Phase 13: Rooms + Auto-roof + Beauty + Dirtiness + Cleaning

Three-agent fan-out — Opus pre-wrote Room class, World.rooms/room_at_tile/is_indoor,
4 EventBus signals before dispatch so the slices ran fully parallel.

DECISION: Big-room UX = bump auto-roof cap to 16, banner above. Cabin
(24 tiles) intentionally exceeds cap to exercise the warning path; a
5×5 test shed (9 interior tiles) was added to exercise the roof path.

Room detection (Agent A):
- scenes/world/room.gd — class_name Room, tiles/bounds/is_under_roof,
  contains_tile() bounds-then-list-checked, recompute_bounds()
- scenes/world/room_detector.gd — class_name RoomDetector, BFS 4-dir
  from floor/door tiles, walls/terrain as boundary, doors counted as
  room interior. Detects up to 4× cap; auto-roofs only ≤16.
- World.mark_wall_tile/mark_floor_tile/mark_door_tile hook BFS recompute
- Door._complete() now erases wall-layer stamp + registers door tile
- Designation.TOOL_NO_ROOF paint mode wired (UI button deferred Phase 17)
- EventBus.room_changed / room_too_large signals

Indoor/Shelter (Agent B):
- Pawn._is_sheltered() rerouted: World.is_indoor() first, floor-proxy fallback
- IndoorTintOverlay Node2D — _draw fills roofed-room tiles at α=0.10 warm
- Crop._on_sim_tick skips stage advance when World.is_indoor(tile)

Beauty + Dirtiness + Cleaning + Room thoughts (Agent C):
- BeautySystem sparse map, linear falloff radius=3, Quality multiplier
  (SHODDY 0.5 → LEGENDARY 2.5). Base: Bed +2, Workbench +1, Torch +3, Hearth +4
- DirtinessSystem 0-100, tier crossings (clean<25/dirty<60/filthy≥60)
  emit tile_dirtiness_changed. bump/bump_clean/bump_pawn_traffic API
- CleaningProvider priority=2, KIND_CLEAN toil, 2.5 dirt/tick for ~40 ticks
- Bed/Torch/Workbench _complete() now register with BeautySystem
- 7 room mood thoughts: clean_room (+2), dirty_room (-3), filthy_room (-6),
  beautiful_room (+4), ugly_room (-3), slept_in_room (+3 EVENT, wires Ph 17),
  ate_without_table (-3 EVENT, wires Ph 17)
- Pawn._sync_room_thoughts called from _process_thoughts after cold block,
  defensive against null rooms/systems

Integration recovery (Opus):
- Agent C's BeautySystem/DirtinessSystem/CleaningProvider/IndoorTintOverlay
  instantiation in world.gd never landed (only field declarations + entity
  hooks survived). Added preloads + runtime add_child + autoload bindings +
  CleaningProvider registration + furniture pre-seed in _ready
- Added _prestamp_test_shed_for_room_detector with _spawn_complete_wall/floor
  helpers so a 5×5 visible shed exercises the auto-roof path at boot

MCP runtime verified:
- Rooms: cabin Room#2 size=24 roofed=false (room_too_large fires),
  shed Room#3 size=9 roofed=true (auto-roof active)
- beauty_map size=50 around prebuilt furniture; bed at (47,24) beauty=4.0
- Bram teleported to (36, 25) in shed → indoor=true, sheltered=true,
  thoughts=[clean_room +2], mood=52.0
- Screenshot: shed walls + brown floor visible; cabin warmly torch-lit;
  Spring 1/12 indicator; Day 1 07:52

Delegation: 3× gdscript-refactor (Sonnet) agents in parallel;
integration recovery + MCP verify on Opus.

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

scenes/world/indoor_tint_overlay.gd

@@ -0,0 +1,52 @@
+extends Node2D
+## Phase 13 — subtle warm overlay drawn over every tile that belongs to an
+## enclosed, roofed Room.
+##
+## Rendering model: Node2D _draw() filled on EventBus.room_changed only — NOT
+## every render frame.  At MVP scale (< 20 rooms × ~10 tiles each) that's at
+## most ~200 draw_rect calls per room-topology change, which is negligible.
+##
+## Placement: child of the World Node2D, z_index = 3 (above Floor layer at 1,
+## same z as Designation — kept above floor, below pawns/entities at 4+).
+##
+## The overlay does NOT use CanvasModulate or shaders; a plain translucent rect
+## per tile is correct, cheap, and doesn't interact with the day/night modulate.
+##
+## When the room registry is empty (boot, before RoomDetector fires), _draw()
+## simply does nothing — graceful degradation.
+
+class_name IndoorTintOverlay
+
+## Warm candlelight tint.  Alpha is deliberately very low (0.10) so the floor
+## and entity sprites beneath remain fully legible.
+const INDOOR_COLOR: Color = Color(1.0, 0.95, 0.85, 0.10)
+
+const TILE_SIZE_PX: int = 16  ## Mirror of World.TILE_SIZE_PX; standalone to avoid circular dep.
+
+
+func _ready() -> void:
+	z_index = 3
+	# Listen for room topology changes and redraw.  room_changed fires when any
+	# Room is created, destroyed, or recomputed by RoomDetector (Agent A).
+	EventBus.room_changed.connect(_on_room_changed)
+
+
+func _on_room_changed(_room_id: int) -> void:
+	queue_redraw()
+
+
+func _draw() -> void:
+	# Iterate every room in the registry.  Only draw tiles belonging to roofed rooms.
+	for id in World.rooms:
+		var r = World.rooms[id]
+		if not r.is_under_roof:
+			continue
+		# r.tiles is an Array[Vector2i] per room.gd contract.
+		for t in r.tiles:
+			var rect := Rect2(
+				float(t.x * TILE_SIZE_PX),
+				float(t.y * TILE_SIZE_PX),
+				float(TILE_SIZE_PX),
+				float(TILE_SIZE_PX)
+			)
+			draw_rect(rect, INDOOR_COLOR)