fix: 修复3个高优先级Bug + 5个中低优先级问题

BUG-01: recurring /sync next_date 更新逻辑错误（应用循环后的 next）
BUG-02: bills onReachBottom loading 缺 .value
BUG-03: group store switchToPersonal 缺少 await (3处)
OPT-04: notification requireNotificationEditAuth 加 try-catch
OPT-05: category 迁移源分类条件改为 is_custom=1 AND user_id=?
OPT-06: user 旧头像删除加 try-catch + 日志
CODE-02: format.ts 跨年日期显示年份
CODE-05: notification isValidUrl 去掉相对路径允许

client/src/pages/bills/index.vue

@@ -242,7 +242,7 @@ async function onDelete(item: any) {
 
 // 触底加载更多
 onReachBottom(() => {
-  if (noMore.value || loading) return
+  if (noMore.value || loading.value) return
   page.value++
   loadTx(false)
 })

client/src/stores/group.ts

@@ -55,7 +55,7 @@ export const useGroupStore = defineStore('group', () => {
       if (currentGroupId.value !== null) {
         const stillValid = groups.value.some(g => g.id === currentGroupId.value)
         if (!stillValid) {
-          switchToPersonal()
+          await switchToPersonal()
         }
       }
     } catch {
@@ -83,7 +83,7 @@ export const useGroupStore = defineStore('group', () => {
   async function leaveGroup(groupId: number) {
     await api.leaveGroup(groupId)
     if (currentGroupId.value === groupId) {
-      switchToPersonal()
+      await switchToPersonal()
     }
     await fetchGroups()
   }
@@ -92,7 +92,7 @@ export const useGroupStore = defineStore('group', () => {
   async function deleteGroup(groupId: number) {
     await api.deleteGroup(groupId)
     if (currentGroupId.value === groupId) {
-      switchToPersonal()
+      await switchToPersonal()
     }
     await fetchGroups()
   }

client/src/utils/format.ts

@@ -36,7 +36,11 @@ export function formatDate(date: string | Date): string {
   if (diff === 1) return '昨天'
   if (diff === 2) return '前天'
 
-  return `${d.getMonth() + 1}月${d.getDate()}日`
+  // 跨年显示年份
+  const isCurrentYear = d.getFullYear() === now.getFullYear()
+  return isCurrentYear
+    ? `${d.getMonth() + 1}月${d.getDate()}日`
+    : `${d.getFullYear()}年${d.getMonth() + 1}月${d.getDate()}日`
 }
 
 export function formatMonth(date: string): string {