fix: add visible drag-handle icon (3x3 dots) in bottom-right corner

- ui.tsx: decorative SVG drag indicator (pointerEvents:none) like old plugin
- uses --figma-color-icon-secondary + opacity 0.4, fixed bottom/right 3px
- Fragment wrapper; real drag still handled by useWindowResize handle

src/ui.tsx

@@ -10,7 +10,7 @@ import {
   useWindowResize
 } from '@create-figma-plugin/ui'
 import { emit } from '@create-figma-plugin/utilities'
-import { h } from 'preact'
+import { h, Fragment } from 'preact'
 import { useState } from 'preact/hooks'
 
 const MIN_WINDOW_SIZE = { width: 320, height: 200 }
@@ -39,33 +39,57 @@ function Plugin () {
     currentWindowSize.height >= MAX_WINDOW_SIZE.height
 
   return (
-    <Container space="medium" style={{ height: '100%', display: 'flex', flexDirection: 'column' }}>
-      <div style={{ display: 'flex', justifyContent: 'flex-end' }}>
-        <IconButton
-          title={isMaximized ? 'Свернуть окно' : 'Развернуть окно'}
-          onClick={toggleWindowSize}
+    <Fragment>
+      <Container space="medium" style={{ height: '100%', display: 'flex', flexDirection: 'column' }}>
+        <div style={{ display: 'flex', justifyContent: 'flex-end' }}>
+          <IconButton
+            title={isMaximized ? 'Свернуть окно' : 'Развернуть окно'}
+            onClick={toggleWindowSize}
+          >
+            {isMaximized ? <IconCollapse24 /> : <IconExpand24 />}
+          </IconButton>
+        </div>
+        <div
+          style={{
+            flex: 1,
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            flexDirection: 'column'
+          }}
         >
-          {isMaximized ? <IconCollapse24 /> : <IconExpand24 />}
-        </IconButton>
-      </div>
+          <Text style={{ fontSize: '13px', fontWeight: 600 }}>Hello, Figma ✦</Text>
+          <VerticalSpace space="small" />
+          <Muted>AI assistant (MVP) — bootstrap</Muted>
+          <VerticalSpace space="small" />
+          <Muted>
+            {currentWindowSize.width} × {currentWindowSize.height}
+          </Muted>
+        </div>
+      </Container>
+      {/* Декоративная иконка drag-хендла в правом нижнем углу (как в старом плагине).
+          pointerEvents:none — сам drag ловит невидимый div от useWindowResize. */}
       <div
         style={{
-          flex: 1,
-          display: 'flex',
-          alignItems: 'center',
-          justifyContent: 'center',
-          flexDirection: 'column'
+          position: 'fixed',
+          bottom: 3,
+          right: 3,
+          zIndex: 2,
+          color: 'var(--figma-color-icon-secondary)',
+          opacity: 0.4,
+          pointerEvents: 'none'
         }}
+        aria-hidden="true"
       >
-        <Text style={{ fontSize: '13px', fontWeight: 600 }}>Hello, Figma ✦</Text>
-        <VerticalSpace space="small" />
-        <Muted>AI assistant (MVP) — bootstrap</Muted>
-        <VerticalSpace space="small" />
-        <Muted>
-          {currentWindowSize.width} × {currentWindowSize.height}
-        </Muted>
+        <svg width="12" height="12" viewBox="0 0 12 12" fill="none" xmlns="http://www.w3.org/2000/svg">
+          <path d="M2 9C2.55228 9 3 9.44772 3 10C3 10.5523 2.55228 11 2 11C1.44772 11 1 10.5523 1 10C1 9.44772 1.44772 9 2 9Z" fill="currentColor" />
+          <path d="M6 9C6.55228 9 7 9.44772 7 10C7 10.5523 6.55228 11 6 11C5.44772 11 5 10.5523 5 10C5 9.44772 5.44772 9 6 9Z" fill="currentColor" />
+          <path d="M6 5C6.55228 5 7 5.44772 7 6C7 6.55228 6.55228 7 6 7C5.44772 7 5 6.55228 5 6C5 5.44772 5.44772 5 6 5Z" fill="currentColor" />
+          <path d="M10 5C10.5523 5 11 5.44772 11 6C11 6.55228 10.5523 7 10 7C9.44772 7 9 6.55228 9 6C9 5.44772 9.44772 5 10 5Z" fill="currentColor" />
+          <path d="M10 1C10.5523 1 11 1.44772 11 2C11 2.55228 10.5523 3 10 3C9.44772 3 9 2.55228 9 2C9 1.44772 9.44772 1 10 1Z" fill="currentColor" />
+        </svg>
       </div>
-    </Container>
+    </Fragment>
   )
 }