## What changed
- Add compact renderers for commands, MCP calls, computer activity, patches, and plans, with bounded previews and retained transcript details.
- Preserve logical source text, styles, and hyperlink metadata across wrapping so transcript copying can exclude display gutters while retaining meaningful labels. Wrap diff text at grapheme boundaries.
- Add activity identities, ordered detail retention, and deduplicated warning metadata to history cells.
- Hide background terminal interaction notices from chat while retaining them in the transcript, and keep local image-only user messages visible without duplicating image placeholders.
## Testing
Add regression and snapshot coverage for compact previews, retained patch diagnostics, wrapped source text and hyperlinks, question-and-answer labels, and local image placeholders.
GitOrigin-RevId: fd82fadd8ed3418eaba2bc74c4327d9c63d7e997
321c50fc2c