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/server/src/routes/rooms.ts

@@ -67,6 +67,9 @@ const roomRoutes: FastifyPluginAsync = async (fastify: FastifyInstance) => {
           wallHeight: input.wallHeight ?? 2.7,
           plinthHeight: input.plinthHeight ?? 0.06,
           plinthThickness: input.plinthThickness ?? 0.01,
+          ...(input.stretchCeilingOffset !== undefined && {
+            stretchCeilingOffset: input.stretchCeilingOffset,
+          }),
           order: input.order ?? 0,
           // posX/posY added in schema migration; client regeneration required
           ...(input.posX !== undefined && { posX: input.posX }),
@@ -156,6 +159,9 @@ const roomRoutes: FastifyPluginAsync = async (fastify: FastifyInstance) => {
           ...(input.wallHeight !== undefined && { wallHeight: input.wallHeight }),
           ...(input.plinthHeight !== undefined && { plinthHeight: input.plinthHeight }),
           ...(input.plinthThickness !== undefined && { plinthThickness: input.plinthThickness }),
+          ...(input.stretchCeilingOffset !== undefined && {
+            stretchCeilingOffset: input.stretchCeilingOffset,
+          }),
           ...(input.order !== undefined && { order: input.order }),
           ...(input.posX !== undefined && { posX: input.posX }),
           ...(input.posY !== undefined && { posY: input.posY }),
@@ -237,6 +243,8 @@ const roomRoutes: FastifyPluginAsync = async (fastify: FastifyInstance) => {
             wallHeight: source.wallHeight,
             plinthHeight: source.plinthHeight,
             plinthThickness: source.plinthThickness,
+            stretchCeilingOffset:
+              (((source as Record<string, unknown>).stretchCeilingOffset as number | undefined) ?? 0),
             order: nextOrder,
             posX: source.posX,
             posY: source.posY,
@@ -376,6 +384,7 @@ function toRoomResponse(room: {
   wallHeight: number;
   plinthHeight: number;
   plinthThickness: number;
+  stretchCeilingOffset?: number | null;
   order: number;
   posX?: number | null;
   posY?: number | null;
@@ -394,6 +403,7 @@ function toRoomResponse(room: {
     wallHeight: room.wallHeight,
     plinthHeight: room.plinthHeight,
     plinthThickness: room.plinthThickness,
+    stretchCeilingOffset: room.stretchCeilingOffset ?? 0,
     order: room.order,
     posX: room.posX ?? 0,
     posY: room.posY ?? 0,