Refactoring round 5 covers the code since round 4 without changing behaviour: four identical copies of dot() and three of "nearest point on a segment" stood in the collision math, in the hit area of the collider outlines and in the polygon handles, so they moved into the new module src/core/util/vec.ts; the warning line, the busy state, info() and the caret reset were written out line by line in both the sign-in screen and the password dialog and are now FormStatus; the closing row "Cancel plus a confirming button, optionally one on the left" was built by hand in FormDialog, FilePicker, OpenProjectDialog and PasswordDialog and is now dialogButtons(); the header bar was drawn by the toolbar, the TabHeader and the Breadcrumb each on its own and is now drawHeaderBar(); AddColliderCommand and AddRigidbodyCommand share a base, each subclass only builds its own asset; Editor.ts derives the panes from assetEditors instead of repeating eight entries and clamps its splitters with clamp(); jscpd over src falls from 0.19 % to 0.14 %; dead code is gone - listScenes() has been orphaned since the Scene picker fell away (#183), DEFAULT_FILTER (#152) was never used, the two test hooks projectPickerRowAt/rowPosition and particleCompiles are read by no tool, and four functions lost an export they did not need; seven comments that told history ("used to", "no longer", "since #...") describe the state of things now, and that this changed nothing was proved by a rebuild - the bundle is md5 identical, b4ad0dfe... before and after; the README said Logout sits at the far right of the toolbar, which has been the Account menu since #182, and wiki/Architecture.md was missing src/core/util/ altogether; 4 new unit tests cover vec.ts, and switching the clamp on the segment off makes exactly one of them fail while none of the 76 neighbouring tests notice, so that clamping was covered nowhere before (#85)

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

src/editor/ProjectSettingsDialog.ts

@@ -39,8 +39,8 @@ const PLAY_FROM_LABEL: Record<PlayFrom, string> = {
 
 /**
  * Everything about the project that is not an asset (#183): its name, which scene Play starts, and
- * the collision layers (#152). The three used to sit in the top bar and in a menu entry of their
- * own; the bar carries icons now, so this is the one place they are edited.
+ * the collision layers (#152). The top bar carries icons only, so this is the one place the three
+ * are edited.
  *
  * Colliders name a layer by its *number*, so a layer taken out of the middle would silently move
  * every collider below it onto another one; only the last layer can be removed, and the list is