Petar Petrov b8c201b6d3 Render echarts tooltips with Lit templates (#52235) ...

* Render echarts tooltips with Lit templates

Replace raw HTML string interpolation in echarts tooltip formatters with Lit templates so user-controlled fields (entity friendly_name, device names, node labels) are auto-escaped instead of relying on per-string filterXSS. ha-chart-base now wraps any function tooltip.formatter into a stable per-formatter container and handles Lit TemplateResult / nothing / null returns; the public HaECOption type lets charts express Lit-returning formatters without per-callsite casts.

* Simplify

* Refactor _getSeries

* Small fix

* Fix merge mistake

* Marker component and wrapper test

2026-05-28 14:27:47 +02:00

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chart

Render echarts tooltips with Lit templates (#52235)

2026-05-28 14:27:47 +02:00