The events card header now carries four pill buttons (注入/压缩/剪枝/切换) instead of a select: all picked by default, clicking an unpicked kind adds it (A -> A+B -> ...), clicking a picked one removes it, and removing the last one resets to all. Each kind gets a distinct hue shared between the pills and the row chips (绿/红/紫/蓝); the hint subtitle and the filter dropdown are gone.