feat: add outlet direction (horizontal/vertical), wall light styles, floor textures, and stretch ceiling

- Add configurable outlet direction (horizontal/vertical) stored in metadata
- Add wall light style variants (classic, pendant-globe, sconce-up, sconce-down)
- Add PBR floor textures including natural oak
- Add stretch ceiling offset support with DB migration
- Add furniture surface texture selection
- Add canvas theme colors utility for dark mode support
- Update projection views with improved rendering
- Add EN and RU translations for all new properties

apps/client/src/components/editor/context/EditorContext.tsx

@@ -73,7 +73,7 @@ function createInitialState(room: RoomFull): EditorState {
     gridVisible: true,
     snapEnabled: true,
     snapGranularity: DEFAULT_GRID_SIZE,
-    layerVisibility: { walls: true, electrical: true, furniture: true, measurements: true, annotations: true },
+    layerVisibility: { walls: true, electrical: true, furniture: true, measurements: true, annotations: true, stretchCeiling: true },
     selectedElectricalIndex: null,
     selectedFurnitureIndex: null,
     annotations: room.annotations ?? [],