fix(web): format tool-call JSON previews as code - #5
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- Split labeled JSON payloads from tool-call summaries - Render JSON previews with monospace styling while preserving plain text
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What Changed
Format JSON tool-call previews with monospace styling while preserving any leading tool label. Truncated JSON payloads are detected by shape and rendered without affecting ordinary text previews. Added focused tests for labeled, truncated, bare, and non-JSON previews.
Why
Tool-call JSON was difficult to scan in the timeline because it used regular text styling. Rendering payloads as code improves readability while supporting provider summaries that may be truncated before they form valid JSON.
UI Changes
The web timeline now displays tool-call JSON payloads in a monospace font. No screenshots included.
Checklist