feat: 手动充值、邀请码注册与后台管理增强

新增玩家手动充值全流程（收款方式配置、充值下单/审核、钱包上分），
支持邀请码注册、邀请历史与专属返水率；完善后台代理/玩家管理与响应式操作栏，
并补充前台注册、充值页及多语言错误码。

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

apps/player/src/components/LocaleSwitcher.vue

@@ -48,10 +48,7 @@ onUnmounted(() => {
   <div ref="root" class="locale-switch" :class="{ compact, open }">
     <button type="button" class="locale-trigger" :aria-expanded="open" aria-haspopup="listbox" @click.stop="toggle">
       <LocaleFlag :locale="locale" :size="compact ? 16 : 18" />
-      <span class="locale-label">{{ currentLabel }}</span>
-      <span class="locale-chevron" aria-hidden="true">▾</span>
-    </button>
-    <ul v-show="open" class="locale-menu" role="listbox" :aria-label="compact ? 'Language' : undefined">
+    </button>    <ul v-show="open" class="locale-menu" role="listbox" :aria-label="compact ? 'Language' : undefined">
       <li
         v-for="l in locales"
         :key="l.code"
@@ -72,14 +69,16 @@ onUnmounted(() => {
 .locale-switch {
   position: relative;
   display: inline-flex;
+  flex-shrink: 0;
 }
 
 .locale-trigger {
   display: inline-flex;
   align-items: center;
-  gap: 5px;
+  justify-content: center;
+  width: 36px;
   height: 36px;
-  padding: 0 8px 0 6px;
+  padding: 0;
   border: 1px solid var(--border);
   border-radius: 6px;
   background: #0d0d0d;
@@ -89,29 +88,12 @@ onUnmounted(() => {
   font-family: inherit;
   cursor: pointer;
   box-sizing: border-box;
+  flex-shrink: 0;
 }
 
 .locale-switch.compact .locale-trigger {
-  height: auto;
-  min-height: 30px;
-  padding: 4px 6px 4px 5px;
-}
-
-.locale-label {
-  max-width: 120px;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.locale-chevron {
-  font-size: 10px;
-  color: var(--text-muted);
-  transition: transform 0.15s ease;
-}
-
-.locale-switch.open .locale-chevron {
-  transform: rotate(180deg);
+  width: 30px;
+  height: 30px;
 }
 
 .locale-menu {