fix(branding): 统一Logo色调与App主色调 #6C5CE7

旧Logo用 #9B5CF6/#D946EF 紫粉渐变，与App主色 #6C5CE7 不一致。
现统一为 Left=#6C5CE7→#7B6DEE, Right=#9B8FFF→#B8ADFF。

- 更新源SVG (genex-icon/lockup) 渐变色
- 重新生成PNG并分发至全部5个前端应用
- 修正 welcome_page EX ShaderMask 渐变色
- 替换 miniapp share-card 硬编码旧色值

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/admin-web/public/logo-full.svg

@@ -1,16 +1,16 @@
 <svg viewBox="0 0 200 72" xmlns="http://www.w3.org/2000/svg">
   <defs>
     <linearGradient id="L" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#9B5CF6"/>
+      <stop offset="0%" stop-color="#6C5CE7"/>
-      <stop offset="100%" stop-color="#A855F7"/>
+      <stop offset="100%" stop-color="#7B6DEE"/>
     </linearGradient>
     <linearGradient id="R" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <linearGradient id="EX" x1="0%" y1="0%" x2="100%" y2="0%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <mask id="notch">
       <rect x="-36" y="-36" width="72" height="72" fill="white"/>

frontend/admin-web/public/logo.svg

@@ -1,12 +1,12 @@
 <svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
   <defs>
     <linearGradient id="L" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#9B5CF6"/>
+      <stop offset="0%" stop-color="#6C5CE7"/>
-      <stop offset="100%" stop-color="#A855F7"/>
+      <stop offset="100%" stop-color="#7B6DEE"/>
     </linearGradient>
     <linearGradient id="R" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <mask id="notch">
       <rect x="-36" y="-36" width="72" height="72" fill="white"/>

frontend/genex-mobile/lib/features/auth/presentation/pages/welcome_page.dart

@@ -46,7 +46,7 @@ class WelcomePage extends StatelessWidget {
                   ),
                   ShaderMask(
                     shaderCallback: (bounds) => const LinearGradient(
-                      colors: [Color(0xFFD946EF), Color(0xFFE11D89)],
+                      colors: [Color(0xFF9B8FFF), Color(0xFFB8ADFF)],
                     ).createShader(bounds),
                     child: Text(
                       'EX',

frontend/miniapp/src/assets/images/logo_full.svg

@@ -1,16 +1,16 @@
 <svg viewBox="0 0 200 72" xmlns="http://www.w3.org/2000/svg">
   <defs>
     <linearGradient id="L" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#9B5CF6"/>
+      <stop offset="0%" stop-color="#6C5CE7"/>
-      <stop offset="100%" stop-color="#A855F7"/>
+      <stop offset="100%" stop-color="#7B6DEE"/>
     </linearGradient>
     <linearGradient id="R" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <linearGradient id="EX" x1="0%" y1="0%" x2="100%" y2="0%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <mask id="notch">
       <rect x="-36" y="-36" width="72" height="72" fill="white"/>

frontend/miniapp/src/assets/images/logo_icon.svg

@@ -1,12 +1,12 @@
 <svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
   <defs>
     <linearGradient id="L" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#9B5CF6"/>
+      <stop offset="0%" stop-color="#6C5CE7"/>
-      <stop offset="100%" stop-color="#A855F7"/>
+      <stop offset="100%" stop-color="#7B6DEE"/>
     </linearGradient>
     <linearGradient id="R" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <mask id="notch">
       <rect x="-36" y="-36" width="72" height="72" fill="white"/>

frontend/miniapp/src/components/share-card/index.tsx

@@ -70,7 +70,7 @@ CSS:
 .share-header {
   display: flex; align-items: center;
   padding: 24rpx 28rpx;
-  background: linear-gradient(135deg, #9B5CF6, #D946EF);
+  background: linear-gradient(135deg, #6C5CE7, #9B8FFF);
 }
 .share-logo {
   width: 48rpx; height: 48rpx;
@@ -81,22 +81,22 @@ CSS:
 }
 .share-logo-left {
   width: 50%; height: 100%;
-  background: linear-gradient(135deg, #9B5CF6, #A855F7);
+  background: linear-gradient(135deg, #6C5CE7, #7B6DEE);
 }
 .share-logo-right {
   width: 50%; height: 100%;
-  background: linear-gradient(135deg, #D946EF, #E11D89);
+  background: linear-gradient(135deg, #9B8FFF, #B8ADFF);
 }
 .share-brand { color: white; font-size: 26rpx; font-weight: 600; margin-left: 12rpx; }
 
 .share-body { padding: 28rpx; }
 .share-name { font-size: 32rpx; font-weight: 600; color: #141723; }
 .share-price-row { display: flex; align-items: flex-end; margin-top: 16rpx; }
-.share-price { font-size: 40rpx; font-weight: 700; color: #9B5CF6; }
+.share-price { font-size: 40rpx; font-weight: 700; color: #6C5CE7; }
 .share-face { font-size: 24rpx; color: #A0A8BE; text-decoration: line-through; margin-left: 12rpx; }
 .share-discount {
   margin-left: 12rpx; padding: 4rpx 12rpx;
-  background: linear-gradient(135deg, #9B5CF6, #D946EF);
+  background: linear-gradient(135deg, #6C5CE7, #9B8FFF);
   border-radius: 999rpx;
 }
 .share-discount-text { color: white; font-size: 22rpx; font-weight: 700; }

logo/genex-icon.svg

@@ -1,12 +1,12 @@
 <svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
   <defs>
     <linearGradient id="L" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#9B5CF6"/>
+      <stop offset="0%" stop-color="#6C5CE7"/>
-      <stop offset="100%" stop-color="#A855F7"/>
+      <stop offset="100%" stop-color="#7B6DEE"/>
     </linearGradient>
     <linearGradient id="R" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <mask id="notch">
       <rect x="-36" y="-36" width="72" height="72" fill="white"/>

logo/genex-lockup.svg

@@ -1,16 +1,16 @@
 <svg viewBox="0 0 200 72" xmlns="http://www.w3.org/2000/svg">
   <defs>
     <linearGradient id="L" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#9B5CF6"/>
+      <stop offset="0%" stop-color="#6C5CE7"/>
-      <stop offset="100%" stop-color="#A855F7"/>
+      <stop offset="100%" stop-color="#7B6DEE"/>
     </linearGradient>
     <linearGradient id="R" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <linearGradient id="EX" x1="0%" y1="0%" x2="100%" y2="0%">
-      <stop offset="0%" stop-color="#D946EF"/>
+      <stop offset="0%" stop-color="#9B8FFF"/>
-      <stop offset="100%" stop-color="#E11D89"/>
+      <stop offset="100%" stop-color="#B8ADFF"/>
     </linearGradient>
     <mask id="notch">
       <rect x="-36" y="-36" width="72" height="72" fill="white"/>