feat: 优化首页服务入口与租住业务流程

补齐首页待办跳转、押金支付引导和多类租住服务页面能力，统一租客端关键业务流程体验。

pages/index/component/SelectRoomTab.vue

@@ -28,6 +28,7 @@
     >
       <swiper-item>
         <SelectRoomHero
+          :is-active="currentScreen === 0"
           :language="currentLang"
           :banner-list="bannerList"
           :current-banner="currentBanner"
@@ -48,6 +49,7 @@
           :show-scrollbar="false"
         >
           <SelectRoomAreaPanel
+            :is-active="currentScreen === 1"
             :language="currentLang"
             :banner-list="bannerList"
             :current-banner-index="currentBannerIndex"
@@ -431,10 +433,18 @@ export default {
       })
     },
     handleBannerChange(index) {
-      this.currentBannerIndex = index
+      const nextIndex = Number(index)
+      if (!Number.isFinite(nextIndex) || nextIndex === this.currentBannerIndex) {
+        return
+      }
+      this.currentBannerIndex = nextIndex
     },
     switchBanner(index) {
-      this.currentBannerIndex = index
+      const nextIndex = Number(index)
+      if (!Number.isFinite(nextIndex) || nextIndex === this.currentBannerIndex) {
+        return
+      }
+      this.currentBannerIndex = nextIndex
     },
     collapseToTopBanner() {
       this.currentScreen = 1