Refactor node image upload and preview (#2580)

Co-authored-by: huchenlei <huchenlei@proton.me>

src/utils/imageUtil.ts

@@ -0,0 +1,12 @@
+export const is_all_same_aspect_ratio = (imgs: HTMLImageElement[]): boolean => {
+  if (!imgs.length || imgs.length === 1) return true
+
+  const ratio = imgs[0].naturalWidth / imgs[0].naturalHeight
+
+  for (let i = 1; i < imgs.length; i++) {
+    const this_ratio = imgs[i].naturalWidth / imgs[i].naturalHeight
+    if (ratio != this_ratio) return false
+  }
+
+  return true
+}