Zero Dependency Chart Rendering With Local Canvas Execution

via “zero-dependency chart rendering with local canvas execution”

** - Generate visual charts using [ECharts](https://echarts.apache.org) with AI MCP dynamically, used for chart generation and data analysis.

Unique: Implements fully self-contained chart rendering using Node.js canvas without external service calls. The rendering engine in src/utils/render.ts executes ECharts JavaScript in a Node.js context with canvas bindings, eliminating external dependencies while maintaining compatibility with the full ECharts feature set.

vs others: More self-contained than services like Plotly Cloud or QuickChart because rendering happens locally; more reliable than browser-based rendering (Puppeteer) because it avoids browser process management overhead