ui: replace copy text button with icon button (lucide-style copy/check)

src/ui.tsx

@@ -8,6 +8,7 @@ import {
   IconButton,
   IconExpand24,
   IconCollapse24,
+  IconCheck24,
   useWindowResize
 } from '@create-figma-plugin/ui'
 import { emit, on } from '@create-figma-plugin/utilities'
@@ -166,7 +167,19 @@ function Plugin () {
         <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
           <Muted>{currentWindowSize.width} × {currentWindowSize.height}</Muted>
           <div style={{ display: 'flex', gap: '4px', alignItems: 'center' }}>
-            <Button onClick={copyInfo}>{copied ? '✓ Скопировано' : '📋 Копир.'}</Button>
+            <IconButton
+              title="Копировать значения переменных"
+              onClick={copyInfo}
+            >
+              {copied
+                ? <IconCheck24 />
+                : (
+                  <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg">
+                    <rect x="9" y="9" width="13" height="13" rx="2" ry="2" />
+                    <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1" />
+                  </svg>
+                )}
+            </IconButton>
             <IconButton
               title={isMaximized ? 'Свернуть окно' : 'Развернуть окно'}
               onClick={toggleWindowSize}