fix: 修正 logo 中 N 和 G 字母造型

N 添加对角线笔画（█▄ █），G 添加内横杠（█ ▀█），
避免与 O 字母造型雷同。同步更新 ui.ts 中的硬编码 wordmark。

packages/opencode/test/cli/acp/acp-test-client.ts

@@ -0,0 +1,97 @@
+import { expect } from "bun:test"
+import type { SessionConfigOption, SessionConfigSelectOption } from "@agentclientprotocol/sdk"
+import { Duration, Effect } from "effect"
+import type { AcpHandle } from "../../lib/cli-process"
+
+type JsonRpcRequest = {
+  readonly jsonrpc: "2.0"
+  readonly id: number
+  readonly method: string
+  readonly params?: unknown
+}
+
+type JsonRpcResponse<T = unknown> = {
+  readonly jsonrpc: "2.0"
+  readonly id: number
+  readonly result?: T
+  readonly error?: unknown
+}
+
+type JsonRpcNotification<T = unknown> = {
+  readonly jsonrpc: "2.0"
+  readonly method: string
+  readonly params?: T
+}
+
+export type AcpClient = {
+  readonly request: <T>(method: string, params?: unknown) => Effect.Effect<JsonRpcResponse<T>, unknown>
+  readonly receive: Effect.Effect<unknown>
+  readonly waitForNotification: <T>(
+    method: string,
+    predicate: (params: T) => boolean,
+    timeoutMs?: number,
+  ) => Effect.Effect<JsonRpcNotification<T>, unknown>
+}
+
+export function createAcpClient(acp: AcpHandle): AcpClient {
+  const state = { nextId: 1 }
+
+  const request = <T>(method: string, params?: unknown) =>
+    Effect.gen(function* () {
+      const id = state.nextId++
+      const message: JsonRpcRequest =
+        params === undefined ? { jsonrpc: "2.0", id, method } : { jsonrpc: "2.0", id, method, params }
+      yield* acp.send(message)
+
+      while (true) {
+        const received = yield* acp.receive.pipe(Effect.timeout(Duration.seconds(15)))
+        if (isJsonRpcResponse<T>(received) && received.id === id) return received
+      }
+    })
+
+  const waitForNotification = <T>(method: string, predicate: (params: T) => boolean, timeoutMs = 15_000) =>
+    Effect.gen(function* () {
+      while (true) {
+        const received = yield* acp.receive.pipe(Effect.timeout(Duration.millis(timeoutMs)))
+        if (!isJsonRpcNotification<T>(received)) continue
+        if (received.method === method && predicate(received.params as T)) return received
+      }
+    })
+
+  return {
+    request,
+    receive: acp.receive,
+    waitForNotification,
+  }
+}
+
+export function expectOk<T>(response: JsonRpcResponse<T>) {
+  expect(response.error).toBeUndefined()
+  expect(response.result).toBeDefined()
+  return response.result as T
+}
+
+export function selectConfigOption(options: SessionConfigOption[] | null | undefined, id: string) {
+  return options?.find(
+    (option): option is Extract<SessionConfigOption, { type: "select" }> =>
+      option.id === id && option.type === "select",
+  )
+}
+
+export function firstAlternateValue(option: Extract<SessionConfigOption, { type: "select" }>) {
+  return flattenSelectOptions(option).find((item) => item.value !== option.currentValue)?.value
+}
+
+export function flattenSelectOptions(option: Extract<SessionConfigOption, { type: "select" }>) {
+  return option.options.flatMap((item): SessionConfigSelectOption[] => ("value" in item ? [item] : item.options))
+}
+
+function isJsonRpcResponse<T>(input: unknown): input is JsonRpcResponse<T> {
+  if (!input || typeof input !== "object") return false
+  return "id" in input && "jsonrpc" in input
+}
+
+function isJsonRpcNotification<T>(input: unknown): input is JsonRpcNotification<T> {
+  if (!input || typeof input !== "object") return false
+  return "method" in input && !("id" in input) && "jsonrpc" in input
+}