feat: 移除API Key账号绑定的专属类型限制

- 允许所有账号类型被API Key绑定，不再限制必须是dedicated类型
- 移除AccountSelector组件中的accountType === 'dedicated'过滤条件
- 保持原有专属账号的显示文本不变，确保界面一致性
- 维持原有调度策略：绑定账号后只使用该账号，不回退到共享池

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

web/admin-spa/src/components/common/AccountSelector.vue

@@ -298,12 +298,8 @@ const filteredGroups = computed(() => {
 
 // 过滤的 OAuth 账号
 const filteredOAuthAccounts = computed(() => {
-  let accounts = sortedAccounts.value.filter(
-    (a) =>
-      a.accountType === 'dedicated' &&
-      (props.platform === 'claude'
-        ? a.platform === 'claude-oauth'
-        : a.platform !== 'claude-console')
+  let accounts = sortedAccounts.value.filter((a) =>
+    props.platform === 'claude' ? a.platform === 'claude-oauth' : a.platform !== 'claude-console'
   )
 
   if (searchQuery.value) {
@@ -318,9 +314,7 @@ const filteredOAuthAccounts = computed(() => {
 const filteredConsoleAccounts = computed(() => {
   if (props.platform !== 'claude') return []
 
-  let accounts = sortedAccounts.value.filter(
-    (a) => a.accountType === 'dedicated' && a.platform === 'claude-console'
-  )
+  let accounts = sortedAccounts.value.filter((a) => a.platform === 'claude-console')
 
   if (searchQuery.value) {
     const query = searchQuery.value.toLowerCase()