Change tool-call pills from \`<div>\` to \`<details>/<summary>\` so users can collapse/expand to inspect arguments and results. Collapsed by default, disclosure triangle in the header. Reference: [tool-calling-demo app.js](https://github.com/rdwj/tool-calling-demo/blob/main/calculus-ui/static/app.js)
Change tool-call pills from `
` so users can collapse/expand to inspect arguments and results. Collapsed by default, disclosure triangle in the header.
Reference: tool-calling-demo app.js