业务更名为撞车并切换crash路由

用户可见文案与页面/API路径改为撞车与crash，保留mohong表与权限码兼容；移动端入口去掉租/撞图标。

frontend/src/features/listings/views/HomeView.vue

@@ -260,8 +260,8 @@ loadHome()
           <strong>租号大厅</strong>
           <small>高哈夫币 · 安全交接 · 随租随玩</small>
         </RouterLink>
-        <RouterLink class="biz-entry mohong" to="/mohong">
-          <strong>摸大红 <em>NEW</em></strong>
+        <RouterLink class="biz-entry crash" to="/crash">
+          <strong>撞车 <em>NEW</em></strong>
           <small>选购商品 · 支付后进群联系客服</small>
         </RouterLink>
       </div>
@@ -372,7 +372,7 @@ loadHome()
   font-size: 13px;
 }
 
-.biz-entry.mohong strong em {
+.biz-entry.crash strong em {
   margin-left: 6px;
   padding: 1px 6px;
   border-radius: 999px;

frontend/src/features/listings/views/MobileHomeView.css

@@ -364,28 +364,6 @@
   box-shadow: 0 4px 14px rgba(23, 35, 61, 0.04);
 }
 
-.biz-entry-icon {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  width: 30px;
-  height: 30px;
-  border-radius: 9px;
-  font-size: 13px;
-  font-weight: 800;
-  margin-bottom: 2px;
-}
-
-.biz-entry-icon.rental {
-  background: #fff1e6;
-  color: #ff6a00;
-}
-
-.biz-entry-icon.mohong {
-  background: #fee2e2;
-  color: #dc2626;
-}
-
 .biz-entry strong {
   color: #17233d;
   font-size: 15px;

frontend/src/features/listings/views/MobileHomeView.vue

@@ -818,13 +818,11 @@ syncMobileHomeQuery()
 
           <div class="biz-entry-grid" aria-label="业务入口">
             <RouterLink class="biz-entry" to="/">
-              <span class="biz-entry-icon rental">租</span>
               <strong>租号大厅</strong>
               <small>高哈夫币 · 随租随玩</small>
             </RouterLink>
-            <RouterLink class="biz-entry" to="/mohong">
-              <span class="biz-entry-icon mohong">红</span>
-              <strong>摸大红</strong>
+            <RouterLink class="biz-entry" to="/crash">
+              <strong>撞车</strong>
               <small>选购商品 · 一键找客服</small>
               <em class="biz-entry-badge">NEW</em>
             </RouterLink>