feat(pixel-office): show temp-worker stools on seat and randomize subagent seating

lib/pixel-office/engine/officeState.ts

@@ -706,12 +706,13 @@ export class OfficeState {
       Math.abs(c - parentCol) + Math.abs(r - parentRow)
 
     let bestSeatId: string | null = null
-    for (const seatId of SUBAGENT_PRIORITY_SEAT_IDS) {
+    const availablePrioritySeats = SUBAGENT_PRIORITY_SEAT_IDS.filter((seatId) => {
       const seat = this.seats.get(seatId)
-      if (seat && !seat.assigned) {
-        bestSeatId = seatId
-        break
-      }
+      return !!seat && !seat.assigned
+    })
+    if (availablePrioritySeats.length > 0) {
+      const randomIdx = Math.floor(Math.random() * availablePrioritySeats.length)
+      bestSeatId = availablePrioritySeats[randomIdx]
     }
     if (!bestSeatId) {
       let bestDist = Infinity

lib/pixel-office/engine/renderer.ts

@@ -236,6 +236,13 @@ export function renderScene(
   const laptopUpwardSpinRad = -Math.PI / 12
   const laptopTiltScaleY = Math.max(0.22, Math.abs(Math.cos(laptopXTiltRad)))
   const laptopTiltSkewX = -Math.sin(laptopXTiltRad) * 0.35
+  const visibleSubagentStoolIds = new Set<string>()
+  for (const ch of characters) {
+    if (!ch.isSubagent || ch.state !== CharacterState.TYPE || !ch.seatId) continue
+    if (!ch.seatId.startsWith('stool-r')) continue
+    if (ch.matrixEffect === 'despawn') continue
+    visibleSubagentStoolIds.add(ch.seatId)
+  }
 
   // Wall decorations as z-sorted drawables (zY just above row 0 walls so they render on top of walls but below characters)
   const wallDecoZY = TILE_SIZE + 0.5
@@ -252,6 +259,9 @@ export function renderScene(
 
   // Furniture
   for (const f of furniture) {
+    if (f.uid?.startsWith('stool-r') && !visibleSubagentStoolIds.has(f.uid)) {
+      continue
+    }
     const fx = offsetX + f.x * zoom
     const fy = offsetY + f.y * zoom
     if (f.emoji) {

lib/pixel-office/layout/layoutSerializer.ts

@@ -73,7 +73,16 @@ export function layoutToFurnitureInstances(furniture: PlacedFurniture[]): Furnit
       sprite = getColorizedSprite(`furn-${item.type}-${h}-${s}-${bv}-${cv}-${item.color.colorize ? 1 : 0}`, entry.sprite, item.color)
     }
 
-    instances.push({ sprite, x, y, zY, ...(entry.emoji ? { emoji: entry.emoji } : {}), ...(item.rotation ? { rotation: item.rotation } : {}), ...(entry.emojiScale ? { emojiScale: entry.emojiScale } : {}) })
+    instances.push({
+      uid: item.uid,
+      sprite,
+      x,
+      y,
+      zY,
+      ...(entry.emoji ? { emoji: entry.emoji } : {}),
+      ...(item.rotation ? { rotation: item.rotation } : {}),
+      ...(entry.emojiScale ? { emojiScale: entry.emojiScale } : {}),
+    })
   }
   return instances
 }

lib/pixel-office/types.ts

@@ -64,6 +64,7 @@ export interface Seat {
 }
 
 export interface FurnitureInstance {
+  uid?: string
   sprite: SpriteData
   /** Pixel x (top-left) */
   x: number