fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/core/src/effect/layer-node-platform.ts

@@ -0,0 +1,12 @@
+import { NodeFileSystem, NodePath } from "@effect/platform-node"
+import { LLMClient, RequestExecutor } from "@opencode-ai/llm/route"
+import { FetchHttpClient } from "effect/unstable/http"
+import { LayerNode } from "./layer-node"
+
+export const filesystem = LayerNode.make(NodeFileSystem.layer, [])
+export const path = LayerNode.make(NodePath.layer, [])
+export const httpClient = LayerNode.make(FetchHttpClient.layer, [])
+export const requestExecutor = LayerNode.make(RequestExecutor.layer, [httpClient])
+export const llmClient = LayerNode.make(LLMClient.layer, [requestExecutor])
+
+export * as LayerNodePlatform from "./layer-node-platform"