((r) => r.name === props.activityName);

integrations/react/src/future/useActivityPreparation.ts

@@ -0,0 +1,10 @@
+import type { RegisteredActivityName } from "@stackflow/config";
+import { useFlow } from "./useFlow";
+
+export function useActivityPreparation(activities: RegisteredActivityName[]) {
+  const actions = useFlow();
+
+  for (const activityName of activities) {
+    actions.prepare(activityName);
+  }
+}

integrations/react/src/future/useFlow.ts

@@ -1,4 +1,3 @@
-import type { RegisteredActivityName } from "@stackflow/config";
 import { useCoreActions } from "../__internal__/core";
 import type { Actions } from "./Actions";
 import { useActivityComponentMap } from "./ActivityComponentMapProvider";
@@ -10,11 +9,7 @@ export type FlowOutput = {
   useFlow: () => Actions;
 };
 
-export interface UseFlowOptions {
-  reachableActivities?: RegisteredActivityName[];
-}
-
-export function useFlow(options?: UseFlowOptions): Actions {
+export function useFlow(): Actions {
   const coreActions = useCoreActions();
   const config = useConfig();
   const activityComponentMap = useActivityComponentMap();
@@ -26,11 +21,5 @@ export function useFlow(options?: UseFlowOptions): Actions {
     loadData,
   );
 
-  if (options?.reachableActivities) {
-    for (const activityName of options.reachableActivities) {
-      actions.prepare(activityName);
-    }
-  }
-
   return actions;
 }