feat(frontend): HashRouter->BrowserRouter 干净URL可独立索引 + 静态预渲染(SSR注入#root/robots/sitemap) + logo回顶

frontend/src/pages/front/ProfilePage.tsx

@@ -678,8 +678,8 @@ const MembershipContent: React.FC<MembershipContentProps> = ({ user, memberPlan
             </div>
 
             <div className="membership-actions">
-              <button className="btn-primary" onClick={() => { window.location.hash = '#/pricing'; }}>续费会员</button>
-              <button className="btn-secondary" onClick={() => { window.location.hash = '#/pricing'; }}>升级会员</button>
+              <button className="btn-primary" onClick={() => { window.location.href = '/pricing'; }}>续费会员</button>
+              <button className="btn-secondary" onClick={() => { window.location.href = '/pricing'; }}>升级会员</button>
             </div>
           </>
         )}
@@ -692,7 +692,7 @@ const MembershipContent: React.FC<MembershipContentProps> = ({ user, memberPlan
               onClick={(e) => {
                 e.preventDefault();
                 e.stopPropagation();
-                window.location.hash = '#/pricing';
+                window.location.href = '/pricing';
               }}
             >
               开通会员