Draw a wall panel at the size it was drawn for

A dashboard whose canvas matches the screen came out at 95% of it: the
panel and view routes inset the canvas by a further 16px, on top of the
margin the grid already keeps from its own edges. Two margins, one of
them costing the scale. The padding now applies only to the stacked
phone layout, which has no canvas to shrink.

A slider's tick labels are the third row of a control that has three,
and the first thing a short tile runs out of; `ticks: false` drops them
and keeps the reading and the track. The house's two sliders set it.

The 1024x600 preset is named for what it is rather than for a diagonal
it may not have — the same resolution is sold as a seven-inch panel and
as a ten-inch one.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012n6CehUsHYYUXJ48rxaD18

frontend/src/components/Dashboard/widgets.tsx

@@ -494,7 +494,11 @@ function SliderWidget({ widget, dashboard }: WidgetProps) {
         max={num(cfg.max, 100)}
         step={num(cfg.step, 1)}
         unit={unit}
-        ticks
+        // On by default, because a slider without them says how far along it
+        // is and not what that means. Off is for a short tile: they are the
+        // last row of a control that has three, and on a seven-inch panel
+        // that row is the difference between fitting and being cut off.
+        ticks={cfg.ticks !== false}
         label={widget.title || target}
         disabled={locked}
         onCommit={send}