fix: fix incorrect animation start position on mobile theme toggle

- Unified coordinate handling for mouse and touch events to ensure the
animation start point accurately follows the finger position on mobile
devices.

frontend_nuxt/utils/theme.js

@@ -28,7 +28,9 @@ function apply(mode) {
   // 更新 meta 标签
   const androidMeta = document.querySelector('meta[name="theme-color"]')
   const iosMeta = document.querySelector('meta[name="apple-mobile-web-app-status-bar-style"]')
-  const themeColor = getComputedStyle(document.documentElement).getPropertyValue('--background-color').trim();
+  const themeColor = getComputedStyle(document.documentElement)
+    .getPropertyValue('--background-color')
+    .trim()
   const themeStatus = newMode === 'dark' ? 'black-translucent' : 'default'
 
   if (androidMeta) {
@@ -69,8 +71,19 @@ export function setTheme(mode) {
 
 function getCircle(event) {
   if (!import.meta.client) return undefined
-  const x = event.clientX
-  const y = event.clientY
+
+  let x, y
+  if (event.touches?.length) {
+    x = event.touches[0].clientX
+    y = event.touches[0].clientY
+  } else if (event.changedTouches?.length) {
+    x = event.changedTouches[0].clientX
+    y = event.changedTouches[0].clientY
+  } else {
+    x = event.clientX
+    y = event.clientY
+  }
+
   return {
     x,
     y,