Squashed commit of the following:

commit 38d10d7151
Author: R2m1liA <15258427350@163.com>
Date:   Sat Jul 19 11:34:11 2025 +0800

    Feature: 添加俄语、西班牙语支持 & 添加单位国际化

commit 25d4dc7a7f
Author: R2m1liA <15258427350@163.com>
Date:   Fri Jul 18 11:42:21 2025 +0800

    Fix: 修正导航栏动画 & 移除无用代码

commit e9d254c4e7
Author: R2m1liA <15258427350@163.com>
Date:   Fri Jul 18 11:37:40 2025 +0800

    Fix: 修改部分文本表述

commit c85afc9bde
Author: R2m1liA <15258427350@163.com>
Date:   Fri Jul 18 11:36:08 2025 +0800

    Feature: 添加更多语言支持

src/components/ResultCard.vue

@@ -19,7 +19,7 @@
         size="large"
         variant="outlined"
       >
-        {{ value.value.toFixed(2) }} {{ value.unit }}
+        {{ value.value.toFixed(2) }} {{ $t(`units.${value.unit}`) }}
       </v-chip>
     </v-card-text>
   </v-card>