fix: P2/P3审计问题修复 + 更新审计文档移除已修复问题

- 修复schema前缀：确认central_kitchen/mv_distribution/mv_dish_sales等表在public schema，撤销错误的analytics.前缀
- 移除API内部物化视图刷新：mv_distribution_monthly/mv_dish_sales_monthly改为console.warn
- 修复BOM树节点key：使用path字段替代material_code+level确保唯一性
- 修复HR人才矩阵potential_score：基于v3_learning_record动态计算替代硬编码60
- 修复StoreDetailPage公司均值：优先使用API返回的companyAvg
- 修复前端字段名匹配：discount_rate_pct/check_comment等
- 添加explicit column list和LIMIT到大型查询
- 更新数据溯源审计.md：移除全部52个已修复/确认无需修复的问题条目

server/src/routes/store-expense.ts

@@ -376,6 +376,7 @@ router.get('/efficiency', async (req: AuthRequest, res) => {
         round(bill_count::numeric, 0) AS bill_count,
         round(received / nullif(bill_count, 0)::numeric, 2) AS avg_ticket_size,
         CASE
+          WHEN received_per_sqm < 500 THEN '坪效极低'
           WHEN received_per_sqm < 1000 THEN '坪效偏低'
           WHEN received_per_sqm < 2000 THEN '坪效一般'
           WHEN received_per_sqm < 4000 THEN '坪效良好'
@@ -438,7 +439,7 @@ router.get('/fixed-variable', async (req: AuthRequest, res) => {
         round((rent_expense + dorm_expense + repair_clean_expense * 0.5) / nullif(received, 0) * 100::numeric, 2) AS fixed_rate_pct,
         round((wage_expense + utility_expense + delivery_commission_expense + card_fee_expense + repair_clean_expense * 0.5) / nullif(received, 0) * 100::numeric, 2) AS variable_rate_pct,
         round((received - actual_food_cost - wage_expense - utility_expense - delivery_commission_expense - card_fee_expense - repair_clean_expense * 0.5)::numeric, 2) AS contribution_after_variable,
-        round((rent_expense + dorm_expense + repair_clean_expense * 0.5)::numeric, 2) AS break_even_sales
+        round((rent_expense + dorm_expense + repair_clean_expense * 0.5) / nullif(1 - actual_food_cost / nullif(received, 0), 0)::numeric, 2) AS break_even_sales
       FROM analytics.mv_store_operating_expense_monthly
       ${where}
       ORDER BY ${sortCol} ${order} NULLS LAST LIMIT $${params.length + 1} OFFSET $${params.length + 2}
@@ -539,6 +540,16 @@ router.get('/loss-diagnosis', async (req: AuthRequest, res) => {
     const countResult = await query(`SELECT count(*) FROM analytics.mv_store_operating_expense_monthly ${where}`, params)
     const total = countResult.rows[0].count
 
+    // 全量统计（不受分页影响）
+    const evalStats = await query(`
+      SELECT
+        count(*) FILTER (WHERE actual_store_contribution_rate_pct < -20) AS p0_count,
+        count(*) FILTER (WHERE actual_store_contribution_rate_pct >= -20 AND actual_store_contribution_rate_pct < -5) AS p1_count,
+        round(sum(actual_store_contribution)::numeric, 2) AS total_loss
+      FROM analytics.mv_store_operating_expense_monthly
+      WHERE report_month = $1::date AND actual_store_contribution <= 0 AND received > 0
+    `, [month])
+
     const validSorts = ['actual_store_contribution', 'actual_store_contribution_rate_pct', 'received', 'wage_rate_pct', 'rent_rate_pct', 'utility_rate_pct', 'received_per_sqm', 'operating_expense_rate_pct']
     const sortCol = validSorts.includes(sort) ? sort : 'actual_store_contribution'
 
@@ -737,7 +748,7 @@ router.get('/loss-diagnosis', async (req: AuthRequest, res) => {
       }
     })
 
-    sendSuccess(res, rows, { page, pageSize, total })
+    sendSuccess(res, rows, { page, pageSize, total, evalStats: evalStats.rows[0] })
   } catch (err: any) {
     sendError(res, err.message)
   }