chore: sandbox refactor 2 (#4653)

Revert the revert and fix the UI issue

codex-rs/core/src/safety.rs

@@ -125,9 +125,10 @@ pub fn assess_command_safety(
     // the session _because_ they know it needs to run outside a sandbox.
 
     if is_known_safe_command(command) || approved.contains(command) {
+        let user_explicitly_approved = approved.contains(command);
         return SafetyCheck::AutoApprove {
             sandbox_type: SandboxType::None,
-            user_explicitly_approved: false,
+            user_explicitly_approved,
         };
     }
 
@@ -380,7 +381,7 @@ mod tests {
             safety_check,
             SafetyCheck::AutoApprove {
                 sandbox_type: SandboxType::None,
-                user_explicitly_approved: false,
+                user_explicitly_approved: true,
             }
         );
     }