v2.17.0-dev.3

Fixed

• The hide toggle in the light list is visible again. The eye icon's shapes came from a nested html template inside the <svg>, which Lit parses in the HTML namespace — the elements existed in the DOM but never painted. The shapes now render through Lit's svg template, the icon gets an explicit color, and a resting chip makes it read as a control without needing hover.
• Curve-point tooltips no longer flicker when the cursor approaches from above.
• Hovering a shape no longer pushes the graph around.
• Save/Undo/Cancel stay reachable in long light lists — in the Lovelace card too. Layout is now driven by container queries on the card's own width and applies identically in the sidebar panel and a plain Lovelace card.
• The brightness slider lines up with the graph and always shows on it.
• Sidebar panel: no more stuck "Loading groups", and the group dropdown reopens after selecting.
• Light rows are tappable across their whole visible height.

Changed

• "Remove" is now "Remove a light", neutral until used. Red is reserved for the actual per-light confirmation.
• Shapes copy is shorter: "Pick a starting shape, then fine-tune it on the graph."

Built on the Lightener integration by @fredck, extended for the visual editor … Upstream MIT license intact.