feat(编辑能力): 新增擦除工具，优化字体裁剪与资源清理

assets/webui/index.html

@@ -91,6 +91,11 @@
 				</select>
 				<span>对象</span>
 			</div>
+			<div class="editor-group editor-erase">
+				<button id="eraseObjectButton" class="button" type="button" title="整对象擦除" aria-label="整对象擦除" aria-pressed="false">对象</button>
+				<button id="eraseRegionButton" class="button" type="button" title="区域擦除（视觉裁剪）" aria-label="区域擦除" aria-pressed="false">区域</button>
+				<span>擦除</span>
+			</div>
 			<div class="editor-group">
 				<button id="insertTextButton" class="button" type="button" aria-label="添加文字" aria-pressed="false">文字</button>
 				<button id="insertImageButton" class="button" type="button" aria-label="添加图片">图片</button>