🎨 refactor(ui): scope table scrolling to console cards & refine overall layout

Summary
Implement a dedicated, reusable scrolling mechanism for all console-table pages while keeping header and sidebar fixed, plus related layout improvements.

Key Changes
• Added `.table-scroll-card` utility class
 – Provides flex column layout and internal vertical scrolling
 – Desktop height: `calc(100vh - 110px)`; Mobile (<768 px) height: `calc(100vh - 77px)`
 – Hides scrollbars cross-browser (`-ms-overflow-style`, `scrollbar-width`, `::-webkit-scrollbar`)
• Replaced global `.semi-card` scrolling rules with `.table-scroll-card` to avoid affecting non-table cards
• Updated table components (Channels, Tokens, Users, Logs, MjLogs, TaskLogs, Redemptions) to use the new class
• PageLayout
 – Footer is now suppressed for all `/console` routes
 – Confirmed only central content area scrolls; header & sidebar remain fixed
• Restored hidden scrollbar rules for `.semi-layout-content` and removed unnecessary global overrides
• Minor CSS cleanup & comment improvements for readability

Result
Console table pages now fill the viewport with smooth, internal scrolling and no visible scrollbars, while other cards and pages remain unaffected.

web/src/components/auth/RegisterForm.js

@@ -540,7 +540,7 @@ const RegisterForm = () => {
       {/* 背景模糊晕染球 */}
       <div className="blur-ball blur-ball-indigo" style={{ top: '-80px', right: '-80px', transform: 'none' }} />
       <div className="blur-ball blur-ball-teal" style={{ top: '50%', left: '-120px' }} />
-      <div className="w-full max-w-sm mt-[64px]">
+      <div className="w-full max-w-sm mt-[60px]">
         {showEmailRegister || !(status.github_oauth || status.oidc_enabled || status.wechat_login || status.linuxdo_oauth || status.telegram_oauth)
           ? renderEmailRegisterForm()
           : renderOAuthOptions()}