Chairs have no rotation controls (rotatable flag on configs)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

CLAUDE.md

@@ -15,7 +15,7 @@ Layout and editing UI. No optimizer yet.
 
 **Editing (Phase 2)**
 - Click an item to select it (blue outline); click empty floor to deselect (Escape/Done too). Dragging still moves. Selecting opens the item panel in the sidebar (replaces tiles / type menu).
-- Item panel: Rotate 90 button + free angle wheel (0-359, wraps); Lock/Unlock; Delete (also Delete/Backspace key, ignored while typing in an input); "Seats at this table" wheel for tables (per-item override, "Reset to default" link when overridden); Size wheels (0.3-6 m, 0.1 steps; screens show only Length).
+- Item panel (chairs have no rotation controls; every other type does): Rotate 90 button + free angle wheel (0-359, wraps); Lock/Unlock; Delete (also Delete/Backspace key, ignored while typing in an input); "Seats at this table" wheel for tables (per-item override, "Reset to default" link when overridden); Size wheels (0.3-6 m, 0.1 steps; screens show only Length).
 - Rotation turns around the item's center and collision/wall clamping use the rotated bounding box (`boundsOf`). A rotate/size change is pushed back inside the walls, then rejected if it would overlap (`tryUpdate`).
 - Locked items can't be dragged or rotated and show a padlock. (Size, seats and delete are still allowed on locked items.)
 - Delete frees inventory automatically (remaining is derived from `items`).
@@ -54,6 +54,7 @@ interface FurnitureTypeConfig {
   id: FurnitureType; name: string; shape: Shape;
   defaultWidth: number; defaultHeight: number; // meters
   isTable: boolean;
+  rotatable: boolean;    // chairs: false (no rotation controls)
   available: number;     // inventory count
   seatsPerUnit?: number; // type-level seats
 }