multi profile (#4532)

* multi-profile work

* another test

* clean up

* cover a quirk with a test

* last of tests

* fix typos

* Fix source range in snap test

---------

Co-authored-by: Jonathan Tran <jonnytran@gmail.com>

src/clientSideScene/segments.ts

@@ -691,19 +691,21 @@ export function createProfileStartHandle({
   scale = 1,
   theme,
   isSelected,
+  size = 12,
   ...rest
 }: {
   from: Coords2d
   scale?: number
   theme: Themes
   isSelected?: boolean
+  size?: number
 } & (
   | { isDraft: true }
   | { isDraft: false; id: string; pathToNode: PathToNode }
 )) {
   const group = new Group()
 
-  const geometry = new BoxGeometry(12, 12, 12) // in pixels scaled later
+  const geometry = new BoxGeometry(size, size, size) // in pixels scaled later
   const baseColor = getThemeColorForThreeJs(theme)
   const color = isSelected ? 0x0000ff : baseColor
   const body = new MeshBasicMaterial({ color })