fix(hooks): force child_process PTY and fix settings structure in tests

packages/test-utils/src/test-rig.ts

@@ -539,6 +539,7 @@ export class TestRig {
     return {
       ...cleanEnv,
       GEMINI_CLI_HOME: this.homeDir!,
+      GEMINI_PTY_INFO: 'child_process',
       ...extraEnv,
     };
   }