refactor(server): canonicalize service API (#31049)

packages/server/src/handlers/fs.ts

@@ -0,0 +1,13 @@
+import { FileSystem } from "@opencode-ai/core/filesystem"
+import { Effect } from "effect"
+import { HttpApiBuilder } from "effect/unstable/httpapi"
+import { Api } from "../api"
+import { response } from "../groups/location"
+
+export const FileSystemHandler = HttpApiBuilder.group(Api, "server.fs", (handlers) =>
+  Effect.gen(function* () {
+    return handlers
+      .handle("fs.read", (ctx) => response(FileSystem.Service.use((fs) => fs.read(ctx.query))))
+      .handle("fs.list", (ctx) => response(FileSystem.Service.use((fs) => fs.list(ctx.query))))
+  }),
+)