v8.1.0

New features

• Added vue-echarts/graphic and #graphic slot support to build and update ECharts graphic trees with Vue components.

Fixes

• Fixed theme-switch regressions by replaying the latest option after setTheme, so delayed data assignment (e.g. async graph series.data/links) no longer disappears on theme changes (#972).
• Fixed smart-update normalization when option keys migrate across shapes (e.g. object to array/scalar), preventing valid next values from being overwritten during updates.
• Fixed an update regression in vue-echarts/graphic slot behavior that could break some demos and runtime updates (#976).