feat(wysiwyg): 레이어/속성 패널 및 Export(절대배치) 1차 TDD/구현

- LayersPanel: 순서 변경/잠금/숨김 토글
- PropsPanel: 위치/크기/회전 및 이미지 src/alt 편집
- exportFrame: frame-scale 토큰 및 오브젝트 절대배치 HTML/CSS 출력
- 테스트 추가 및 전체 그린 유지

components/wysiwyg/LayersPanel.tsx

@@ -0,0 +1,65 @@
+import React, { useCallback, useState } from 'react'
+import type { Frame } from '@/lib/wysiwyg/schema'
+
+export type LayersPanelProps = {
+  frame: Frame
+  onChange?: (next: Frame) => void
+}
+
+export function LayersPanel({ frame, onChange }: LayersPanelProps) {
+  const [model, setModel] = useState<Frame>(frame)
+
+  const move = useCallback((id: string, dir: 1 | -1) => {
+    const idx = model.layers.findIndex((l) => l.id === id)
+    if (idx < 0) return
+    const j = idx + dir
+    if (j < 0 || j >= model.layers.length) return
+    const nextLayers = model.layers.slice()
+    const [it] = nextLayers.splice(idx, 1)
+    nextLayers.splice(j, 0, it)
+    const next = { ...model, layers: nextLayers }
+    setModel(next)
+    onChange?.(next)
+  }, [model, onChange])
+
+  const toggle = useCallback((id: string, key: 'locked' | 'visible') => {
+    const nextLayers = model.layers.map((l) => l.id === id ? { ...l, [key]: key === 'visible' ? !l.visible : !l.locked } : l)
+    const next = { ...model, layers: nextLayers }
+    setModel(next)
+    onChange?.(next)
+  }, [model, onChange])
+
+  return (
+    <div aria-label="Layers Panel">
+      {model.layers.map((l) => (
+        <div key={l.id} data-testid="layer-item" style={{ display: 'flex', gap: 8, alignItems: 'center' }}>
+          <span>{l.name}</span>
+          <button type="button" data-testid={`layer-up-${l.id}`} onClick={() => move(l.id, -1)} aria-label={`move up ${l.name}`}>
+            ↑
+          </button>
+          <button type="button" data-testid={`layer-down-${l.id}`} onClick={() => move(l.id, 1)} aria-label={`move down ${l.name}`}>
+            ↓
+          </button>
+          <button
+            type="button"
+            data-testid={`layer-lock-${l.id}`}
+            aria-pressed={l.locked ? 'true' : 'false'}
+            onClick={() => toggle(l.id, 'locked')}
+            aria-label={`lock ${l.name}`}
+          >
+            🔒
+          </button>
+          <button
+            type="button"
+            data-testid={`layer-hide-${l.id}`}
+            aria-pressed={l.visible ? 'false' : 'true'}
+            onClick={() => toggle(l.id, 'visible')}
+            aria-label={`toggle ${l.name} visibility`}
+          >
+            👁
+          </button>
+        </div>
+      ))}
+    </div>
+  )
+}