Show number fields with three decimals and snap dragging to the step

Number fields derived their display precision from `step`, so `step: 1`
(X/Y/Z, width, height, font size) rendered a stored 100.234 as "100" — and
because `onChange` parses the text, touching the field wrote the rounded
value back into the project. `formatNumber` now renders every number with
three decimals, independent of `step`, which is left to control the scrub
and arrow-key increment only.

Dragging now snaps to the increment's grid (`snapToStep`), so a scrub at
`step: 1` always lands on whole numbers even from a fractional start, while
Alt (x0.1) and the 0.1-step fields keep their precision. Typed values and
arrow keys are untouched.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/editor/graph/NodeView.ts

@@ -16,7 +16,7 @@ import type { BehaviorAsset } from '../../core/model/Asset';
 import { findAsset, type Project } from '../../core/model/Project';
 import type { PropertyValue } from '../../core/model/Properties';
 import type { PropertyDef } from '../../core/properties/PropertySchema';
-import { Theme, textStyle, type TextStyleToken, Widget } from '../../ui';
+import { formatNumber, Theme, textStyle, type TextStyleToken, Widget } from '../../ui';
 import { keyLabel } from '../inspector/fieldFactory';
 
 /**
@@ -266,7 +266,9 @@ function formatParam(
 }
 
 function formatValue(value: Value): string {
-  if (typeof value === 'number') return Number.isInteger(value) ? String(value) : value.toFixed(2);
+  // Whole numbers stay bare to keep nodes narrow; fractions get the same precision as the
+  // field that edits them, so a node never rounds harder than the inspector.
+  if (typeof value === 'number') return Number.isInteger(value) ? String(value) : formatNumber(value);
   if (typeof value === 'boolean') return value ? 'true' : 'false';
   return asString(value);
 }