fix: maximize/restore toggles via explicit flag (was stuck due to Figma size clamp)

src/ui.tsx

@@ -26,6 +26,9 @@ function Plugin () {
   const dockedPosRef = useRef<DockPosition | null>(null)
   // Flag: resize pulls the window out of dock (on release, do not re-dock, clear dock state).
   const exitingDockRef = useRef(false)
+  // Explicit toggle state for the Maximize/Restore button (size comparison is unreliable
+  // because Figma clamps the requested size to its real limit when its UI is visible).
+  const maximizedRef = useRef(false)
   const [windowInfo, setWindowInfo] = useState<{
     x: number; y: number; width: number; height: number
     zoom: number
@@ -196,11 +199,11 @@ function Plugin () {
   }, [])
 
   function toggleWindowSize () {
-    const max = windowInfo != null ? windowInfo.maxViewport : { width: 1920, height: 1080 }
-    const isMaximized =
-      currentWindowSize.width >= max.width && currentWindowSize.height >= max.height
-    if (!isMaximized) {
+    if (!maximizedRef.current) {
       // Maximize: stretch to the full available viewport, then pin to center-top.
+      maximizedRef.current = true
+      setIsMaxToggled(true)
+      const max = windowInfo != null ? windowInfo.maxViewport : { width: 1920, height: 1080 }
       setCurrentWindowSize({ ...max })
       emit('RESIZE_WINDOW', { ...max })
       // After Figma applies the resize (and clamps to its real limit), reposition to
@@ -217,6 +220,8 @@ function Plugin () {
       })
     } else {
       // Restore: behave exactly like the Center button (50% viewport, centered).
+      maximizedRef.current = false
+      setIsMaxToggled(false)
       dockWindow('center')
     }
   }
@@ -256,15 +261,10 @@ function Plugin () {
     })
   }
 
-  const max = windowInfo != null ? windowInfo.maxViewport : null
-  // "Maximized" if the window reached (or exceeded) the viewport geometry
-  // (maxViewport = bounds*zoom). Figma clamps the request to its limit, so the real
-  // lastSize may be slightly less than maxViewport — at the ceiling currentWindowSize
-  // will be >= maxViewport and the icon will show "restore".
-  const isMaximized =
-    max != null &&
-    currentWindowSize.width >= max.width &&
-    currentWindowSize.height >= max.height
+  const [isMaxToggled, setIsMaxToggled] = useState(false)
+  // "Maximized" flag drives the icon (expand/collapse). Real size after maximize is
+  // clamped by Figma, so we track it explicitly rather than comparing sizes.
+  const isMaximized = isMaxToggled
 
   return (
     <Fragment>