From 2ecae465415c38d99ed3baf9c6a81e189bb6a8b7 Mon Sep 17 00:00:00 2001
From: Wassim SAMAD <wass08@gmail.com>
Date: Wed, 26 Aug 2026 09:33:51 -0400
Subject: [PATCH] Level pill: no ground-floor delete; hide compass in studio
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The floating level selector's kebab offered Delete for the ordinal-0
ground floor — the vertical model's zero anchor — while the site panel
and command palette already guard it; disable it with the same rule and
explanatory title. The floorplan compass portaled into the viewer area
outlived the studio stage overlays (gallery, materials, item builder);
gate it on the edit workspace like the rest of the editor chrome.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SrRkPvd6AogVAbt3PNeLAw
---
 packages/editor/src/components/editor/floorplan-panel.tsx  | 6 +++++-
 .../editor/src/components/ui/floating-level-selector.tsx   | 7 ++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/editor/src/components/editor/floorplan-panel.tsx b/packages/editor/src/components/editor/floorplan-panel.tsx
index 2fef770bc..98a473458 100644
--- a/packages/editor/src/components/editor/floorplan-panel.tsx
+++ b/packages/editor/src/components/editor/floorplan-panel.tsx
@@ -5092,6 +5092,9 @@ export function FloorplanPanel({
     if (building?.type !== 'building') return false
     return building.children.some((cid) => state.nodes[cid]?.type === 'level')
   })
+  // The studio workspace (renders / materials / item builder) is a clean
+  // stage — editor viewport chrome, compass included, stays out of it.
+  const isStudioWorkspace = useEditor((s) => s.workspaceMode === 'studio')
   const elevators = useScene(
     useShallow((state) => {
       const building = currentBuildingId ? state.nodes[currentBuildingId] : null
@@ -11136,7 +11139,8 @@ export function FloorplanPanel({
         <FloorplanRegistryActionMenu />
         <FloorplanGroupActionMenu />
 
-        {(levelNode?.type === 'level' || hasAmbientBuildingLevel) &&
+        {!isStudioWorkspace &&
+          (levelNode?.type === 'level' || hasAmbientBuildingLevel) &&
           (compassHost ? (
             createPortal(
               <FloorplanCompassButton
diff --git a/packages/editor/src/components/ui/floating-level-selector.tsx b/packages/editor/src/components/ui/floating-level-selector.tsx
index dc12e538b..2a2390806 100644
--- a/packages/editor/src/components/ui/floating-level-selector.tsx
+++ b/packages/editor/src/components/ui/floating-level-selector.tsx
@@ -150,6 +150,9 @@ function LevelRow({
   const storeyHeight = getStoredLevelHeight(level)
   // toFixed(2) + strip one trailing zero: "2.50" → "2.5", "2.75" stays.
   const storeyHeightLabel = `${toDisplay(storeyHeight).toFixed(2).replace(/0$/, '')} ${displayUnit}`
+  // Same rule as the site panel and command palette: the ordinal-0 ground
+  // floor is the vertical model's zero anchor and must never be deletable.
+  const canDeleteLevel = level.level !== 0
 
   // Clean preset values per display system; imperial stores exact meters
   // for whole-foot storey heights.
@@ -304,11 +307,13 @@ function LevelRow({
                 </button>
               )}
               <button
-                className="flex w-full items-center gap-2 rounded-md px-2.5 py-1.5 text-left text-muted-foreground text-xs transition-colors hover:bg-white/10 hover:text-red-400"
+                className="flex w-full items-center gap-2 rounded-md px-2.5 py-1.5 text-left text-muted-foreground text-xs transition-colors enabled:hover:bg-white/10 enabled:hover:text-red-400 disabled:cursor-not-allowed disabled:opacity-50"
+                disabled={!canDeleteLevel}
                 onClick={(e) => {
                   e.stopPropagation()
                   onRequestDelete()
                 }}
+                title={canDeleteLevel ? 'Delete level' : 'The ground level cannot be deleted'}
                 type="button"
               >
                 <Trash2 className="h-3 w-3" />