Address #135 review: ref with the refs, primary button only, reset on ground

lastPress sits with the component's other refs and its thresholds at module
scope with the other tuning constants; only a primary-button (or finger)
press counts, like a native dblclick; a press on empty ground clears the
pending half, so bed → ground → bed within 400 ms is not a double-click.

Co-Authored-By: Claude Fable 5 <[email protected]>

web/src/editor/Canvas.tsx

@@ -35,6 +35,10 @@ import {
 import { useEditorStore, type Viewport } from './store'
 import type { EditorGarden, EditorObject } from './types'
 
+// A double press: same object, this close in time and space.
+const DOUBLE_PRESS_MS = 400
+const DOUBLE_PRESS_PX = 12
+
 const WHEEL_SENSITIVITY = 0.0016
 const ANIM_MS = 520
 const REFIT_THRESHOLD_PX = 60
@@ -95,6 +99,13 @@ export const Canvas = forwardRef<
   const drag = useRef<Drag | null>(null)
   const pinch = useRef<Pinch | null>(null)
   const dropPlant = useRef<{ plant: Plant; lotId: number | null } | null>(null)
+  // The last primary-button press on an object, for double-click detection.
+  // Detected in objDown rather than with onDoubleClick on the object's <g>:
+  // track() captures the pointer on the SVG root, and capture retargets the
+  // compatibility click and dblclick events to the root, so a dblclick
+  // handler on the object never fires — which is why "double-click a bed to
+  // plant it" did nothing from the Organic rebuild until 2026-08-23.
+  const lastPress = useRef<{ id: number; at: number; x: number; y: number } | null>(null)
 
   const vp = useEditorStore((s) => s.vp)
   const anim = useEditorStore((s) => s.anim)
@@ -316,6 +327,7 @@ export const Canvas = forwardRef<
 
   // ── pointer handlers ────────────────────────────────────────────────────
   const onCanvasDown = (e: ReactPointerEvent) => {
+    lastPress.current = null // a press on empty ground is not half of a double-click on a bed
     track(e)
     if (pts.current.size === 2) return pinchStart()
     const st = useEditorStore.getState()
@@ -329,16 +341,6 @@ export const Canvas = forwardRef<
     if (!drag.current) drag.current = { t: 'pan', sx: e.clientX, sy: e.clientY, tx: st.vp.tx, ty: st.vp.ty, moved: false, th: thresh(e) }
   }
 
-  // The last press on an object, for double-click detection. Detected here
-  // rather than with onDoubleClick on the object's <g>: track() captures the
-  // pointer on the SVG root, and capture retargets the compatibility click
-  // and dblclick events to the root, so a dblclick handler on the object
-  // never fires — which is why "double-click a bed to plant it" did nothing
-  // from the Organic rebuild until this was noticed (2026-08-23).
-  const lastPress = useRef<{ id: number; at: number; x: number; y: number } | null>(null)
-  const DOUBLE_PRESS_MS = 400
-  const DOUBLE_PRESS_PX = 12
-
   const objDown = (o: EditorObject) => (e: ReactPointerEvent) => {
     e.stopPropagation()
     track(e)
@@ -354,8 +356,9 @@ export const Canvas = forwardRef<
     if (st.focusId != null && o.id !== st.focusId) return
     const prev = lastPress.current
     const now = performance.now()
-    lastPress.current = { id: o.id, at: now, x: e.clientX, y: e.clientY }
+    // Only the primary button (or a finger) counts, like a native dblclick.
-    if (prev && prev.id === o.id && now - prev.at < DOUBLE_PRESS_MS && Math.hypot(e.clientX - prev.x, e.clientY - prev.y) < DOUBLE_PRESS_PX) {
+    lastPress.current = e.button === 0 && e.isPrimary ? { id: o.id, at: now, x: e.clientX, y: e.clientY } : null
+    if (prev && lastPress.current && prev.id === o.id && now - prev.at < DOUBLE_PRESS_MS && Math.hypot(e.clientX - prev.x, e.clientY - prev.y) < DOUBLE_PRESS_PX) {
       // Second press of a double-click: focus the bed to plant it. No drag
       // starts, so the matching pointerup has nothing to select into Plot.
       lastPress.current = null