Introduce GEMINI_CLI_HOME for strict test isolation (#15907)

packages/core/src/code_assist/oauth2.ts

@@ -336,7 +336,7 @@ async function initOauthClient(
 
       // Note that SIGINT might not get raised on Ctrl+C in raw mode
       // so we also need to look for Ctrl+C directly in stdin.
-      stdinHandler = (data) => {
+      stdinHandler = (data: Buffer) => {
         if (data.includes(0x03)) {
           reject(
             new FatalCancellationError('Authentication cancelled by user.'),