✨ New Features & ⬆️ Improvements & 🐛 Bug fixes

✨ New

• 🎨 Theme colour picker (#272) — every colour field in the editor now has a dropdown of Home Assistant's named theme colours (Primary, Accent, Red … White) with live swatches. Picking one stores the theme-resolved colour so the chart always matches your active theme. Free-form entry (hex, rgb(), var(--x-color), threshold, entity IDs and {{ templates }}) still works via the text box + colour swatch next to it.

🛠 Editor improvement

• Consistent height across all editor inputs, selects and colour fields.

🐛 Fixes

• Sparkline with show_state: false — the sparkline now renders even when the state value is hidden. show_state controls only the name/value text, show_graph controls the graph (independent, matching normal mode).
• Compact legend + height: auto (#270) — fixed the chart overflowing and the x-axis being clipped when combining height: auto, the compact legend and grid_options.rows.
• state_adaptive_color + state_map (#271) — adaptive colouring now uses the mapped state colour correctly.