Stabilize mobile auth session handling

lib/account-actions.ts

@@ -1,24 +1,33 @@
 import { router } from "expo-router";
 import { Alert } from "react-native";
+import type { createAuthClient } from "better-auth/react";
 
 import type { RemoveAccountResult } from "@/contexts/AccountsContext";
+import { performAuthReset } from "@/lib/auth-session";
+
+type AuthClient = ReturnType<typeof createAuthClient>;
 
 type FinishAccountRemovalInput = {
   result: RemoveAccountResult;
+  authClient: AuthClient;
   clearActiveAccount: () => Promise<void>;
-  signOut: () => Promise<unknown>;
+  activeAccountId: string | null;
 };
 
 /** Navigate to sign-in when the last saved account was removed. */
 export async function finishAccountRemoval({
   result,
+  authClient,
   clearActiveAccount,
-  signOut,
+  activeAccountId,
 }: FinishAccountRemovalInput): Promise<void> {
   if (result.remainingCount > 0) return;
 
-  await signOut();
-  await clearActiveAccount();
+  await performAuthReset({
+    authClient,
+    clearActiveAccount,
+    activeAccountId,
+  });
   router.replace("/(auth)/sign-in");
 }