effect(util): migrate filesystem callers to AppFileSystem.Service (#27152)

packages/opencode/test/control-plane/workspace.test.ts

@@ -8,6 +8,7 @@ import { NodeHttpServer } from "@effect/platform-node"
 import { Effect, Layer, Schema } from "effect"
 import { FetchHttpClient, HttpServer, HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
 import { eq } from "drizzle-orm"
+import { AppFileSystem } from "@opencode-ai/core/filesystem"
 import * as Log from "@opencode-ai/core/util/log"
 import { Flag } from "@opencode-ai/core/flag/flag"
 import { GlobalBus, type GlobalEvent } from "@/bus/global"
@@ -59,6 +60,7 @@ const workspaceLayer = (experimentalWorkspaces: boolean) =>
     Layer.provide(Project.defaultLayer),
     Layer.provide(Vcs.defaultLayer),
     Layer.provide(FetchHttpClient.layer),
+    Layer.provide(AppFileSystem.defaultLayer),
     Layer.provide(RuntimeFlags.layer({ experimentalWorkspaces })),
     Layer.provide(InstanceStore.defaultLayer.pipe(Layer.provide(InstanceBootstrap.defaultLayer))),
   )