修复首页专区无法切回全部:专区与筛选持久化解耦

zone 此前被纳入 URL/sessionStorage 持久化体系,切回全部专区时
空 query 会回退读取残留的旧 zone 导致专区被弹回。改为纯内存视图
状态,专区可自由切换、不参与筛选持久化。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/features/listings/composables/useHomeFilterQuery.ts

@@ -1,9 +1,10 @@
 import type { LocationQuery, LocationQueryRaw } from 'vue-router'
 
+// 注意：zone（专区）不纳入筛选持久化体系，作为独立的视图切换状态。
+// 否则切回“全部专区”时，空 query 会回退读取 sessionStorage 中残留的旧 zone，导致专区被弹回。
 export const desktopHomeFilterQueryKeys = [
   'keyword',
   'sort',
-  'zone',
   'server',
   'region',
   'login_method',

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

@@ -189,7 +189,7 @@ function applyRouteQueryToHomeState() {
   filters.minFireLevel = readQueryNumber(query, 'min_fire_level')
   filters.maxFireLevel = readQueryNumber(query, 'max_fire_level')
   sortBy.value = readQueryString(query, 'sort') || 'recommended'
-  activeZone.value = readQueryString(query, 'zone') || 'all'
+  // zone 不从 query/storage 恢复，由用户实时点击决定，不参与筛选持久化
 }
 
 function desktopHomeStateSignature() {
@@ -213,7 +213,6 @@ function buildDesktopHomeQueryValues(): Record<string, HomeQueryValue> {
   return {
     keyword: filters.keyword.trim() || undefined,
     sort: sortBy.value === 'recommended' ? undefined : sortBy.value,
-    zone: activeZone.value === 'all' ? undefined : activeZone.value,
     server: filters.server,
     region: filters.region,
     login_method: filters.loginMethod,