fix(acp): replace EOL with newline for content splitting

- Replace `EOL` from `node:os` with `\n` for consistent line splitting in ACP connection output processing
- This ensures cross-platform compatibility since `EOL` is platform-specific while `\n` is universally used in text decoding
- The change maintains the same behavior on all platforms by using standard newline characters

packages/cli/src/zed-integration/acp.ts

@@ -7,7 +7,6 @@
 /* ACP defines a schema for a simple (experimental) JSON-RPC protocol that allows GUI applications to interact with agents. */
 
 import { z } from 'zod';
-import { EOL } from 'node:os';
 import * as schema from './schema.js';
 export * from './schema.js';
 
@@ -173,7 +172,7 @@ class Connection {
     const decoder = new TextDecoder();
     for await (const chunk of output) {
       content += decoder.decode(chunk, { stream: true });
-      const lines = content.split(EOL);
+      const lines = content.split('\n');
       content = lines.pop() || '';
 
       for (const line of lines) {