feat: 2026-04-15~05-02 累积变更基线 — AI 重构 + Runtime Context + DWS 修复

涵盖（每条对应已存的审计记录）：
- AI 模块拆分：apps/backend/app/ai/apps -> prompts/（8 个 APP + app2a 派生）
  audit: 2026-04-20__ai-module-complete.md
- admin-web AI 管理套件：AIDashboard / AIOperations / AIRunLogs / AITriggers / TriggerManager
  audit: 2026-04-21__admin-web-ai-management-suite.md
- App2 财务洞察 prompt v3 -> v5.1 + 小程序 AI 接入（chat / board-finance）
  audit: 2026-04-22__app2_prompt_v5_1_and_miniprogram_ai_insight.md
- App2 prewarm 全过滤器 + AI 触发器 cron reschedule
  audit: 2026-04-21__app2-finance-prewarm-all-filters.md
  migration: 20260420_ai_trigger_jobs_and_app2_prewarm.sql / 20260421_app2_prewarm_cron_reschedule.sql
- AppType 联合类型对齐 + adminAiAppTypes.test.ts
  audit: 2026-04-30__admin_web_ai_app_type_alignment.md
- DashScope tokens_used 提取修复
  audit: 2026-04-30__backend_dashscope_tokens_used_extraction.md
- App3 线索完整详情 prompt
  audit: 2026-05-01__backend_app3_full_detail_prompt.md
- Runtime Context 沙箱（5-1~5-2 主线）：
  - 后端 schema/service + admin_runtime_context / xcx_runtime_clock 两个 router
  - admin-web RuntimeContext.tsx + miniprogram runtime-clock.ts
  - migration: 20260501__runtime_context_sandbox.sql
  - tools/db/verify_admin_web_sandbox.py + verify_sandbox_end_to_end.py
  - database/changes: 7 份 sandbox_* 验证报告
- 飞球 DWS 修复：finance_area_daily 区域汇总 + task_engine 调整
  + RLS 视图业务日上界（migration 20260502 + scripts/ops/gen_rls_business_date_migration.py）

合规：
- .gitignore 启用 tmp/ 排除
- 不入仓：apps/etl/connectors/feiqiu/.env（API_TOKEN secret，本地修改保留）

待验证清单：
- docs/audit/changes/2026-05-04__cumulative_baseline_pending_verification.md
  每个主题的功能完整性 / 上线验证几乎都未收口，按优先级 P0~P3 逐一处理

apps/backend/app/ai/prompts/app2a_finance_area_prompt.py

@@ -396,7 +396,10 @@ async def build_prompt(
     # 对比口径（所有环比字段的前置依赖 · H1）
     compare_caliber: dict[str, Any] | None = None
     try:
-        cur_start, cur_end = _calc_date_range(board_time)
+        from app.services.runtime_context import get_runtime_context
+
+        runtime_ctx = get_runtime_context(site_id)
+        cur_start, cur_end = _calc_date_range(board_time, ref_date=runtime_ctx.business_date)
         prev_start, prev_end = _calc_prev_range(board_time, cur_start, cur_end)
         cur_days = (cur_end - cur_start).days + 1
         prev_days = (prev_end - prev_start).days + 1
@@ -419,7 +422,7 @@ async def build_prompt(
     }
 
     payload: dict[str, Any] = {
-        "当前时间": datetime.now().strftime("%Y-%m-%d %H:%M"),
+        "当前时间": get_runtime_context(site_id).business_now.strftime("%Y-%m-%d %H:%M"),
         "门店编号": site_id,
         "时间维度": DIMENSION_LABELS.get(time_dimension, time_dimension),
         "区域": AREA_LABELS.get(area, area),