feat: editor improvements and collapsible sidebars

Add collapse/expand toggle for the AppShell navigation sidebar and the
editor properties panel (both persisted to localStorage). Bundles other
in-progress editor work including position anchors, outlet sizing, PBR
textures, window slope/frame depth, curtain metadata, and various 2D/3D
rendering tweaks.

apps/server/prisma/schema.prisma

@@ -32,6 +32,9 @@ model Room {
   posY            Float           @default(0)
   floorType       String          @default("CONCRETE")
   wallColor       String          @default("#f5f0eb")
+  wallFinish      String          @default("PAINT")
+  outletWidth     Float           @default(0.07)
+  outletHeight    Float           @default(0.07)
   createdAt       DateTime        @default(now())
   updatedAt       DateTime        @updatedAt
   apartment       Apartment       @relation(fields: [apartmentId], references: [id], onDelete: Cascade)
@@ -39,6 +42,7 @@ model Room {
   openings        WallOpening[]
   electricalItems ElectricalItem[]
   furnitureItems  FurnitureItem[]
+  annotations     Annotation[]
 
   @@index([apartmentId])
 }
@@ -68,6 +72,12 @@ model WallOpening {
   height             Float
   elevationFromFloor Float  @default(0)
   openDirection      String @default("LEFT") // LEFT, RIGHT, INWARD, OUTWARD
+  anchorH            String @default("middle") // left, middle, right (positionAlongWall = center by default)
+  anchorV            String @default("bottom") // top, middle, bottom (elevationFromFloor = bottom edge by default)
+  gridCols           Int    @default(2) // window pane subdivision — columns
+  gridRows           Int    @default(2) // window pane subdivision — rows
+  slopeDepth         Float  @default(0) // window reveal (откос) depth in meters; 0 = no slope shown
+  frameThickness     Float  @default(0.03) // door/window frame member thickness in meters
   room               Room   @relation(fields: [roomId], references: [id], onDelete: Cascade)
   wall               Wall   @relation(fields: [wallId], references: [id], onDelete: Cascade)
 
@@ -84,6 +94,10 @@ model ElectricalItem {
   wallId             String?
   elevationFromFloor Float?
   rotation           Float   @default(0)
+  count              Int     @default(1)
+  anchorH            String  @default("middle") // left, middle, right
+  anchorV            String  @default("middle") // top, middle, bottom
+  label              String? // user-supplied display name; falls back to symbol def label when null
   metadata           String? // JSON
   room               Room    @relation(fields: [roomId], references: [id], onDelete: Cascade)
 
@@ -102,7 +116,28 @@ model FurnitureItem {
   rotation           Float   @default(0)
   elevationFromFloor Float   @default(0)
   label              String?
+  anchorH            String  @default("middle") // left, middle, right
+  anchorV            String  @default("middle") // top, middle, bottom
+  showProjection     Boolean @default(false)
+  opacity            Float   @default(1)
+  metadata           String? // JSON — type-specific extension bag (e.g. curtain open amount + fabric color)
   room               Room    @relation(fields: [roomId], references: [id], onDelete: Cascade)
 
   @@index([roomId])
 }
+
+model Annotation {
+  id              String  @id @default(cuid())
+  roomId          String
+  x               Float   @default(0)
+  y               Float   @default(0)
+  text            String
+  fontSize        Int?
+  color           String?
+  attachedToId    String?
+  projectionOffsetX Float?
+  projectionOffsetY Float?
+  room            Room    @relation(fields: [roomId], references: [id], onDelete: Cascade)
+
+  @@index([roomId])
+}