hass-eink-dashboard

Implement a widget's SVG template and Python context builder. Creates templates/{type}.svg.j2 and widgets/{type}.py with _build_{type}_context(). Follows TDD green phase — makes existing tests pass.

Write TDD tests for a widget type: structural tests (borders, dividers), alignment tests (icon centering), and scaling tests (proportional sizing). Uses test helpers from tests/helpers.py.

Add TypeScript types in ha.d.ts and editor schema in eink-dashboard-editor.ts for a new or updated widget type; also handles deprecating an old type (remove from picker, keep schema, add @deprecated JSDoc). Canvas preview was replaced by server-rendered SVGs in step 4.1; no frontend renderer is needed.