Revert "fix: remove redudant export for client plugin"

This reverts commit 48b259100b9cfe2e372eb9fe0924a783988f5a8e.

packages/client/connection/src/client/index.ts

@@ -21,13 +21,16 @@ export type {
   ClientRequest, ServerResponse, ServerRequest, ClientResponse, RpcMessage, RpcReceipt,
   IApiClient, SessionId, SessionEvent, ContentBlock, StreamChunk,
 } from './api.ts'
-export { RpcId, AbstractApiClient, transportError } from './api.ts'
+export { RpcId, AbstractApiClient, resultOf, transportError } from './api.ts'
 
-// ---- Connection loop types (part of the ConnectionHandle.start contract;
-// the controller class itself stays package-internal — apply owns the loop,
-// tests reach it via src) ----
+// ---- Connection loop ----
+export { ConnectionController } from './connection.ts'
 export type { ConnectionConfig, ConnectionSinks, ConnectionState }
 
+// ---- Platform client subclasses ----
+export { WebApiClient } from './web-api-client.ts'
+export { FixtureApiClient, createFixtureApi } from './fixture.ts'
+
 
 /** Required services (none — this is the wire root). */
 export const inject: string[] = []