在App.vue中优化加载动画逻辑，移除不必要的延迟

src/@core/utils/image.ts

@@ -2,8 +2,7 @@ import ColorThief from 'colorthief'
 
 // 将 RGB 转换为十六进制
 function rgbStringToHex(rgbArray: number[]): string {
-  if (rgbArray.length !== 3 || rgbArray.some(isNaN))
-    throw new Error('Invalid RGB string format')
+  if (rgbArray.length !== 3 || rgbArray.some(isNaN)) throw new Error('Invalid RGB string format')
 
   const [r, g, b] = rgbArray
 
@@ -21,3 +20,27 @@ export async function getDominantColor(image: HTMLImageElement): Promise<string>
   const dominantColor = colorThief.getColor(image)
   return rgbStringToHex(dominantColor)
 }
+
+// 预加载图片
+export async function preloadImage(url: string): Promise<boolean> {
+  return new Promise(resolve => {
+    const img = new Image()
+
+    img.onload = () => resolve(true)
+    img.onerror = () => resolve(false)
+
+    // 设置超时，防止图片长时间加载
+    const timeout = setTimeout(() => {
+      img.src = ''
+      resolve(false)
+    }, 5000) // 5秒超时
+
+    img.src = url
+
+    // 如果图片已经缓存，onload可能不会触发
+    if (img.complete) {
+      clearTimeout(timeout)
+      resolve(true)
+    }
+  })
+}