feat: persist maximize state so Restore button shows after reopen

src/main.ts

@@ -42,7 +42,7 @@ export default function () {
   const PLACEMENT_KEY = 'figma-ai-plugin:placement'
   type Placement =
     | { mode: 'dock'; position: DockPosition }
-    | { mode: 'free'; x: number; y: number; w: number; h: number }
+    | { mode: 'free'; x: number; y: number; w: number; h: number; maximized?: boolean }
   let saveTimer: ReturnType<typeof setTimeout> | null = null
   function savePlacement (p: Placement) {
     try {
@@ -56,7 +56,7 @@ export default function () {
   // Persist the CURRENT window as a free placement (real canvas-space x/y + size).
   // Used by maximize and corner docks, which must remember the EXACT size/position
   // rather than re-deriving it from a dock formula (which would reset the size).
-  function saveFreeFromCurrent () {
+  function saveFreeFromCurrent (maximized?: boolean) {
     try {
       const pos = (figma.ui as any).getPosition()
       savePlacement({
@@ -64,7 +64,8 @@ export default function () {
         x: Math.round(pos.canvasSpace.x),
         y: Math.round(pos.canvasSpace.y),
         w: lastSize.width,
-        h: lastSize.height
+        h: lastSize.height,
+        maximized: maximized === true
       })
     } catch (e) { /* getPosition unavailable — skip */ }
   }
@@ -379,10 +380,10 @@ export default function () {
 
   // UI asks to persist the CURRENT window as a free placement (used by Maximize,
   // which is not a held dock — it must remember the exact size+position across restart).
-  on('SAVE_FREE', function () {
+  on('SAVE_FREE', function (payload?: { maximized?: boolean }) {
     dockedPosition = null // maximize is not held; clear any stale dock state
     lastBoundsKey = ''
-    saveFreeFromCurrent()
+    saveFreeFromCurrent(payload != null ? payload.maximized === true : false)
   })
 
   // Останавливаем поллинг при закрытии плагина, чтобы не висел в памяти.
@@ -514,6 +515,10 @@ export default function () {
         figma.ui.resize(saved.w, saved.h)
         figma.ui.reposition(saved.x, saved.y)
         lastSize = { width: saved.w, height: saved.h }
+        // If it was maximized, tell UI to show the Restore button on next open.
+        if (saved.maximized === true) {
+          emit('SET_MAXIMIZED', { maximized: true })
+        }
       }
     })
   } catch (e) { /* storage unavailable → default center below */ }

src/ui.tsx

@@ -167,6 +167,17 @@ function Plugin () {
     return function () { off() }
   }, [])
 
+  // Main tells UI the restored placement was maximized → show the Restore button.
+  useEffect(function () {
+    const off = on('SET_MAXIMIZED', function (payload: { maximized: boolean }) {
+      if (payload.maximized) {
+        maximizedRef.current = true
+        setIsMaxToggled(true)
+      }
+    })
+    return function () { off() }
+  }, [])
+
   // Request fresh window data from main (after any action / on start).
   // Pass the REAL iframe size (window.innerWidth/innerHeight) — what Figma actually
   // rendered, not the requested lastSize. Otherwise gaps would be tautological.
@@ -217,7 +228,8 @@ function Plugin () {
           })
           // Maximize is NOT a held dock — persist the exact size+position so re-open
           // restores it (overrides the edge-dock save done by DOCK_REFINE above).
-          emit('SAVE_FREE')
+          // 'maximized: true' so the Restore button shows on next open.
+          emit('SAVE_FREE', { maximized: true })
           refreshInfo()
         })
       })