HTExplicit · Oct 9, 2026 · Oct 9, 2026 · Oct 9, 2026 · Oct 9, 2026 · Oct 9, 2026
diff --git a/.downstream/native-domains.md b/.downstream/native-domains.md
@@ -33,6 +33,15 @@ no additional step-up. Legacy settings APIs use the same keys.
 setup-token accounts. GET computes effective identity through the forwarding
 selector, including credential shadows. PUT accepts only `mode`; bulk changes
 use ordinary account jobs with explicit frozen IDs and only that extra key.
+GET and the PUT response also include read-only `device_identity`,
+`effective_device` and `identifier_policy`. Saved/seed-derived device fields
+are separate from fields parsed from the selected UA; unparseable UA fields
+remain null, and disabled simulation has no effective client device. Identifier
+rules distinguish fixed values, request-derived handling and passthrough;
+request-dependent threads, parent references and window indexes are not
+invented from an empty request. Reads never persist identities or timestamps.
+The page loads full identities automatically, limits detail reads to three,
+rejects obsolete page/policy/mode responses, and retains unsaved mode drafts.
 General account edits preserve the latest stored mode when it is omitted.
 Existing seeds and persisted TUI identities are retained, and new accounts still
 default to `device`.

diff --git a/.github/workflows/backend-ci.yml b/.github/workflows/backend-ci.yml
@@ -39,7 +39,7 @@ jobs:
           cache-dependency-path: backend/go.sum
       - name: Verify Go version
         run: |
-          go version | grep -q 'go1.27.0'
+          go version | grep -q 'go1.27.2'
       - name: Verify Go modules
         working-directory: backend
         run: go mod verify
@@ -85,11 +85,11 @@ jobs:
           cache-dependency-path: backend/go.sum
       - name: Verify Go version
         run: |
-          go version | grep -q 'go1.27.0'
+          go version | grep -q 'go1.27.2'
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.13
+          version: v2.14.0
           args: --timeout=30m
           working-directory: backend
 

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
@@ -139,7 +139,7 @@ jobs:
           check-latest: false
           cache: false
       - name: Verify Go version
-        run: go version | grep -q 'go1.27.0'
+        run: go version | grep -q 'go1.27.2'
       - name: Restore target-specific Go cache
         id: go-cache
         uses: actions/cache/restore@v6

diff --git a/.github/workflows/security-scan.yml b/.github/workflows/security-scan.yml
@@ -26,7 +26,7 @@ jobs:
           cache-dependency-path: backend/go.sum
       - name: Verify Go version
         run: |
-          go version | grep -q 'go1.27.0'
+          go version | grep -q 'go1.27.2'
       - name: Run govulncheck
         working-directory: backend
         run: |

diff --git a/DEV_GUIDE.md b/DEV_GUIDE.md
@@ -53,7 +53,7 @@ npm install -g pnpm
 
 ### CI 要求
 
-- Go 版本必须是 **1.27.0**：三个 workflow 都用 `go-version-file: backend/go.mod` 取版本，随后硬断言 `go version | grep -q 'go1.27.0'`。升级 Go 时要同时改 `backend/go.mod`、`backend-ci.yml`（两处）、`release.yml`、`security-scan.yml` 里的这句断言，**以及三个 Dockerfile 里的 Go 构建镜像**（`Dockerfile` / `deploy/Dockerfile` 的 `ARG GOLANG_IMAGE`、`backend/Dockerfile` 的 `FROM golang:`）。前者漏了 CI 会在版本校验步骤直接失败；**后者漏了 CI 不会报，而是等到有人用这些 Dockerfile 构建时才失败**（`go.mod requires go >= X (running Y; GOTOOLCHAIN=local)`）。
+- Go 版本必须是 **1.27.2**：三个 workflow 都用 `go-version-file: backend/go.mod` 取版本，随后硬断言 `go version | grep -q 'go1.27.2'`。升级 Go 时要同时改 `backend/go.mod`、`backend-ci.yml`（两处）、`release.yml`、`security-scan.yml` 里的这句断言，**以及三个 Dockerfile 里的 Go 构建镜像**（`Dockerfile` / `deploy/Dockerfile` 的 `ARG GOLANG_IMAGE`、`backend/Dockerfile` 的 `FROM golang:`）。前者漏了 CI 会在版本校验步骤直接失败；**后者漏了 CI 不会报，而是等到有人用这些 Dockerfile 构建时才失败**（`go.mod requires go >= X (running Y; GOTOOLCHAIN=local)`）。
 - 前端使用 `pnpm install --frozen-lockfile`，必须提交 `pnpm-lock.yaml`
 
 ### 本地测试命令

diff --git a/Dockerfile b/Dockerfile
@@ -8,7 +8,7 @@
 # =============================================================================
 
 ARG NODE_IMAGE=node:24-alpine
-ARG GOLANG_IMAGE=golang:1.27.0-alpine
+ARG GOLANG_IMAGE=golang:1.27.2-alpine
 ARG ALPINE_IMAGE=alpine:3.21
 ARG POSTGRES_IMAGE=postgres:18-alpine
 ARG GOPROXY=https://goproxy.cn,direct

diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@
 
 # Sub2API
 
-[![Go](https://img.shields.io/badge/Go-1.27.0-00ADD8.svg)](https://golang.org/)
+[![Go](https://img.shields.io/badge/Go-1.27.2-00ADD8.svg)](https://golang.org/)
 [![Vue](https://img.shields.io/badge/Vue-3.4+-4FC08D.svg)](https://vuejs.org/)
 [![PostgreSQL](https://img.shields.io/badge/PostgreSQL-15+-336791.svg)](https://www.postgresql.org/)
 [![Redis](https://img.shields.io/badge/Redis-7+-DC382D.svg)](https://redis.io/)
@@ -200,7 +200,7 @@ Community projects that extend or integrate with Sub2API:
 
 | Component | Technology |
 |-----------|------------|
-| Backend | Go 1.27.0, Gin, Ent |
+| Backend | Go 1.27.2, Gin, Ent |
 | Frontend | Vue 3.4+, Vite 5+, TailwindCSS |
 | Database | PostgreSQL 15+ |
 | Cache/Queue | Redis 7+ |

diff --git a/README_CN.md b/README_CN.md
@@ -4,7 +4,7 @@
 
 # Sub2API
 
-[![Go](https://img.shields.io/badge/Go-1.27.0-00ADD8.svg)](https://golang.org/)
+[![Go](https://img.shields.io/badge/Go-1.27.2-00ADD8.svg)](https://golang.org/)
 [![Vue](https://img.shields.io/badge/Vue-3.4+-4FC08D.svg)](https://vuejs.org/)
 [![PostgreSQL](https://img.shields.io/badge/PostgreSQL-15+-336791.svg)](https://www.postgresql.org/)
 [![Redis](https://img.shields.io/badge/Redis-7+-DC382D.svg)](https://redis.io/)
@@ -202,7 +202,7 @@ Sub2API 是一个 AI API 网关平台，用于分发和管理 AI 产品订阅的
 
 | 组件 | 技术 |
 |------|------|
-| 后端 | Go 1.27.0, Gin, Ent |
+| 后端 | Go 1.27.2, Gin, Ent |
 | 前端 | Vue 3.4+, Vite 5+, TailwindCSS |
 | 数据库 | PostgreSQL 15+ |
 | 缓存/队列 | Redis 7+ |

diff --git a/README_JA.md b/README_JA.md
@@ -4,7 +4,7 @@
 
 # Sub2API
 
-[![Go](https://img.shields.io/badge/Go-1.27.0-00ADD8.svg)](https://golang.org/)
+[![Go](https://img.shields.io/badge/Go-1.27.2-00ADD8.svg)](https://golang.org/)
 [![Vue](https://img.shields.io/badge/Vue-3.4+-4FC08D.svg)](https://vuejs.org/)
 [![PostgreSQL](https://img.shields.io/badge/PostgreSQL-15+-336791.svg)](https://www.postgresql.org/)
 [![Redis](https://img.shields.io/badge/Redis-7+-DC382D.svg)](https://redis.io/)
@@ -201,7 +201,7 @@ Sub2API を拡張・統合するコミュニティプロジェクト:
 
 | コンポーネント | 技術 |
 |-----------|------------|
-| バックエンド | Go 1.27.0, Gin, Ent |
+| バックエンド | Go 1.27.2, Gin, Ent |
 | フロントエンド | Vue 3.4+, Vite 5+, TailwindCSS |
 | データベース | PostgreSQL 15+ |
 | キャッシュ/キュー | Redis 7+ |

diff --git a/backend/.golangci.yml b/backend/.golangci.yml
@@ -127,6 +127,20 @@ linters:
 
   exclusions:
     rules:
+      # x/net v0.60 marks the Go 1.27 HTTP/2 bridge deprecated. Keep these
+      # specific compatibility calls: migrating the independently configured
+      # H2C idle timeout or existing transport registration is outside this
+      # security patch. Only SA1019 on the listed symbols/paths is exempt;
+      # type checking, security checks and all other staticcheck diagnostics run.
+      - path: '^internal/repository/http_upstream(_http2_keepalive_test)?\.go$'
+        linters: [ staticcheck ]
+        text: '^SA1019: (golang\.org/x/net/http2\.(Transport|ConfigureTransports)|\(golang\.org/x/net/http2\.Transport\)\.(ReadIdleTimeout|PingTimeout)) is deprecated:'
+      - path: '^internal/server/http\.go$'
+        linters: [ staticcheck ]
+        text: '^SA1019: (golang\.org/x/net/http2\.(ConfigureServer|Server)|\(golang\.org/x/net/http2\.Server\)\.(MaxConcurrentStreams|IdleTimeout|MaxReadFrameSize|MaxUploadBufferPerConnection|MaxUploadBufferPerStream)) is deprecated:'
+      - path: '^internal/service/openai_codex_models_service(_test)?\.go$'
+        linters: [ staticcheck ]
+        text: '^SA1019: golang\.org/x/net/http2\.GoAwayError is deprecated:'
       # G703/G704 污点分析在测试文件中只会命中 httptest mock 与测试者自设的
       # 环境变量路径，不构成攻击面；且该分析跨环境结果不稳定（本地/CI 报告的
       # 位置集合不同），逐点 nolint 无法收敛，故按路径豁免。生产代码不豁免，

diff --git a/backend/Dockerfile b/backend/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.27.0-alpine
+FROM golang:1.27.2-alpine
 
 WORKDIR /app
 

diff --git a/backend/go.mod b/backend/go.mod
@@ -1,6 +1,6 @@
 module github.com/Wei-Shaw/sub2api
 
-go 1.27.0
+go 1.27.2
 
 require (
 	entgo.io/ent v0.14.5
@@ -51,13 +51,13 @@ require (
 	github.com/wechatpay-apiv3/wechatpay-go v0.2.21
 	github.com/zeromicro/go-zero v1.9.4
 	go.uber.org/zap v1.24.0
-	golang.org/x/crypto v0.55.0
+	golang.org/x/crypto v0.57.0
 	golang.org/x/image v0.41.0
-	golang.org/x/mod v0.38.0
-	golang.org/x/net v0.58.0
-	golang.org/x/sync v0.22.0
-	golang.org/x/term v0.45.0
-	golang.org/x/text v0.41.0
+	golang.org/x/mod v0.41.0
+	golang.org/x/net v0.60.0
+	golang.org/x/sync v0.23.0
+	golang.org/x/term v0.46.0
+	golang.org/x/text v0.42.0
 	google.golang.org/grpc v1.83.2
 	google.golang.org/protobuf v1.36.11
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
@@ -206,9 +206,9 @@ require (
 	go.uber.org/multierr v1.9.0 // indirect
 	golang.org/x/arch v0.3.0 // indirect
 	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
-	golang.org/x/sys v0.47.0 // indirect
+	golang.org/x/sys v0.48.0 // indirect
 	golang.org/x/time v0.12.0 // indirect
-	golang.org/x/tools v0.48.0 // indirect
+	golang.org/x/tools v0.50.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260526163538-3dc84a4a5aaa // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	modernc.org/libc v1.67.6 // indirect

diff --git a/backend/go.sum b/backend/go.sum
@@ -566,6 +566,8 @@ golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v
 golang.org/x/crypto v0.24.0/go.mod h1:Z1PMYSOR5nyMcyAVAIQSKCDwalqy85Aqn1x3Ws4L5DM=
 golang.org/x/crypto v0.55.0 h1:+KWHjbgOaAQ66dh/YlkZKHlz9ZUlq61AFirAR9ntP8M=
 golang.org/x/crypto v0.55.0/go.mod h1:uq0V9dE/fzQuJtbnL+2EhWOE63vo164FY8xqEnV9xis=
+golang.org/x/crypto v0.57.0 h1:3ZVCjf8Ggz7zneR/EHRVx68Ctf+2pmIMP2UFhh9cC6M=
+golang.org/x/crypto v0.57.0/go.mod h1:Fdz0i5U6CoizGwLda9DttjSk6qlZo25zYNtR+ycvuZA=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 h1:mgKeJMpvi0yx/sU5GsxQ7p6s2wtOnGAHZWCHUM4KGzY=
 golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546/go.mod h1:j/pmGrbnkbPtQfxEe5D0VQhZC6qKbfKifgD0oM7sR70=
@@ -582,6 +584,8 @@ golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/mod v0.38.0 h1:MECBjubtXD7yj4HrhIUcywNaGeNVUdfVnxmPajOk4yk=
 golang.org/x/mod v0.38.0/go.mod h1:V6Xz0pq8TQ3dGqVQ1FVHuelZpAL0uNhSkk9ogYP3c40=
+golang.org/x/mod v0.41.0 h1:qJmnOUb4YB+FsEuM3HcWucdZASCPGhsX6uljO6pog0c=
+golang.org/x/mod v0.41.0/go.mod h1:Ek9pY8RKWXwsWvd3rQiHYtMqkjSUV+s1Rj7j4H5Ur6o=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -605,6 +609,8 @@ golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
 golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
 golang.org/x/net v0.58.0 h1:ynWG7rqYi4ccpTEuPZ2QGWHktVEM9DMCj9yzDE0Q7To=
 golang.org/x/net v0.58.0/go.mod h1:YwCddHnFlT7eLQqVprV19OnhLGtc5xOKgE0RyqgfWAU=
+golang.org/x/net v0.60.0 h1:79p50tfZlm0J9YfoDsSi639qSXNGVwEzOPLCxM2FsYU=
+golang.org/x/net v0.60.0/go.mod h1:2DA/G1UfVbCpQPeWTmMPGY7Cs2PkBkwu743bVX5PIVg=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -618,6 +624,8 @@ golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.22.0 h1:SZjpbeLmrCk4xhRSZFNZW5gFUeCeFgjekvI/+gfScek=
 golang.org/x/sync v0.22.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/sync v0.23.0 h1:KameEIfc1IkluZyXWLn39Wd4tURc6GbCiISGiZm2bQk=
+golang.org/x/sync v0.23.0/go.mod h1:sUUOizhqBxiL6pEWpqNLUiaJn1ShEbZ6BBqskPbjZm0=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -651,9 +659,13 @@ golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
 golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/sys v0.48.0 h1:bbX/i/6MgT9BVLM9RT1thmxL04yeTAhbEz4SyadbXoo=
+golang.org/x/sys v0.48.0/go.mod h1:hNLxWAXmnKAxqDtdwIYC4bM9oQPEecfsnNMuSxOs3og=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/telemetry v0.0.0-20260708182218-49f421fb7959 h1:RJhm5l6Fo4rmEIcndxDllNhhf/fAx8qIm4t6A7vpm2A=
 golang.org/x/telemetry v0.0.0-20260708182218-49f421fb7959/go.mod h1:LV7u5Oco+Z/g6XI7PqN+EUUUGGkEcmB1uj2ceI0fOVg=
+golang.org/x/telemetry v0.0.0-20260811182544-a038080d80e5 h1:ZUSxONxc981v7AW7QUg+I9WwZzSTTJ019ENBYr5pV/Q=
+golang.org/x/telemetry v0.0.0-20260908163034-4bcc4b2ee518 h1:F5BWKvW126NXR74uxkxuc1jQHhm/rwm/J3rSiFyuRs4=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
@@ -667,6 +679,8 @@ golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/term v0.21.0/go.mod h1:ooXLefLobQVslOqselCNF4SxFAaoS6KujMbsGzSDmX0=
 golang.org/x/term v0.45.0 h1:NwWyBmoJCbfTHpxrWoZ9C6/VxOf7ic219I8xZZFdrf0=
 golang.org/x/term v0.45.0/go.mod h1:9aqxs0blBcrm/n0L9QW0aRVD+ktan8ssZromtqJC43w=
+golang.org/x/term v0.46.0 h1:3+OXuTbaKDgwk8jTi3aSLHRlmWqHEUDUtxnbFigO4YE=
+golang.org/x/term v0.46.0/go.mod h1:+K02xbkittuwc0Am4abfA3Fc+XRGXkvBXNO88NCXPoc=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -679,6 +693,8 @@ golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI=
 golang.org/x/text v0.41.0 h1:vz/seA0lnX87Othu2f/0L24RcgrXD9/YFTSuGjj3rH8=
 golang.org/x/text v0.41.0/go.mod h1:jvf1O8ajNzZqhSrQBPbutR/EB83Cc0CFrezNQIwbb5M=
+golang.org/x/text v0.42.0 h1:JbOZXgfeCPU9gacVtYliJqOhD+zhrEqK4LfdpmlUZqI=
+golang.org/x/text v0.42.0/go.mod h1:ojzP1Z+2QtioaF8DTtO8K5q7JWVVYwZKenzujK0Zd0E=
 golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
 golang.org/x/time v0.12.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -695,6 +711,10 @@ golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
 golang.org/x/tools v0.48.0 h1:3+hClM1aLL5mjMKm5ovokw9epgRXPuu2tILgismM6RE=
 golang.org/x/tools v0.48.0/go.mod h1:08xX0orndb/F7jJxGDicx061tyd5pcMto75YMAXr6lk=
+golang.org/x/tools v0.49.0 h1:3NI7VXzL9+1WZD52Dx2ttoPwD5DWrFGpl9mFZDlmisI=
+golang.org/x/tools v0.49.0/go.mod h1:SJNXV9DBKT0UbdttsQjbfJlAE/q+y36++zo3uL3N0Oo=
+golang.org/x/tools v0.50.0 h1:c2ifzfcuY7L90lZ2aKd8S4K2NpASF08SZx9ZuJkHmSU=
+golang.org/x/tools v0.50.0/go.mod h1:7ulVMw3831Mwi5EZD6RomGyffr4VFjuNYXf2BbCEAV0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

diff --git a/backend/internal/handler/admin/codex_fingerprint_handler_test.go b/backend/internal/handler/admin/codex_fingerprint_handler_test.go
@@ -51,12 +51,17 @@ func TestCodexFingerprintAccountHandlerOnlyChangesModeAndUsesParentIdentity(t *t
 	read := call(http.MethodGet, "")
 	require.Equal(t, http.StatusOK, read.Code)
 	require.Equal(t, int64(1), gjson.Get(read.Body.String(), "data.identity.identity_account_id").Int())
+	require.NotEmpty(t, gjson.Get(read.Body.String(), "data.device_identity.os_type").String())
+	require.False(t, gjson.Get(read.Body.String(), "data.identity.identity_persisted").Bool())
+	require.Empty(t, gjson.Get(read.Body.String(), "data.device_identity.generated_at").String())
+	require.True(t, gjson.Get(read.Body.String(), "data.identifier_policy").Exists())
+	require.Nil(t, admin.updates, "GET must not write derived identities")
 	saved := call(http.MethodPut, `{"mode":"off"}`)
 	require.Equal(t, http.StatusOK, saved.Code)
 	require.Equal(t, map[string]any{"codex_fingerprint_mode": "off"}, admin.updates)
 	require.Equal(t, "value", shadow.Extra["preserved"])
 	require.Equal(t, "device", parent.Extra["codex_fingerprint_mode"])
-	for _, body := range []string{`{"mode":"invalid"}`, `{"mode":"full","codex_fingerprint_seed":"injected"}`, `{"mode":null}`} {
+	for _, body := range []string{`{"mode":"invalid"}`, `{"mode":"full","codex_fingerprint_seed":"injected"}`, `{"mode":"full","device_identity":{"os_type":"Windows"}}`, `{"mode":null}`} {
 		rejected := call(http.MethodPut, body)
 		require.Equal(t, http.StatusBadRequest, rejected.Code)
 		require.Equal(t, "off", shadow.Extra["codex_fingerprint_mode"])

diff --git a/backend/internal/repository/http_upstream.go b/backend/internal/repository/http_upstream.go
@@ -1466,16 +1466,23 @@ func isOpenAIUpstreamProtocolMode(mode string) bool {
 // Go 默认惰性配置 http2 且 ReadIdleTimeout=0（不发健康 PING），无法检测被代理/NAT
 // 静默掐断的死连接。此处主动设置 ReadIdleTimeout/PingTimeout，让死连接被提前 PING
 // 出并关闭，请求得以重建连接而非挂到 TCP 重传超时。返回底层 *http2.Transport 便于测试。
+//
+//lint:ignore SA1019 Retain the configured x/net transport handle to preserve existing pool and proxy behavior.
 func enableHTTP2KeepAlive(transport *http.Transport, protocolMode string) (*http2.Transport, error) {
+	//lint:ignore SA1019 Keep the existing transport registration; this release only patches its security dependencies.
 	h2, err := http2.ConfigureTransports(transport)
 	if err != nil {
 		return nil, err
 	}
 	if h2 != nil {
+		//lint:ignore SA1019 Preserve the existing long-stream health-check configuration on the compatibility handle.
 		h2.ReadIdleTimeout = longStreamHTTP2ReadIdleTimeout
+		//lint:ignore SA1019 Preserve the separate long-stream PING response deadline.
 		h2.PingTimeout = longStreamHTTP2PingTimeout
 		if protocolMode == upstreamProtocolModeOpenAIH2 {
+			//lint:ignore SA1019 Preserve the existing OpenAI health-check configuration on the compatibility handle.
 			h2.ReadIdleTimeout = openAIHTTP2ReadIdleTimeout
+			//lint:ignore SA1019 Preserve the separate OpenAI PING response deadline.
 			h2.PingTimeout = openAIHTTP2PingTimeout
 		}
 	}

diff --git a/backend/internal/repository/http_upstream_http2_keepalive_test.go b/backend/internal/repository/http_upstream_http2_keepalive_test.go
@@ -52,7 +52,9 @@ func TestEnableHTTP2KeepAlive_EnablesPingHealthCheck(t *testing.T) {
 			h2, err := enableHTTP2KeepAlive(tr, tc.mode)
 			require.NoError(t, err)
 			require.NotNil(t, h2, "必须返回已配置的 *http2.Transport")
+			//lint:ignore SA1019 Assert the preserved compatibility-handle health-check contract.
 			require.Equal(t, tc.readIdleTimeout, h2.ReadIdleTimeout)
+			//lint:ignore SA1019 Assert the preserved independent PING response deadline.
 			require.Equal(t, tc.pingTimeout, h2.PingTimeout, "各模式应使用独立的 PING 应答期限")
 			requireHTTP2Configured(t, tr, "http2 必须已挂到底层 http.Transport 上")
 		})