feat(admin): 从已有玩家升级代理、修复 i18n 与过期 .js 冲突

- 新建一级代理改为选择已有玩家；新建用户可选一级代理

- 操作日志/注单等扁平 key 翻译；清理 src 内误生成 .js，Vite 优先解析 .ts

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/admin/src/components/AdminLocaleFlag.vue

@@ -0,0 +1,42 @@
+<script setup lang="ts">
+import { computed } from 'vue';
+import type { AdminLocale } from '../i18n/admin-messages';
+
+const LOCALE_COUNTRY: Record<AdminLocale, string> = {
+  'zh-CN': 'cn',
+  'en-US': 'us',
+  'ms-MY': 'my',
+};
+
+const props = withDefaults(
+  defineProps<{ locale: AdminLocale | string; size?: number }>(),
+  { size: 18 },
+);
+
+const countryCode = computed(() => {
+  const code = props.locale as AdminLocale;
+  return LOCALE_COUNTRY[code] ?? 'us';
+});
+
+const src = computed(() => `/flags/${countryCode.value}.svg`);
+</script>
+
+<template>
+  <img
+    :src="src"
+    :width="size"
+    :height="Math.round(size * 0.67)"
+    class="admin-locale-flag-img"
+    :alt="countryCode"
+  />
+</template>
+
+<style scoped>
+.admin-locale-flag-img {
+  display: block;
+  flex-shrink: 0;
+  border-radius: 2px;
+  object-fit: cover;
+  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12);
+}
+</style>