feat(front): unify all front user pages to DESIGN.md brand #5B5FED; fix decimal-rgba off-brand purples missed by hex normalization (MarketPage focus shadow, LoginPage radial glow)

frontend/src/pages/front/WechatBot.tsx

@@ -164,7 +164,7 @@ const WechatBot: React.FC = () => {
                 <img src={qrcode.qrcode_img} alt="微信扫码" style={{ width: '220px', height: '220px', background: '#fff', borderRadius: '8px', border: '1px solid #E5E7EB' }} />
               ) : (
                 <div style={{ width: '220px', height: '220px', display: 'flex', alignItems: 'center', justifyContent: 'center', background: '#fff', borderRadius: '8px', border: '1px solid #E5E7EB', fontSize: '12px', color: '#9CA3AF', textAlign: 'center', padding: '12px' }}>
-                    二维码图片生成失败，<a href={qrcode.qrcode_img_content} target="_blank" rel="noreferrer" style={{color:'#6C63FF'}}>请点击此处在新标签页打开</a>。
+                    二维码图片生成失败，<a href={qrcode.qrcode_img_content} target="_blank" rel="noreferrer" style={{color:'#5B5FED'}}>请点击此处在新标签页打开</a>。
                 </div>
               )}
               <div style={{ fontSize: '13px', color: polling ? '#f59e0b' : '#6B7280' }}>
@@ -216,7 +216,7 @@ const DetailItem: React.FC<{ label: string; value: any }> = ({ label, value }) =
 );
 
 const primaryBtnStyle: React.CSSProperties = {
-  padding: '8px 20px', background: '#6C63FF', border: 'none', borderRadius: '6px',
+  padding: '8px 20px', background: '#5B5FED', border: 'none', borderRadius: '6px',
   color: '#fff', fontSize: '14px', fontWeight: 500, cursor: 'pointer',
 };