ECharts chart template integration

[zhenyu-cpu]

Question

How should ECharts chart templates be integrated into the designer?

Context

The reference site shows a dedicated '图表' (Charts) tab with chart type options:

• Line, Bar, Pie, Radar, Gauge, Scatter, Funnel charts
• Each chart type has pre-configured templates
• Charts render in the canvas as printable elements

Current state

No chart support exists in the current demo.

Key decisions needed

1. Should echarts be a peer dependency or bundled?
2. How to render charts in the canvas (echarts instance per chart element)?
3. Chart data binding — inline data vs external data source?
4. Chart print compatibility — render to canvas for printing?

Depends on

Map issue #213