refactor(core): consolidate filesystem services (#30447)

packages/opencode/test/session/llm-native-recorded.test.ts

@@ -1,6 +1,6 @@
 import { NodeFileSystem } from "@effect/platform-node"
 import { SessionLegacy } from "@opencode-ai/core/session/legacy"
-import { AppFileSystem } from "@opencode-ai/core/filesystem"
+import { FSUtil } from "@opencode-ai/core/fs-util"
 import { ModelsDev } from "@opencode-ai/core/models-dev"
 import { LocationServiceMap } from "@opencode-ai/core/location-layer"
 import { HttpRecorder, Redactor } from "@opencode-ai/http-recorder"
@@ -272,7 +272,7 @@ const modelsFixture = Filesystem.readJson<Record<string, ModelsDev.Provider>>(
 function recordedNativeLLMLayer(scenario: RecordedScenario) {
   const auth = authLayer(scenario)
   const provider = Provider.layer.pipe(
-    Layer.provide(AppFileSystem.defaultLayer),
+    Layer.provide(FSUtil.defaultLayer),
     Layer.provide(Env.defaultLayer),
     Layer.provide(Config.defaultLayer),
     Layer.provide(auth),