refactor(file): use effectful HttpApi group builder

Build the file HttpApi handlers with an effectful group callback so the file service is resolved once at layer construction time and the endpoint handlers close over the resulting methods.

packages/opencode/src/server/instance/httpapi/file.ts

@@ -58,24 +58,27 @@ const Api = HttpApi.make("file")
     }),
   )
 
-const list = Effect.fn("FileHttpApi.list")(function* (ctx: { query: { path?: string } }) {
-  const svc = yield* File.Service
-  return Schema.decodeUnknownSync(Schema.Array(File.Node))(yield* svc.list(ctx.query.path))
-})
+const FileLive = HttpApiBuilder.group(
+  Api,
+  "file",
+  Effect.fn("FileHttpApi.handlers")(function* (handlers) {
+    const svc = yield* File.Service
 
-const content = Effect.fn("FileHttpApi.content")(function* (ctx: { query: { path: string } }) {
-  const svc = yield* File.Service
-  return Schema.decodeUnknownSync(File.Content)(yield* svc.read(ctx.query.path))
-})
+    const list = Effect.fn("FileHttpApi.list")(function* (ctx: { query: { path?: string } }) {
+      return Schema.decodeUnknownSync(Schema.Array(File.Node))(yield* svc.list(ctx.query.path))
+    })
 
-const status = Effect.fn("FileHttpApi.status")(function* () {
-  const svc = yield* File.Service
-  return Schema.decodeUnknownSync(Schema.Array(File.Info))(yield* svc.status())
-})
+    const content = Effect.fn("FileHttpApi.content")(function* (ctx: { query: { path: string } }) {
+      return Schema.decodeUnknownSync(File.Content)(yield* svc.read(ctx.query.path))
+    })
 
-const FileLive = HttpApiBuilder.group(Api, "file", (handlers) =>
-  handlers.handle("list", list).handle("content", content).handle("status", status),
-)
+    const status = Effect.fn("FileHttpApi.status")(function* () {
+      return Schema.decodeUnknownSync(Schema.Array(File.Info))(yield* svc.status())
+    })
+
+    return handlers.handle("list", list).handle("content", content).handle("status", status)
+  }),
+).pipe(Layer.provide(File.defaultLayer))
 
 const web = lazy(() =>
   HttpRouter.toWebHandler(