[BUG] Subagent actions no longer shown in --verbose mode

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I have a convo where the AI created a subagent to do a job (I did not create it with /subtask, the agent did it itself). I can no longer show the subagent inputs, outputs or actions; even when I toggle verbose mode. ctrl-o and ctrl-e do not help. The subagent transcript jsonl is still on disk, but I see no way to open it in the ui.

What Should Happen?

It should be possible to see subagent history, actions, and inputs/ouputs in the claude tui somehow, like there used to be.

Error Messages/Logs

Steps to Reproduce

Exact process I used:

1. $ claude
2. Tell the agent the following prompt:

I'm testing the subagent ui. Please send a subagent to read a file, say something it read from the file(so it would be visible if the agent was in an interactive session), read a different file, say something else from the other 
  file,  and then report back to you what files it read and what it quoted from them. Make sure to tell it to do those exact things, since I'm testing ability to see repeated turns, file reads, returned report, and intermediate    
  speech. 

And it should do it.

1. Press ctrl-c twice to exit
2. Look at the printed resume line and add --verbose to it, ex:

``` terminal
Resume this session with:
claude --resume b61d9ce8-eafe-4d97-81bd-e376c03bfe52

$ claude --verbose --resume b61d9ce8-eafe-4d97-81bd-e376c03bfe52

5. Note that the info cannot be seen
6. Do ` /config verbose=true ` just to be extra sure, and note still no info can be seen
7. Press ctrl-o, ctrl-e  and note that neither allows the info to be seen, despite claiming to show the detailed transcript.
8. Prompt `Ok, now do it again so I can compare in verbose mode.`
9. press ctrl-o. Note that the prompt to the second agent is now visible, but not its output or intermediate steps. The first agent still lacks all info.
10. Press ctrl-c ctrl-c to close
11. reopen with the command from step 4.
12. press ctrl-o, ctrl-e, and note that the transcript is unchanged from step 9

### Claude Model

Sonnet (default)

### Is this a regression?

Yes, this worked in a previous version

### Last Working Version

Unknown

### Claude Code Version

2.1.236

### Platform

Anthropic API

### Operating System

Ubuntu/Debian Linux

### Terminal/Shell

VS Code integrated terminal

### Additional Information

_No response_