fix: 分类筛选改为单选（手机端操作优化）

web/src/App.vue

@@ -115,35 +115,40 @@ const handleRandom = async () => {
 }
 
 const handleSelectType = (typeId) => {
-  const ids = filterTypeIds.value
-  const idx = ids.indexOf(typeId)
-  if (idx >= 0) ids.splice(idx, 1)
-  else ids.push(typeId)
+  // 单选：点同一个取消，点别的切换
+  if (filterTypeIds.value.length === 1 && filterTypeIds.value[0] === typeId) {
+    filterTypeIds.value = []
+  } else {
+    filterTypeIds.value = [typeId]
+  }
   filterCrowdIds.value = []
-  const query = ids.length ? { type_ids: ids.join(',') } : {}
+  const query = filterTypeIds.value.length ? { type_ids: filterTypeIds.value.join(',') } : {}
   router.push({ path: '/', query })
 }
 
 const handleSelectCrowd = (crowdId) => {
-  const ids = filterCrowdIds.value
-  const idx = ids.indexOf(crowdId)
-  if (idx >= 0) ids.splice(idx, 1)
-  else ids.push(crowdId)
+  // 单选：点同一个取消，点别的切换
+  if (filterCrowdIds.value.length === 1 && filterCrowdIds.value[0] === crowdId) {
+    filterCrowdIds.value = []
+  } else {
+    filterCrowdIds.value = [crowdId]
+  }
   filterTypeIds.value = []
-  const query = ids.length ? { crowd_ids: ids.join(',') } : {}
+  const query = filterCrowdIds.value.length ? { crowd_ids: filterCrowdIds.value.join(',') } : {}
   router.push({ path: '/', query })
   // 移动端关闭菜单
   menuOpen.value = false
 }
 
-// 抽屉菜单选择分类
+// 抽屉菜单选择分类（单选）
 const handleDrawerSelectType = (typeId) => {
-  const ids = filterTypeIds.value
-  const idx = ids.indexOf(typeId)
-  if (idx >= 0) ids.splice(idx, 1)
-  else ids.push(typeId)
+  if (filterTypeIds.value.length === 1 && filterTypeIds.value[0] === typeId) {
+    filterTypeIds.value = []
+  } else {
+    filterTypeIds.value = [typeId]
+  }
   filterCrowdIds.value = []
-  const query = ids.length ? { type_ids: ids.join(',') } : {}
+  const query = filterTypeIds.value.length ? { type_ids: filterTypeIds.value.join(',') } : {}
   router.push({ path: '/', query })
   // 移动端关闭菜单
   menuOpen.value = false