fix: 修复编辑器图片预览组件的坐标偏移并处理加载测量

src/lib/editor/imagePreviewPlugin.ts

@@ -12,26 +12,35 @@ class ImagePreviewWidget extends WidgetType {
 		return this.url === other.url;
 	}
 
-	toDOM() {
+	toDOM(view: EditorView) {
 		const wrap = document.createElement('div');
 		wrap.className = 'cm-image-preview-wrapper';
 		wrap.style.userSelect = 'none';
 		wrap.contentEditable = 'false';
+		// 块级预览的间距必须计入自身高度，避免外边距折叠导致点击坐标偏移。
+		wrap.style.padding = '8px 0';
 
 		const img = document.createElement('img');
+		img.onload = img.onerror = () => view.requestMeasure();
 		img.src = this.url;
 		img.className = 'cm-image-preview';
 		img.style.maxWidth = '100%';
 		img.style.maxHeight = '400px';
 		img.style.objectFit = 'contain';
 		img.style.display = 'block';
-		img.style.marginTop = '8px';
-		img.style.marginBottom = '8px';
+		img.style.margin = '0';
 		img.style.border = '1px solid #e5e7eb';
 
 		wrap.appendChild(img);
 		return wrap;
 	}
+
+	destroy(dom: HTMLElement) {
+		const img = dom.querySelector('img');
+		if (img) {
+			img.onload = img.onerror = null;
+		}
+	}
 }
 
 function getImageDecorationsForState(state: EditorState) {