perf: 简化 i18n 模块逻辑，使用 defu 替换 lodash/merge

package.json

@@ -46,6 +46,7 @@
     "c8": "^8.0.1",
     "changelogen": "^0.5.5",
     "cross-env": "^7.0.3",
+    "defu": "^6.1.3",
     "echarts": "^5.4.3",
     "eslint": "^8.56.0",
     "eslint-config-prettier": "^9.1.0",
@@ -56,7 +57,6 @@
     "lightningcss": "^1.22.1",
     "lint-staged": "^15.2.0",
     "local-pkg": "^0.5.0",
-    "lodash": "^4.17.21",
     "markdown-it-prism": "^2.3.0",
     "mockjs": "^1.1.0",
     "nprogress": "^0.2.0",

src/plugins/i18n.ts

@@ -1,22 +1,22 @@
+import { defu } from 'defu'
 import { createI18n } from 'vue-i18n'
-import _merge from 'lodash/merge'
 
-const languages = Object.entries(
-	import.meta.glob('../../locales/*/**.y(a)?ml', {
-		eager: true,
-	}),
-).map(([key, value]) => {
+const yamls = import.meta.glob('../../locales/*/**.y(a)?ml', {
+	eager: true,
+})
+
+const languages = Object.entries(yamls).map(([key, value]) => {
 	const yaml = key.endsWith('.yaml')
+	key = key.slice(14, yaml ? -5 : -4)
+	// 如果有子模块，则分割
+	if (key.includes('/')) {
+		key = key.split('/')[0]
+	}
 	// @ts-ignore
-	return [key.slice(14, yaml ? -5 : -4), value.default]
+	return { [key]: value.default }
 })
 
-const messages = {}
-
-for (const [key, value] of languages) {
-	const mergerKey = key.split('/')[0]
-	_merge(messages, { [`${mergerKey}`]: value })
-}
+const messages = defu({}, ...languages)
 
 // localStorage 中的 locale，第二个参数为默认值
 // https://vueuse.org/core/useStorage/#usestorage