diff --git a/.task/feature-u7-account-tx-audit.md b/.task/feature-u7-account-tx-audit.md
index 568e734c..1eb8a7a2 100644
--- a/.task/feature-u7-account-tx-audit.md
+++ b/.task/feature-u7-account-tx-audit.md
@@ -7,13 +7,13 @@
 - 权威仓：ssh://git@git-ssh.u1680832.nyat.app:31411/weichen/Agent-System-Dev.git；目标分支：main；R0（initial_base_sha）= 4d362537d0e8755a03b1757b5bad92779a064b33
 - 工作区：/home/weichen/projects/Agent-System-Dev-wt-feature-u7-account-tx-audit（worktree）；分支：feature/u7-account-tx-audit
 
-- 授权与交付终点：用户 2026-10-12 批准账户方案 r2 新增（R13–R15、KTD11–14、U7）并授权连续推进到「PR 可合入」。本任务交付账户事务、审计、只读打开、凭据输入输出与 capabilities。合入由用户执行。
-- 交付模式：authorized-continuous（阶段 1–5 已批准；6–9 按该授权执行，不代签人工测试/Review/合入结论）
-- 合入执行：用户
-- 自动推进授权：有；授权范围：规格、Backend 实现与测试、Dev 规格/pin/弃用说明、推送与建 PR；授权来源：2026-10-12 会话对实施计划的确认（approve_continuous，顺序 U8→U7→RDM）；授权终点：Backend PR 与 Dev pin PR 可合入；停止条件：需改 scripts/svc.sh、对外 HTTP 响应形状或登录页，或需 live 实例/共享 PG 写入/部署，或身份严格核验必须同时改 svc
-- 当前阶段：方案设计；当前增量：I1（U7 账户事务、审计与只读打开）
+- 历史授权：用户 2026-10-12 批准账户方案 r2 新增（R13–R15、KTD11–14、U7），原授权终点为 PR 可合入；原记录中的用户合入分工已由 2026-10-14 的明确授权取代。
+- 当前授权：用户确认 #489/#488/#486 无其他活动写者，由当前智能体接管平台验证、三个任务试行、实际合入与 worktree 清理，全部合入由智能体执行。账户事务、审计、只读打开、凭据输入输出与 capabilities 属本任务范围；保护变更/改写历史仍由用户亲手执行，不操作 live 实例或共享数据库。
+- 交付模式：authorized-continuous，遵守 Dev main 调度记录 #518 的 manual 单窗口；最终同步、独立 Review、当前 HEAD CI 与实际合入均按固定对象核验。
+- 合入执行：当前智能体（用户 2026-10-14 明确授权）
+- 当前阶段：Backend 组件已交付，Dev 父仓待最终同步与组合验收；当前增量：I1（U7 账户事务、审计与只读打开）
 - 流程依据：仓库根目录 policy/delivery.md（归档后仍按仓库根目录定位）
-- 兄弟任务：feature/u8-sqlite-instance-guard 占用迁移 v28 时，本任务在 task-sync 后把审计迁移顺延到下一个版本号
+- 兄弟任务：feature/u8-sqlite-instance-guard 与后续 main 已占用迁移 v28–v30；Backend 组件采用增量迁移 v31，未改写已发布版本。
 
 ## 目标与非目标
 
@@ -39,7 +39,7 @@
 
 - 方案引用：账户方案 r2 U7；规格 docs/svc-deploy/u7-account-tx-audit.md（本分支）
 - 实施计划引用：统一事务助手、严格 INSERT、applyPasswordChange、审计列、账户运维打开模式、capabilities
-- 测试计划引用：T7-1–T7-5。PG 用例本地无 AGENT_PG_TEST_DSN 时记 NOT_RUN，GATE 为 Dev CI 的 test-backend-pg。「两个版本的真实更新」记 NOT_RUN
+- 测试计划引用：T7-1–T7-5。Backend 独立 PostgreSQL 交叠、双进程争用、SIGTERM/SIGKILL、本地 Go 全套及精确 HEAD GATE 已执行；Dev 父仓最终组合和 test-pg 仍须在同步后执行。「两个版本的真实更新」记 NOT_RUN。
 
 ## 阶段评审
 
@@ -82,19 +82,17 @@
 
 ## 规划进展与下一步
 
-- 本次推进/剩余：本卡交付 U7。随后是 RDM 导出缺口，再是 Documents 收口
-- 首选下一任务：RDM U5 导出缺口（D2/D3/D7 与审计页导出入口）
-- 推荐依据：2026-10-12 已批实施顺序 U8→U7→RDM
-- 前置条件/待确认：U8 先合入时，本分支 task-sync 并顺延迁移版本号
-- 预期产物/验收条件：Backend PR 与 Dev pin PR 可合入
+- 本次推进/剩余：Backend #185 已由当前智能体合入为 `8e80e2618eb7471dd12d5f172ff3cd23622b7d2f`；Dev #486 待领取 #518 的最终窗口、同步最新 main、固定组合、独立 Review、当前 HEAD CI、合入与安全回收。
+- 前置条件：Backend 组件实际合入已满足；Dev 目标窗口目前未领取，不复用旧 CI。
+- 预期产物/验收条件：Dev #486 固定已合入 Backend 和最新组件，实际 CI 与合入树可复核。
 - 重复任务核对：feature/u7-ops-drills 是协作存储演练，不是本任务
-- 启动授权：已由本会话授权到 PR 可合入；不自动启动 RDM 以外的新任务
+- 启动授权：2026-10-14 用户已明确授权完成本组三任务交付与回收；不扩大到 #537 等其他队列条目。
 
 ## 合入与清理
 
-- Review 记录：NOT_RUN（审阅智能体/平台身份、base/head、结论、问题闭合及重放依据）
+- Review 记录：Backend 组件独立 REPLAY `/root/merge_queue_review` 对 head `a4e33f192fbf5aa7ac6196b8ea1fcabc8832bd1d` / base `5d5fc9891c0eb8994545ccb8b740535d9b99fb0e` 复审 PASS、B1–B7 闭合（原始报告 `/tmp/mq-trial486-backend-independent-review-20261014-r2.json`）；Dev 父仓固定候选 Review 仍 NOT_RUN。
 - 冲突记录：NOT_RUN（最新目标同步、冲突处置、组合兼容核验及复审/补测）
-- CI 记录：NOT_RUN（当前 HEAD 完整 SHA、全部必需检查、运行链接、执行身份及 GATE 结果）
+- CI 记录：Backend 组件 GATE [run 3062](https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Backend/actions/runs/3062) / [job 4637](https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Backend/actions/runs/3062/jobs/4637) 对 head `a4e33f192fbf5aa7ac6196b8ea1fcabc8832bd1d` 完整成功；Dev 父仓当前 HEAD 必需 CI 仍 NOT_RUN。
 - 合入记录：NOT_RUN（交付授权范围、PR、被核验 HEAD、合入 SHA、目标分支及内容核验）
 - 清理记录：NOT_RUN（授权依据、写者退出确认、worktree/分支/任务卡处置）
 
@@ -136,3 +134,41 @@
 }
 ```
 | 同步前验收 | cd61bbb112eea6a210a64e84f2cef00b0d64bfc1 | 4a8997bf8b89b8e2f05710e09b824de4ff8a46d2 | 2026-10-12T15:50:29Z |
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-14T02:17:18.846829+00:00",
+  "command": "make precheck",
+  "command_sha256": "8fd03cdee8adbb8562846a1a114cc0623779a8654412cd20aac9b495e7eb0450",
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-u7-account-tx-audit",
+  "common_dir": "/home/weichen/projects/Agent-System-Dev/.git",
+  "before": {
+    "head": "5156d66302b3dcabd0a2306b1857d12ea4ec6a08",
+    "branch": "feature/u7-account-tx-audit",
+    "target_branch": "main",
+    "target_head": "add097d06137c4912a4ed9279e98ca353e4e4cf1",
+    "status": "",
+    "tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+    "untracked": {},
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+  "after_error": null,
+  "exit_code": 0,
+  "output": "make[1]: Entering directory '/home/weichen/projects/Agent-System-Dev-wt-feature-u7-account-tx-audit'\n[tool-source] Dev add097d06137c4912a4ed9279e98ca353e4e4cf1 immutable governance; task source HEAD is unchanged\n[repo]   branch=feature/u7-account-tx-audit head=5156d66302\n[remote] origin/main=add097d061 ahead=7 behind=376\n[tree]   clean submodules_drift=0 uninit=0\n[worktrees] linked=19\n[recycle] merged un-recycled branches: feature/card-close-20261012-054727Z feature/card-close-20261012-055452Z feature/card-close-20261012-062835Z feature/card-close-20261012-065217Z feature/card-close-20261012-095620Z feature/card-close-20261012-130704Z feature/card-close-20261012-133217Z feature/card-close-20261012-140049Z feature/card-close-20261012-150228Z feature/card-close-20261012-164920Z feature/card-close-20261012-static-pidcheck feature/card-close-20261013-021816Z feature/card-close-20261013-052211Z feature/card-close-20261013-065538Z feature/card-close-20261013-152849Z feature/card-close-20261013-153026Z feature/card-close-svc-d3-real-scenarios feature/card-close-u7-release-roadmap feature/card-close-u7-release-roadmap-record feature/d1-closeout-evidence feature/iam-i1-permission-boundaries feature/project-member-access feature/rdm-increment-acceptance-note feature/rdm-increment-release-plan feature/svc-d1-identity-flow feature/svc-d3-real-scenarios feature/svc-db-config-recover feature/svc-login-recovery-followup feature/sync-dhf-templates fix/genui-children-repair\n[cards] 闭合分支超过 24 小时未合入:feature/card-close-20261012-123313Z\n[hooks]   core.hooksPath=scripts/hooks（pre-commit/post-merge 实际接线）\n[facts]   policy/facts.md 4 条事实均在有效期内\n[required-reading] core/baseline.md, workflows/delivery.md §1, policy/delivery.md\n[target] add097d06137c4912a4ed9279e98ca353e4e4cf1（observed; task initial baseline is reported separately）\n[task-state] registered=/home/weichen/projects/Agent-System-Dev-wt-feature-u7-account-tx-audit initial_base=4d362537d0e8755a03b1757b5bad92779a064b33\n[verdict] LOCAL_READY — existing task may continue authorized local work; final delivery still requires latest-target sync and checks\nmake[1]: Leaving directory '/home/weichen/projects/Agent-System-Dev-wt-feature-u7-account-tx-audit'\n",
+  "output_sha256": "c79d660626a1b8322c73165b512c5cede0c89f6f2ca57ab5b1ad9cc235db36f8",
+  "receipt_sha256": "2e190f2eb62bbcc3580c37feddc41d1d208afb133f407b31a6508ebcd3f236d7"
+}
+```
diff --git a/modules/backend b/modules/backend
index 9754531c..8e80e261 160000
--- a/modules/backend
+++ b/modules/backend
@@ -1 +1 @@
-Subproject commit 9754531cc98393cb8a936d0e25a7526dfabbe2c4
+Subproject commit 8e80e2618eb7471dd12d5f172ff3cd23622b7d2f