[FEATURE] Add chat:redo action (counterpart to chat:undo)

Question

### Preflight Checklist

- [x] I have searched [existing requests](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20label%3Aenhancement) and this feature hasn't been requested yet
- [x] This is a single feature request (not multiple features)

### Problem Statement

Reopening #29875.

### Proposed Solution

See #29875.

### Alternative Solutions

_No response_

### Priority

Medium - Would be very helpful

### Feature Category

Interactive mode (TUI)

### Use Case Example

_No res

[FEATURE] Add chat:redo action (counterpart to chat:undo)

Preflight Checklist

Problem Statement

Proposed Solution

Alternative Solutions

Priority

Feature Category

Use Case Example

Additional Context