fix(plan-mode): require manual ExitPlanMode approval in yolo (#1440)

src/headless.ts

@@ -1944,8 +1944,8 @@ ${SYSTEM_REMINDER_CLOSE}
           })),
           ...needsUserInput.map((ac) => {
             // One-shot headless mode has no control channel for interactive
-            // approvals. Match Claude behavior by auto-allowing EnterPlanMode
-            // while denying tools that need runtime user responses.
+            // approvals. Auto-allow plan-mode entry/exit tools, while denying
+            // tools that need runtime user responses.
             if (isHeadlessAutoAllowTool(ac.approval.toolName)) {
               return {
                 type: "approve" as const,