feat: 主页右上角添加用户信息组件

- index.ui: 拆分导航栏为HBox(logo+链接+CTA | 用户信息)
- portal_userinfo.ui: 未登录显示登录/注册按钮，已登录显示用户头像+用户名
- user_menu.ui: 登录后下拉菜单(个人信息、退出登录)
- cms_styles.css: 添加用户信息区域样式

wwwroot/cms_styles.css

@@ -638,3 +638,47 @@ a { color: inherit; text-decoration: none; }
     opacity: 1;
     transform: translateY(0);
 }
+
+/* Portal User Info Widgets */
+.portal-user-info {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.portal-username {
+    font-size: 14px;
+    color: var(--text-secondary);
+    max-width: 100px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.portal-login-btn,
+.portal-register-btn {
+    font-size: 13px !important;
+    padding: 6px 16px !important;
+    border-radius: 6px !important;
+    border: none !important;
+    cursor: pointer !important;
+    transition: var(--transition);
+}
+
+.portal-login-btn {
+    background: rgba(255,255,255,0.1) !important;
+    color: var(--text-primary) !important;
+}
+
+.portal-login-btn:hover {
+    background: rgba(255,255,255,0.2) !important;
+}
+
+.portal-register-btn {
+    background: var(--brand-gradient) !important;
+    color: white !important;
+}
+
+.portal-register-btn:hover {
+    opacity: 0.9;
+}

wwwroot/portal_userinfo.ui

@@ -0,0 +1,89 @@
+{% if get_user() %}
+{
+	"widgettype": "HBox",
+	"options": {
+		"css": "portal-user-info clickable",
+		"width": "auto"
+	},
+	"binds": [
+		{
+			"wid": "self",
+			"event": "click",
+			"actiontype": "urlwidget",
+			"popup_options": {
+				"eventpos": true,
+				"cwidth": 10,
+				"dismiss_events": ["command"]
+			},
+			"target": "Popup",
+			"options": {
+				"url": "{{entire_url('user_menu.ui')}}"
+			}
+		}
+	],
+	"subwidgets": [
+		{
+			"widgettype": "Svg",
+			"options": {
+				"url": "{{entire_url('/bricks/imgs/user.svg')}}",
+				"rate": 1.3
+			}
+		},
+		{
+			"widgettype": "Text",
+			"options": {
+				"css": "portal-username",
+				"text": "{{get_username()}}"
+			}
+		}
+	]
+}
+{% else %}
+{
+	"widgettype": "HBox",
+	"options": {
+		"css": "portal-user-info",
+		"width": "auto"
+	},
+	"subwidgets": [
+		{
+			"widgettype": "Button",
+			"options": {
+				"label": "登录",
+				"css": "portal-login-btn",
+				"i18n": true
+			},
+			"binds": [
+				{
+					"wid": "self",
+					"event": "click",
+					"actiontype": "urlwidget",
+					"target": "self",
+					"options": {
+						"url": "{{entire_url('/rbac/user/login.ui')}}"
+					}
+				}
+			]
+		},
+		{
+			"widgettype": "Button",
+			"options": {
+				"label": "注册",
+				"css": "portal-register-btn",
+				"i18n": true
+			},
+			"binds": [
+				{
+					"wid": "self",
+					"event": "click",
+					"actiontype": "urlwidget",
+					"target": "self",
+					"options": {
+						"url": "{{entire_url('/rbac/user/register.ui')}}"
+					}
+				}
+			]
+		}
+	]
+}
+{% endif %}

wwwroot/user_menu.ui

@@ -0,0 +1,18 @@
+{
+	"widgettype": "Menu",
+	"options": {
+		"cwidth": 10,
+		"items": [
+			{
+				"name": "profile",
+				"label": "个人信息",
+				"submenu": "{{entire_url('/rbac/user/userinfo.ui')}}"
+			},
+			{
+				"name": "logout",
+				"label": "退出登录",
+				"submenu": "{{entire_url('/rbac/user/logout.dspy')}}"
+			}
+		]
+	}
+}