Highlight user input in scroll history #1862
Description
Describe the feature or problem you'd like to solve
When scrolling back through a long Copilot CLI session, it's difficult to distinguish my prompts from the agent's responses. User input blends in with the rest of the output, making it hard to find what I asked and navigate the conversation history.
Proposed solution
Visually highlight user input lines with a distinct background color, text color, or border so they stand out when scrolling. This could follow the current terminal theme or be configurable via /theme or a config option.
Example prompts or workflows
- User submits a prompt → the input line is rendered with a highlighted background (e.g., subtle color band) that persists in the scroll history.
- Scrolling up through a 30-minute session → user prompts are immediately identifiable among agent responses, tool output, and status messages.
Additional context
