chore: refactor countdown logic and update utils4u auto imports

vite.config.plugins.ts

@@ -77,7 +77,16 @@ export function Plugins() {
         '@vueuse/core',
         VueRouterAutoImports,
         unheadVueComposablesImports,
-        createUtils4uAutoImports(['primevue']),
+        Object.assign(
+          createUtils4uAutoImports([
+            'primevue', // 参考重写 utils4u 的 createUtils4uAutoImports 的逻辑 https://github.com/unplugin/unplugin-auto-import/blob/main/src/presets/vueuse-core.ts
+          ]),
+          {
+            'utils4u/vue-use': createUtils4uAutoImports(['primevue'])['utils4u/vue-use'].filter(
+              (item) => !['useCountdown'].includes(item.toString()), // FIXME: Duplicated imports "useCountdown", the one from "@vueuse/core" has been ignored and "utils4u/vue-use" is used
+            ),
+          },
+        ),
         {
           // add any other imports you were relying on
           'vue-router/auto': ['useLink'],