fix(cli): preserve CJK agent header text

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/cli/run/output-renderer.test.ts

@@ -0,0 +1,44 @@
+import { afterEach, describe, expect, it } from "bun:test"
+
+import { renderAgentHeader } from "./output-renderer"
+
+const originalWrite = process.stdout.write.bind(process.stdout)
+
+function captureStdout(run: () => void): string {
+  const chunks: string[] = []
+  process.stdout.write = ((chunk: string | Uint8Array) => {
+    chunks.push(typeof chunk === "string" ? chunk : Buffer.from(chunk).toString("utf8"))
+    return true
+  }) as typeof process.stdout.write
+
+  try {
+    run()
+  } finally {
+    process.stdout.write = originalWrite as typeof process.stdout.write
+  }
+
+  return chunks.join("")
+}
+
+afterEach(() => {
+  process.stdout.write = originalWrite as typeof process.stdout.write
+})
+
+describe("renderAgentHeader", () => {
+  it("preserves CJK agent display names in stdout output", () => {
+    const output = captureStdout(() => {
+      renderAgentHeader("Sisyphus - 主脑", "zhipu/glm-5.1", "xhigh", {})
+    })
+
+    expect(output).toContain("Sisyphus - 主脑")
+    expect(output).toContain("zhipu/glm-5.1")
+  })
+
+  it("normalizes decomposed Unicode before rendering", () => {
+    const output = captureStdout(() => {
+      renderAgentHeader("헤파", null, null, {})
+    })
+
+    expect(output).toContain("헤파")
+  })
+})