## 1. Implementation

- [ ] 1.1 Read current ToolCallCard CSS styling in dark.tcss
- [ ] 1.2 Update margin from `1 0 1 1` to `0 0 0 1` (remove top/bottom margins, keep left)
- [ ] 1.3 Apply same change to light.tcss for consistency
- [ ] 1.4 Test with multiple consecutive tool calls to verify spacing improvement