feat: 登陆注册UI调整，用户协议和隐私政策跳转调整

src/components/Navbars/HomeNavbar.js

@@ -36,6 +36,7 @@ import { ChevronDownIcon, HamburgerIcon, SunIcon, MoonIcon } from '@chakra-ui/ic
 import { FiStar, FiCalendar } from 'react-icons/fi';
 import { useNavigate } from 'react-router-dom';
 import { useAuth } from '../../contexts/AuthContext';
+import { useAuthModal } from '../../contexts/AuthModalContext';
 
 /** 桌面端导航 - 完全按照原网站
  * @TODO 添加逻辑  不展示导航case
@@ -200,6 +201,7 @@ export default function HomeNavbar() {
     const navigate = useNavigate();
     const isMobile = useBreakpointValue({ base: true, md: false });
     const { user, isAuthenticated, logout, isLoading } = useAuth();
+    const { openAuthModal } = useAuthModal();
     const { colorMode, toggleColorMode } = useColorMode();
     const navbarBg = useColorModeValue('white', 'gray.800');
     const navbarBorder = useColorModeValue('gray.200', 'gray.700');
@@ -231,10 +233,6 @@ export default function HomeNavbar() {
         }
     };
 
-    // 处理登录按钮点击
-    const handleLoginClick = () => {
-        navigate('/auth/signin');
-    };
 
     // 检查是否为禁用的链接（没有NEW标签的链接）
     // const isDisabledLink = true;
@@ -733,13 +731,13 @@ export default function HomeNavbar() {
                                     </Menu>
                                 </HStack>
                             ) : (
-                                // 未登录状态
+                                // 未登录状态 - 单一按钮
                                 <Button
                                     colorScheme="blue"
                                     variant="solid"
                                     size="sm"
                                     borderRadius="full"
-                                    onClick={handleLoginClick}
+                                    onClick={() => openAuthModal()}
                                     _hover={{
                                         transform: "translateY(-1px)",
                                         boxShadow: "md"
@@ -960,7 +958,7 @@ export default function HomeNavbar() {
                                         colorScheme="blue"
                                         size="sm"
                                         onClick={() => {
-                                            handleLoginClick();
+                                            openAuthModal();
                                             onClose();
                                         }}
                                     >