polish auth entry surfaces

src/web/pages/UserRegister.tsx

@@ -113,7 +113,6 @@ export default function UserRegister({ onLogin }: { onLogin?: () => void }) {
         </div>
       )}
     >
-      <OAuthSlot t={(text) => text} variant="user" mode="register" />
       <form onSubmit={handleSubmit} className="login-register-form">
         <div className="login-register-grid">
           <div className="login-field-group">
@@ -234,6 +233,7 @@ export default function UserRegister({ onLogin }: { onLogin?: () => void }) {
           )}
         </button>
       </form>
+      <OAuthSlot t={(text) => text} variant="user" mode="register" />
     </LoginShell>
   );
 }

src/web/pages/auth/LoginShell.tsx

@@ -51,7 +51,7 @@ export default function LoginShell({
           >
             <div className="brand-mark-frame brand-mark-frame-hero">
               <div className="brand-mark-canvas">
-                <img src="/logo.png" alt="BoosAPI" className="login-brand-logo" />
+                <img src="/logo.png" alt="BossAI" className="login-brand-logo" />
               </div>
             </div>
             <div
@@ -104,12 +104,12 @@ export default function LoginShell({
             <div className="login-auth-eyebrow">{eyebrow}</div>
             <h2 className="login-auth-title">{title}</h2>
             <p className="login-auth-copy">{description}</p>
-            {children}
             {error && (
               <div className="alert alert-error animate-shake" style={{ marginBottom: 12 }}>
                 {error}
               </div>
             )}
+            {children}
             {footer && <div className="login-auth-footer">{footer}</div>}
           </div>
         </section>

src/web/pages/auth/OAuthSlot.tsx

@@ -1,4 +1,5 @@
 import React from 'react';
+import { BrandGlyph } from '../../components/BrandIcon.js';
 
 export interface OAuthSlotProps {
   t: (text: string) => string;
@@ -17,16 +18,17 @@ export interface OAuthSlotProps {
  * does not touch `authSession`. Tests assert that property.
  */
 const OAUTH_PROVIDER_KEYS = [
-  { key: 'google', label: 'Google' },
-  { key: 'github', label: 'GitHub' },
-  { key: 'wechat', label: '微信' },
+  { key: 'google', label: 'Google', icon: 'google-color' },
+  { key: 'github', label: 'GitHub', icon: 'github' },
+  { key: 'wechat', label: '微信', icon: 'wechat-color' },
 ];
 
 export default function OAuthSlot({ t, mode = 'login' }: OAuthSlotProps) {
   const title = mode === 'register' ? t('第三方账号快速注册') : t('第三方登录');
   const desc = mode === 'register'
-    ? t('OAuth 接入后可自动创建账号并绑定同一用户身份。')
-    : t('即将支持配置后的 OAuth 提供商。');
+    ? t('接入后可自动创建账号，并绑定同一用户身份。')
+    : t('管理员配置 OAuth 后即可启用这些入口。');
+  const pendingLabel = t('待配置');
 
   return (
     <div
@@ -48,8 +50,18 @@ export default function OAuthSlot({ t, mode = 'login' }: OAuthSlotProps) {
             data-provider={provider.key}
             title={t('等待管理员配置 OAuth 后启用')}
           >
-            <span className="login-oauth-provider-mark">{provider.label.slice(0, 1)}</span>
-            <span>{provider.label}</span>
+            <span className="login-oauth-provider-mark" aria-hidden="true">
+              <BrandGlyph
+                icon={provider.icon}
+                alt=""
+                size={18}
+                fallbackText={provider.label}
+              />
+            </span>
+            <span className="login-oauth-provider-copy">
+              <span className="login-oauth-provider-name">{provider.label}</span>
+              <span className="login-oauth-provider-state">{pendingLabel}</span>
+            </span>
           </button>
         ))}
       </div>