fix: 全面修复 22 项问题

严重 Bug:
- NaN 金额校验绕过（add 页面 parseFloat 空字符串）
- 4 个页面补充 waitForReady（add/budget/category-manage/group-manage）
- 导出 Loading 遮罩不消失（profile exportData 缺 hideLoading）
- Store 吞掉请求错误不 re-throw（transaction/stats/budget/user）
- 分类排序 SQL 拼接改参数化查询（category PUT /sort）
- 备份接口添加管理员权限检查（backup requireAdmin）

中等问题:
- 群组加入竞态条件改为 INSERT IGNORE
- 统计页切月/切Tab添加 loadSeq 防竞态
- stats store 补全 loading 状态 + Overview 初始值补全 7 字段
- 保存成功后返回不再弹「放弃修改」确认框
- 群组管理创建/加入添加 saving 双重提交保护
- 预算页添加 onShow 刷新
- 服务端输入校验（name/color/invite_code/微信code）

UI/样式:
- 触摸目标: bell/nav-back/nav-save→88rpx, avatar-badge→64rpx, action-btn→80rpx
- :active 反馈: bell/profile-card/identity-card/id-manage/arrow/action-btn/group-btn/cat-info
- 内联样式改动态绑定（4处 spacer 使用 capsuleRight）
- FAB 文字+改用 Icon 组件
- prefers-reduced-motion 动画降级（Skeleton/profile/budget/add）
- 胶囊适配（add/category-manage/group-manage）
- CategoryIcon !important 改为 iconStyle 计算属性

文档:
- CLAUDE.md 补充 SaveSuccess/ChartWrapper 组件 + category/budget/index API

client/src/stores/budget.ts

@@ -16,8 +16,9 @@ export const useBudgetStore = defineStore('budget', () => {
     try {
       const groupStore = useGroupStore()
       budget.value = await api.getBudget(month || getCurrentMonth(), groupStore.currentGroupId)
-    } catch {
+    } catch (err) {
       budget.value = null
+      throw err
     } finally {
       loading.value = false
     }

client/src/stores/stats.ts

@@ -10,11 +10,13 @@ export type CategoryStat = api.CategoryStat
 export type TrendPoint = api.TrendPoint
 
 export const useStatsStore = defineStore('stats', () => {
-  const overview = ref<api.Overview>({ expense: 0, income: 0, count: 0, daily: 0 })
+  const overview = ref<api.Overview>({ expense: 0, income: 0, expenseCount: 0, incomeCount: 0, count: 0, daily: 0, dailyIncome: 0 })
   const categoryStats = ref<api.CategoryStat[]>([])
   const trendData = ref<api.TrendPoint[]>([])
+  const loading = ref(false)
 
   async function fetchOverview(month?: string) {
+    loading.value = true
     try {
       const groupStore = useGroupStore()
       const data = await api.getOverview({
@@ -24,11 +26,17 @@ export const useStatsStore = defineStore('stats', () => {
       overview.value = {
         expense: Number(data?.expense) || 0,
         income: Number(data?.income) || 0,
+        expenseCount: Number(data?.expenseCount) || 0,
+        incomeCount: Number(data?.incomeCount) || 0,
         count: Number(data?.count) || 0,
-        daily: Number(data?.daily) || 0
+        daily: Number(data?.daily) || 0,
+        dailyIncome: Number(data?.dailyIncome) || 0
       }
-    } catch {
-      overview.value = { expense: 0, income: 0, count: 0, daily: 0 }
+    } catch (err) {
+      overview.value = { expense: 0, income: 0, expenseCount: 0, incomeCount: 0, count: 0, daily: 0, dailyIncome: 0 }
+      throw err
+    } finally {
+      loading.value = false
     }
   }
 
@@ -41,8 +49,9 @@ export const useStatsStore = defineStore('stats', () => {
         amount: Number(item.amount) || 0,
         count: Number(item.count) || 0
       })) : []
-    } catch {
+    } catch (err) {
       categoryStats.value = []
+      throw err
     }
   }
 
@@ -54,10 +63,11 @@ export const useStatsStore = defineStore('stats', () => {
         ...item,
         amount: Number(item.amount) || 0
       })) : []
-    } catch {
+    } catch (err) {
       trendData.value = []
+      throw err
     }
   }
 
-  return { overview, categoryStats, trendData, fetchOverview, fetchCategoryStats, fetchTrend }
+  return { overview, categoryStats, trendData, loading, fetchOverview, fetchCategoryStats, fetchTrend }
 })

client/src/stores/transaction.ts

@@ -21,9 +21,10 @@ export const useTransactionStore = defineStore('transaction', () => {
       transactions.value = data.list
       total.value = data.total
       currentPage.value = data.page
-    } catch {
+    } catch (err) {
       transactions.value = []
       total.value = 0
+      throw err
     } finally {
       loading.value = false
     }

client/src/stores/user.ts

@@ -30,6 +30,7 @@ export const useUserStore = defineStore('user', () => {
       }
     } catch (e) {
       console.error('[UserStore] fetchUserInfo error:', e)
+      throw e
     } finally {
       loading.value = false
     }