feat(sponsorList): add mobile view and statistics panel

This commit introduces a new mobile-first version of the sponsor list page.

Key features:
- A responsive layout optimized for mobile devices.
- A statistics panel showing total sponsors, contribution amounts, and type distribution.
- Category filtering via a bottom navigation bar.

Additionally, the special sponsor message is now loaded from `sponsorList.json` to centralize data for both desktop and mobile views.

20251115/sponsorList/index.html

@@ -232,9 +232,7 @@
           const eventTitle = ref("");
           const logos = ref([]);
           const sponsorList = ref([]); // Load from JSON
-          const specialSponsor = ref(
-            "感谢 V World2.0 的特别赞助，现在下载 APP 并进行实名认证即可获得 RM50 的登录奖励！"
-          );
+          const specialSponsor = ref("");
 
           const typePriority = {
             cash: 4,
@@ -271,6 +269,7 @@
               }
               const sponsorListJsonData = await sponsorListResult.json();
               eventTitle.value = sponsorListJsonData.eventTitle || "活动名称";
+              specialSponsor.value = sponsorListJsonData.specialSponsor || "";
               logos.value = sponsorListJsonData.logos || [];
 
               sponsorList.value = (