feat(listings): 押金筛选高档位细分为 200-400 / 400-600 / 600以上

- 桌面高级筛选「押金」去掉 200以上，改为 200-400 并新增 400-600、600以上
- 移动端押金档位改为复用 depositRangeOptions，两端档位保持一致
- 补充 depositRangeOptions 档位与边界断言

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

@@ -40,6 +40,7 @@ import {
   storeHomeQuery,
   type HomeQueryValue,
 } from '@/features/listings/composables/useHomeFilterQuery'
+import { depositRangeOptions } from '@/features/listings/composables/useFilterOptions'
 import {
   getListingChips,
   getListingDisplayPrice,
@@ -138,6 +139,15 @@ const zoneOptions = [
   { key: 'highCoin', label: '高币', hint: '100M以上' },
 ]
 
+/** 押金档位直接复用首页高级筛选项，保证移动端与桌面端完全一致 */
+const depositPresets = depositRangeOptions
+  .filter(option => option.label !== '全部')
+  .map(option => ({
+    label: option.label,
+    min: option.min === undefined ? '' : String(option.min),
+    max: option.max === undefined ? '' : String(option.max),
+  }))
+
 const rangePresets: Record<string, Array<{ label: string; min: string; max: string }>> = {
   price: [
     { label: '50-100', min: '50', max: '100' },
@@ -154,12 +164,7 @@ const rangePresets: Record<string, Array<{ label: string; min: string; max: stri
     { label: '30-40', min: '30', max: '40' },
     { label: '40以上', min: '40', max: '' },
   ],
-  deposit: [
-    { label: '0-50', min: '0', max: '50' },
-    { label: '50-100', min: '50', max: '100' },
-    { label: '100-200', min: '100', max: '200' },
-    { label: '200以上', min: '200', max: '' },
-  ],
+  deposit: depositPresets,
   total: [
     { label: '0-500', min: '0', max: '500' },
     { label: '500-1000', min: '500', max: '1000' },