chore: biome auto-format pass (resolve persistent dirty-tree noise)

These files had been showing as modified in every dev session — biome's
canonical formatting (line-length collapses, import sort, type-modifier
placement) didn't match the committed state. No semantic changes.
Committing now so the working tree stays clean across sessions.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/viewer/src/store/use-viewer.d.ts

@@ -1,5 +1,6 @@
 import type { AnyNode, BaseNode, BuildingNode, LevelNode, ZoneNode } from '@pascal-app/core'
 import type { Object3D } from 'three'
+
 type SelectionPath = {
   buildingId: BuildingNode['id'] | null
   levelId: LevelNode['id'] | null