refactor(ui): 「API 密钥」更名「密钥凭据」——名实一致，承载全部凭据类型

src/components/dashboard/ApiKeysPanel.tsx

@@ -256,14 +256,15 @@ export function ApiKeysPanel() {
       {/* 顶部操作栏 */}
       <div className="flex items-center justify-between">
         <div className="flex items-center gap-2">
-          <h2 className="text-sm font-bold text-gray-700">API 管理</h2>
+          <h2 className="text-sm font-bold text-gray-700">密钥凭据</h2>
           <span className="text-xs text-gray-400 bg-gray-100 rounded-full px-2 py-0.5">
             {keys.length} 个
           </span>
+          <span className="text-[11px] text-gray-400">API Key / Token / 密码等各类凭据统一存放</span>
         </div>
         <button onClick={() => setShowModal(true)}
           className="px-3 py-1.5 rounded-md text-xs font-medium border border-blue-300 bg-blue-50 text-blue-600 hover:bg-blue-100 transition-colors">
-          + 添加 API Key
+          + 添加凭据
         </button>
       </div>
 

src/components/resources/ResourcesPage.tsx

@@ -13,7 +13,7 @@ const TABS: { id: ResourceTab; label: string }[] = [
   { id: "servers", label: "服务器" },
   { id: "software", label: "软件仓库" },
   { id: "cloud", label: "云产品" },
-  { id: "apikeys", label: "API 密钥" },
+  { id: "apikeys", label: "密钥凭据" },
   { id: "source", label: "源码库" },
 ];