feat(player,admin): 钱包卡片与登录页 UI 优化

- 玩家端我的页：钱包背景图、银行卡式排版、自定义语言下拉与投注规则折叠

- 管理端登录：左右布局、金边半透明卡片、自定义语言选择

- 修复 API promotePlayerToTier1Agent 返回类型导致编译失败

apps/admin/src/components/AdminLocaleSwitcher.vue

@@ -1,41 +1,177 @@
 <script setup lang="ts">
+import { ref, computed, onMounted, onUnmounted } from 'vue';
 import { useAdminLocale, type AdminLocale } from '../composables/useAdminLocale';
 import AdminLocaleFlag from './AdminLocaleFlag.vue';
 
+withDefaults(
+  defineProps<{
+    /** gold：与玩家端登录一致；admin：管理后台顶栏绿色主题 */
+    variant?: 'gold' | 'admin';
+  }>(),
+  { variant: 'admin' },
+);
+
 const { locale, locales, setLocale, t } = useAdminLocale();
 
-function onChange(e: Event) {
-  setLocale((e.target as HTMLSelectElement).value as AdminLocale);
+const open = ref(false);
+const root = ref<HTMLElement | null>(null);
+
+const currentLabel = computed(
+  () => locales.find((l) => l.code === locale.value)?.label ?? locale.value,
+);
+
+function pick(code: AdminLocale) {
+  open.value = false;
+  setLocale(code);
 }
+
+function toggle() {
+  open.value = !open.value;
+}
+
+function onDocClick(e: MouseEvent) {
+  if (!root.value?.contains(e.target as Node)) open.value = false;
+}
+
+onMounted(() => document.addEventListener('click', onDocClick));
+onUnmounted(() => document.removeEventListener('click', onDocClick));
 </script>
 
 <template>
-  <label class="admin-locale" :title="t('lang')">
-    <AdminLocaleFlag :locale="locale" :size="20" />
-    <select :value="locale" class="admin-locale-select" :aria-label="t('lang')" @change="onChange">
-      <option v-for="l in locales" :key="l.code" :value="l.code">
-        {{ l.label }}
-      </option>
-    </select>
-  </label>
+  <div ref="root" class="admin-locale" :class="[variant, { open }]">
+    <button
+      type="button"
+      class="admin-locale-trigger"
+      :aria-expanded="open"
+      aria-haspopup="listbox"
+      :title="t('lang')"
+      @click.stop="toggle"
+    >
+      <AdminLocaleFlag :locale="locale" :size="20" />
+      <span class="admin-locale-label">{{ currentLabel }}</span>
+      <span class="locale-chevron" aria-hidden="true">▾</span>
+    </button>
+    <ul v-show="open" class="admin-locale-menu" role="listbox" :aria-label="t('lang')">
+      <li
+        v-for="l in locales"
+        :key="l.code"
+        role="option"
+        :aria-selected="locale === l.code"
+        class="admin-locale-option"
+        :class="{ active: locale === l.code }"
+        @click="pick(l.code)"
+      >
+        <AdminLocaleFlag :locale="l.code" :size="18" />
+        <span>{{ l.label }}</span>
+      </li>
+    </ul>
+  </div>
 </template>
 
 <style scoped>
 .admin-locale {
+  position: relative;
+  display: inline-flex;
+}
+
+.admin-locale-trigger {
   display: inline-flex;
   align-items: center;
   gap: 8px;
-}
-.admin-locale-select {
-  background: #0d0d0d;
-  color: var(--green-text);
-  border: 1px solid var(--green-border);
+  min-width: 120px;
+  padding: 5px 10px 5px 8px;
   border-radius: 6px;
-  padding: 5px 24px 5px 8px;
   font-size: 12px;
   font-weight: 600;
-  min-width: 120px;
+  font-family: inherit;
   cursor: pointer;
   line-height: 1.2;
 }
+
+.admin-locale-label {
+  flex: 1;
+  text-align: left;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.locale-chevron {
+  font-size: 10px;
+  opacity: 0.7;
+  transition: transform 0.15s ease;
+}
+
+.admin-locale.open .locale-chevron {
+  transform: rotate(180deg);
+}
+
+.admin-locale-menu {
+  position: absolute;
+  top: calc(100% + 4px);
+  right: 0;
+  z-index: 50;
+  min-width: 100%;
+  margin: 0;
+  padding: 4px;
+  list-style: none;
+  border-radius: 8px;
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.55);
+}
+
+.admin-locale-option {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 10px;
+  border-radius: 6px;
+  font-size: 12px;
+  font-weight: 600;
+  cursor: pointer;
+  white-space: nowrap;
+}
+
+/* 管理顶栏 */
+.admin-locale.admin .admin-locale-trigger {
+  background: #0d0d0d;
+  color: var(--green-text);
+  border: 1px solid var(--green-border);
+}
+
+.admin-locale.admin .admin-locale-menu {
+  background: #0f1411;
+  border: 1px solid var(--green-border);
+}
+
+.admin-locale.admin .admin-locale-option {
+  color: #8ab89a;
+}
+
+.admin-locale.admin .admin-locale-option:hover,
+.admin-locale.admin .admin-locale-option.active {
+  background: var(--green-surface);
+  color: var(--green-text);
+}
+
+/* 登录页：与玩家端金色主题一致 */
+.admin-locale.gold .admin-locale-trigger {
+  background: #0d0d0d;
+  color: #f0d875;
+  border: 1px solid rgba(212, 175, 55, 0.28);
+}
+
+.admin-locale.gold .admin-locale-menu {
+  background: #141414;
+  border: 1px solid rgba(212, 175, 55, 0.28);
+}
+
+.admin-locale.gold .admin-locale-option {
+  color: #8e8e93;
+}
+
+.admin-locale.gold .admin-locale-option:hover,
+.admin-locale.gold .admin-locale-option.active {
+  background: rgba(212, 175, 55, 0.1);
+  color: #f0d875;
+}
 </style>