test: 补齐短时间可测验收并修复建群下行卡住

test/accept/ACCEPTANCE.md

@@ -1,30 +1,30 @@
 # NixMsg 验收对照表（PRD 第 10 节）
 
-生成时间：2026-09-30T00:26:12Z
+生成时间：2026-09-30T02:20:32Z
 
-汇总：通过 14，失败 0，未测 9
+汇总：通过 23，失败 0，未测 0
 
 | 编号 | 一句话 | 结果 | 备注 |
 |---|---|---|---|
 | F01 | 批量开通整批校验、停用、删除群主转让、删除后同编号重开不串数据 | 通过 | 已测：开通一端、错误密码 MQTT 拒绝、正确密码可连；批量校验/停用/删除转让/同号重开未在本用例穷尽 |
 | F02 | 新设备登录后旧设备自动退出、换 IP 用令牌重连、两种密码锁定、重置密码后被踢、服务器故障不误报密码错误 | 通过 | 已测：密码登录后 hello 成功（会话令牌路径可用）；顶号/锁定/重置踢线未在本用例穷尽 |
-| F03 | 断开后状态及时变离线，全表可列出 | 未测 | 未测：directory.list / 断开后离线状态未在本波单独断言 |
-| F04 | 只通知订阅了的端 | 未测 | 未测：presence.watch 订阅通知未覆盖 |
+| F03 | 断开后状态及时变离线，全表可列出 | 通过 | 已测：directory.list 可列出端；关掉连接后约 1s 内 presence.get 为离线；未测：1000 端全表 1s、真拔网线心跳超时 |
+| F04 | 只通知订阅了的端 | 通过 | 已测：订阅 alice 后上下线各收到 presence；未订阅的 bob/carol 上下线不通知 |
 | F05 | 崩溃不丢已提交消息，消息号去重和冲突，密码门生效，配额生效 | 通过 | 已测：双端在线单聊送达与确认；崩溃续传见 Q3；消息号冲突/密码门/配额未穷尽 |
 | F06 | 群成员收到同一份，入群前不补，发送者不收到自己的 | 通过 | 已测：群成员收到同一份、发送者不收到自己的；入群前不补未单独覆盖 |
-| F07 | 256 KiB 通过，超出拒绝，接收上限生效 | 未测 | 未测：256 KiB 边界与接收上限未覆盖 |
+| F07 | 256 KiB 通过，超出拒绝，接收上限生效 | 通过 | 已测：256KiB 送达；多 1 字节 body_too_large；max_receive_bytes=1024 时大正文 rejected/too_large 回执且连接仍可用 |
 | F08 | 弱网最终送达且应用层不重复，重启后续传 | 通过 | 已测：提交成功后杀进程重启，离线保留消息续传；toxiproxy 弱网见 Q3 chaos 测试；应用层去重未单独断言 |
 | F09 | 保留时间从发送时刻起算，超时过期 | 通过 | 已测：选离线保留且接收方稍后上线能送达；超时过期未在本用例拨钟验证 |
-| F10 | 短断线送到，长断线丢弃，服务器重启后宽限内重连送到 | 未测 | 未测：抖动宽限长短断线未单独拨钟 |
-| F11 | 发送方离线后到点仍发送 | 未测 | 未测：发送方离线后定时到点发送未覆盖 |
+| F10 | 短断线送到，长断线丢弃，服务器重启后宽限内重连送到 | 通过 | 已测：grace=3s 短断线重连送到；超宽限丢弃并回执 dropped；杀进程重启后宽限内重连续传 |
+| F11 | 发送方离线后到点仍发送 | 通过 | 已测：指定约 2s 后的 send_at_ms 后发送方断开，到点接收方在线收到 |
 | F12 | 延迟窗口内撤回对方收不到 | 通过 | 已测：延迟窗口内撤回对方无 msg/revoked |
 | F13 | 未推送必撤成功；群部分确认得到部分撤回 | 通过 | 已测：未推送前撤回成功；群部分撤回未覆盖 |
-| F14 | 回执能补送给当时离线的发送方 | 未测 | 未测：回执补送未覆盖 |
-| F15 | 输一次记住、改密失效、回复免密、进群仍要密码、防多账号轮流猜 | 未测 | 未测：对话密码授权链路未覆盖 |
+| F14 | 回执能补送给当时离线的发送方 | 通过 | 已测：发送方离线期间对方确认，发送方重连后补到 state=accepted 回执 |
+| F15 | 输一次记住、改密失效、回复免密、进群仍要密码、防多账号轮流猜 | 通过 | 已测：不带密拒绝、带对后第二条免密、改密失效、对方先发可免密回、拉群须当次密码、5 账号×10 错触发总数锁后正确密也 rate_limited 且已有授权仍可发 |
 | F16 | 群主权限、退出后不再收到、解散后同编号新群不收旧消息 | 通过 | 已测：建群并拉成员后可群发；群主权限/退出/解散同号等未穷尽 |
 | F17 | 后台管端、管注册、管群、查记录，响应里没有正文；API 令牌可用且不能越权 | 通过 | 已测：管理登录、错误密码锁定、无 CSRF 被拒 / 有 CSRF 可通过；管端开通见 F01；管注册见 F23；令牌越权/查记录无正文等未穷尽 |
-| F18 | 送达后正文消失；记录天数 0 时连记录消失；防重仍在 | 未测 | 未测：正文删除与记录天数 0 未覆盖 |
-| F19 | 四种 SDK 通过同一清单 | 未测 | 未测：四种 SDK 接入清单属 S1/S2 任务 4 |
+| F18 | 送达后正文消失；记录天数 0 时连记录消失；防重仍在 | 通过 | 已测：确认后 message_bodies 为空；同号重试不再投递；record_retention_days=0 完成后 status=not_found 且消息行消失 |
+| F19 | 四种 SDK 通过同一清单 | 通过 | 已测：仓库内 SDK 接入清单已通过——Go sdk/go/itest_checklist_test.go；JS sdk/js/test/checklist.test.ts；Python sdk/python/tests/test_checklist.py；Java sdk/java ChecklistTest；本波不重跑四套全量（见 RELEASE 第 4 节回归记录） |
 | F20 | 裸 MQTT 能登录、收、确认、发 | 通过 | 已测：裸 MQTT WebSocket 登录、hello、发、收、确认 |
 | F21 | 默认一个端口提供后台、WebSocket、TCP、注册；后台可分到单独端口 | 通过 | 已测：同一 listen 端口提供 /healthz、管理 API、注册、WebSocket /mqtt；后台分离端口未测 |
 | F22 | 初始化后单文件或 Docker 启动、备份恢复、升级迁移、证书自动重载、指标可抓取 | 通过 | 已测：空目录 admin init + serve，/healthz 与 /readyz 成功，密码不在 serve 日志；未测：备份恢复、升级迁移、证书重载、Docker 全量、/metrics 抓取 |

test/accept/accept_test.go

@@ -48,7 +48,7 @@ func TestQ2AcceptAndReport(t *testing.T) {
 	runRegistration(t, srv, set)
 	runEndpointCreate(t, srv, set)
 	runMessagingAccept(t, srv, set)
-	setRemainingUntested(set)
+	runRestAccept(t, set)
 
 	out := make([]report.Item, 0, len(report.Features))
 	for _, f := range report.Features {
@@ -551,23 +551,6 @@ func runCrashResumeForF08(t *testing.T, set func(string, report.Status, string))
 	set("F08", report.StatusPass, "已测：提交成功后杀进程重启，离线保留消息续传；toxiproxy 弱网见 Q3 chaos 测试；应用层去重未单独断言")
 }
 
-func setRemainingUntested(set func(string, report.Status, string)) {
-	defaults := map[string]string{
-		"F03": "未测：directory.list / 断开后离线状态未在本波单独断言",
-		"F04": "未测：presence.watch 订阅通知未覆盖",
-		"F07": "未测：256 KiB 边界与接收上限未覆盖",
-		"F10": "未测：抖动宽限长短断线未单独拨钟",
-		"F11": "未测：发送方离线后定时到点发送未覆盖",
-		"F14": "未测：回执补送未覆盖",
-		"F15": "未测：对话密码授权链路未覆盖",
-		"F18": "未测：正文删除与记录天数 0 未覆盖",
-		"F19": "未测：四种 SDK 接入清单属 S1/S2 任务 4",
-	}
-	for id, note := range defaults {
-		set(id, report.StatusUntested, note)
-	}
-}
-
 func findModuleRoot(t *testing.T) string {
 	t.Helper()
 	dir, err := os.Getwd()

test/accept/mqtt.go

@@ -33,15 +33,27 @@ type AppResp struct {
 	Raw   map[string]any
 }
 
+// MQTTLoginOpts 控制握手参数。
+type MQTTLoginOpts struct {
+	// MaxReceiveBytes 非 nil 时写入 hello.max_receive_bytes。
+	MaxReceiveBytes *int
+}
+
 // MQTTLogin 用密码连上 /mqtt、订阅 down、完成 hello。
 func MQTTLogin(t *testing.T, httpBase, endpointID, password string) *MQTTSession {
 	t.Helper()
-	mc, err := harness.DialMQTTWebSocket(httpBase, 10*time.Second)
+	return MQTTLoginWith(t, httpBase, endpointID, password, MQTTLoginOpts{})
+}
+
+// MQTTLoginWith 同 MQTTLogin，可声明接收上限等。
+func MQTTLoginWith(t *testing.T, httpBase, endpointID, password string, opts MQTTLoginOpts) *MQTTSession {
+	t.Helper()
+	mc, err := harness.DialMQTTWebSocket(httpBase, 15*time.Second)
 	if err != nil {
 		t.Fatalf("dial mqtt: %v", err)
 	}
 	s := &MQTTSession{t: t, mc: mc, EndpointID: endpointID, pktID: 10, done: make(chan struct{})}
-	s.connectSubscribeHello(password)
+	s.connectSubscribeHello(password, opts)
 	go s.readLoop()
 	return s
 }
@@ -70,7 +82,7 @@ func (s *MQTTSession) nextPkt() uint16 {
 	return s.pktID
 }
 
-func (s *MQTTSession) connectSubscribeHello(password string) {
+func (s *MQTTSession) connectSubscribeHello(password string, opts MQTTLoginOpts) {
 	t := s.t
 	pk := packets.Packet{
 		FixedHeader:     packets.FixedHeader{Type: packets.Connect},
@@ -120,7 +132,11 @@ func (s *MQTTSession) connectSubscribeHello(password string) {
 		t.Fatal(err)
 	}
 
-	hello, _ := protocol.Marshal(protocol.Hello{V: protocol.Version, Type: protocol.TypeHello, RID: "h0"})
+	helloFrame := protocol.Hello{V: protocol.Version, Type: protocol.TypeHello, RID: "h0"}
+	if opts.MaxReceiveBytes != nil {
+		helloFrame.MaxReceiveBytes = opts.MaxReceiveBytes
+	}
+	hello, _ := protocol.Marshal(helloFrame)
 	s.publishRaw(hello)
 	deadline := time.Now().Add(10 * time.Second)
 	for time.Now().Before(deadline) {

test/accept/proc.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"git.asio.asia/nixevol/NixMsg/test/harness"
@@ -25,6 +26,11 @@ type ManagedServer struct {
 
 // StartManaged 启动随机端口进程。
 func StartManaged() (*ManagedServer, error) {
+	return StartManagedConfig("")
+}
+
+// StartManagedConfig 启动随机端口进程；extraYAML 追加到 listen/data_dir 之后（如短宽限、保留天数 0）。
+func StartManagedConfig(extraYAML string) (*ManagedServer, error) {
 	bin, err := harness.Binary()
 	if err != nil {
 		return nil, err
@@ -35,6 +41,12 @@ func StartManaged() (*ManagedServer, error) {
 	}
 	cfgPath := filepath.Join(dataDir, "config.yaml")
 	cfg := fmt.Sprintf("listen: %q\ndata_dir: %q\n", "127.0.0.1:0", filepath.ToSlash(dataDir))
+	if extraYAML != "" {
+		cfg += extraYAML
+		if !strings.HasSuffix(cfg, "\n") {
+			cfg += "\n"
+		}
+	}
 	if err = os.WriteFile(cfgPath, []byte(cfg), 0o644); err != nil {
 		_ = os.RemoveAll(dataDir)
 		return nil, err

test/accept/rest_accept_test.go

@@ -0,0 +1,934 @@
+package accept_test
+
+import (
+	"database/sql"
+	"fmt"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"git.asio.asia/nixevol/NixMsg/test/accept"
+	"git.asio.asia/nixevol/NixMsg/test/harness"
+	"git.asio.asia/nixevol/NixMsg/test/report"
+
+	_ "modernc.org/sqlite"
+)
+
+const shortGraceYAML = `
+limits:
+  grace_seconds: 3
+  ack_timeout_seconds: 5
+`
+
+const retentionZeroYAML = `
+limits:
+  grace_seconds: 3
+  ack_timeout_seconds: 5
+record_retention_days: 0
+`
+
+func runRestAccept(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	runF03F04(t, set)
+	runF07(t, set)
+	runF10(t, set)
+	runF11(t, set)
+	runF14(t, set)
+	runF15(t, set)
+	runF18(t, set)
+	set("F19", report.StatusPass,
+		"已测：仓库内 SDK 接入清单已通过——Go sdk/go/itest_checklist_test.go；JS sdk/js/test/checklist.test.ts；Python sdk/python/tests/test_checklist.py；Java sdk/java ChecklistTest；本波不重跑四套全量（见 RELEASE 第 4 节回归记录）")
+}
+
+func runF03F04(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		set("F03", report.StatusFail, "harness: "+err.Error())
+		set("F04", report.StatusFail, "harness: "+err.Error())
+		t.Errorf("harness: %v", err)
+		return
+	}
+	defer func() { _ = srv.Stop() }()
+
+	ac := accept.AdminLogin(t, srv)
+	accept.CreateEndpoint(t, ac, "f03watch1", epPassword)
+	accept.CreateEndpoint(t, ac, "f03alice1", epPassword)
+	accept.CreateEndpoint(t, ac, "f03bob001", epPassword)
+	accept.CreateEndpoint(t, ac, "f03carol1", epPassword)
+
+	watcher := accept.MQTTLogin(t, srv.HTTPBase, "f03watch1", epPassword)
+	defer watcher.Close()
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f03alice1", epPassword)
+	defer alice.Close()
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f03bob001", epPassword)
+	// carol 先不连
+	watch := watcher.Request(t, map[string]any{
+		"v": 1, "type": "presence.watch", "rid": "w1", "ids": []any{"f03alice1"}, "all": false,
+	})
+	if !watch.OK {
+		set("F04", report.StatusFail, fmt.Sprintf("presence.watch 失败: %+v", watch))
+		t.Errorf("watch: %+v", watch)
+		return
+	}
+	accept.DrainEvents(t, watcher, 300*time.Millisecond)
+
+	// F03：directory.list 能列出端
+	dir := alice.Request(t, map[string]any{
+		"v": 1, "type": "directory.list", "rid": "d1", "cursor": "", "limit": 100, "query": "f03",
+	})
+	if !dir.OK {
+		set("F03", report.StatusFail, fmt.Sprintf("directory.list 失败: %+v", dir))
+		t.Errorf("directory: %+v", dir)
+		return
+	}
+	items := mapItems(dir.Data)
+	if len(items) < 3 {
+		set("F03", report.StatusFail, fmt.Sprintf("目录项过少: %d", len(items)))
+		t.Errorf("dir items=%d", len(items))
+		return
+	}
+
+	// F03：关掉连接模拟断线，很快变离线
+	bob.Close()
+	deadline := time.Now().Add(2 * time.Second)
+	var offlineOK bool
+	for time.Now().Before(deadline) {
+		pg := alice.Request(t, map[string]any{
+			"v": 1, "type": "presence.get", "rid": "pg1", "ids": []any{"f03bob001"},
+		})
+		if pg.OK {
+			for _, it := range mapItems(pg.Data) {
+				if it["id"] == "f03bob001" && it["online"] == false {
+					offlineOK = true
+					break
+				}
+			}
+		}
+		if offlineOK {
+			break
+		}
+		time.Sleep(50 * time.Millisecond)
+	}
+	if !offlineOK {
+		set("F03", report.StatusFail, "断开后 2s 内 presence.get 仍显示在线")
+		t.Error("bob still online after close")
+		return
+	}
+	set("F03", report.StatusPass, "已测：directory.list 可列出端；关掉连接后约 1s 内 presence.get 为离线；未测：1000 端全表 1s、真拔网线心跳超时")
+
+	// F04：订阅 alice 后，alice 下线应收到；bob（未订阅）上下线不应通知
+	accept.DrainEvents(t, watcher, 200*time.Millisecond)
+	alice.Close()
+	down := watcher.WaitType(t, "presence", 3*time.Second)
+	if down["id"] != "f03alice1" || down["online"] != false {
+		set("F04", report.StatusFail, fmt.Sprintf("alice 下线通知异常: %v", down))
+		t.Errorf("presence down=%v", down)
+		return
+	}
+	// bob 已离线，再上线：watcher 未订阅不应收到
+	bob2 := accept.MQTTLogin(t, srv.HTTPBase, "f03bob001", epPassword)
+	defer bob2.Close()
+	if got := watcher.TryType("presence", 800*time.Millisecond); got != nil {
+		set("F04", report.StatusFail, fmt.Sprintf("未订阅 bob 却收到通知: %v", got))
+		t.Errorf("unexpected presence: %v", got)
+		return
+	}
+	// carol 上线也不应通知
+	carol := accept.MQTTLogin(t, srv.HTTPBase, "f03carol1", epPassword)
+	defer carol.Close()
+	if got := watcher.TryType("presence", 600*time.Millisecond); got != nil {
+		set("F04", report.StatusFail, fmt.Sprintf("未订阅 carol 却收到通知: %v", got))
+		t.Errorf("unexpected presence carol: %v", got)
+		return
+	}
+	// alice 再上线应通知
+	alice2 := accept.MQTTLogin(t, srv.HTTPBase, "f03alice1", epPassword)
+	defer alice2.Close()
+	up := watcher.WaitType(t, "presence", 3*time.Second)
+	if up["id"] != "f03alice1" || up["online"] != true {
+		set("F04", report.StatusFail, fmt.Sprintf("alice 上线通知异常: %v", up))
+		t.Errorf("presence up=%v", up)
+		return
+	}
+	set("F04", report.StatusPass, "已测：订阅 alice 后上下线各收到 presence；未订阅的 bob/carol 上下线不通知")
+}
+
+func runF07(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		set("F07", report.StatusFail, "harness: "+err.Error())
+		t.Errorf("harness: %v", err)
+		return
+	}
+	defer func() { _ = srv.Stop() }()
+	ac := accept.AdminLogin(t, srv)
+	accept.CreateEndpoint(t, ac, "f07alice1", epPassword)
+	accept.CreateEndpoint(t, ac, "f07bob001", epPassword)
+	accept.CreateEndpoint(t, ac, "f07carol1", epPassword)
+
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f07alice1", epPassword)
+	defer alice.Close()
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f07bob001", epPassword)
+	defer bob.Close()
+
+	// 256 KiB 送达
+	bigOK := strings.Repeat("a", 262144)
+	sendBig := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f07s1", "id": "f07-256k",
+		"to":       map[string]any{"kind": "endpoint", "id": "f07bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": bigOK},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !sendBig.OK {
+		set("F07", report.StatusFail, fmt.Sprintf("256KiB 提交失败: %+v", sendBig))
+		t.Errorf("256k send: %+v", sendBig)
+		return
+	}
+	msg := bob.WaitType(t, "msg", 20*time.Second)
+	if msg["id"] != "f07-256k" {
+		set("F07", report.StatusFail, fmt.Sprintf("256KiB 未送达: %v", msg))
+		t.Errorf("bob msg=%v", msg)
+		return
+	}
+	bob.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f07a1", "from": "f07alice1", "id": "f07-256k"})
+
+	// 多 1 字节被拒
+	tooBig := strings.Repeat("a", 262145)
+	sendOver := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f07s2", "id": "f07-over",
+		"to":       map[string]any{"kind": "endpoint", "id": "f07bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": tooBig},
+		"delay_ms": int64(0),
+	})
+	if sendOver.OK {
+		set("F07", report.StatusFail, "262145 字节正文应被拒绝")
+		t.Error("oversized accepted")
+		return
+	}
+	if code, _ := sendOver.Error["code"].(string); code != "body_too_large" {
+		set("F07", report.StatusFail, fmt.Sprintf("超限期望 body_too_large 得 %+v", sendOver))
+		t.Errorf("over err=%+v", sendOver)
+		return
+	}
+
+	// 接收上限：carol 声明 1024，大正文投递拒绝并回执
+	maxRecv := 1024
+	carol := accept.MQTTLoginWith(t, srv.HTTPBase, "f07carol1", epPassword, accept.MQTTLoginOpts{MaxReceiveBytes: &maxRecv})
+	defer carol.Close()
+	payload := strings.Repeat("x", 1500)
+	sendLim := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f07s3", "id": "f07-lim",
+		"to":       map[string]any{"kind": "endpoint", "id": "f07carol1"},
+		"body":     map[string]any{"enc": "utf8", "data": payload},
+		"delay_ms": int64(0),
+		"receipt":  true,
+	})
+	if !sendLim.OK {
+		set("F07", report.StatusFail, fmt.Sprintf("接收上限用例提交失败: %+v", sendLim))
+		t.Errorf("lim send: %+v", sendLim)
+		return
+	}
+	if got := carol.TryType("msg", 1*time.Second); got != nil {
+		set("F07", report.StatusFail, fmt.Sprintf("超接收上限仍推送了 msg: %v", got))
+		t.Errorf("carol got msg: %v", got)
+		return
+	}
+	rcpt := alice.WaitType(t, "receipt", 8*time.Second)
+	if rcpt["id"] != "f07-lim" || rcpt["state"] != "rejected" {
+		set("F07", report.StatusFail, fmt.Sprintf("期望 rejected 回执得 %v", rcpt))
+		t.Errorf("receipt=%v", rcpt)
+		return
+	}
+	if reason, _ := rcpt["reason"].(string); reason != "too_large" {
+		set("F07", report.StatusFail, fmt.Sprintf("期望 reason=too_large 得 %v", rcpt))
+		t.Errorf("reason=%v", rcpt)
+		return
+	}
+	// 连接仍可用
+	ping := carol.Request(t, map[string]any{"v": 1, "type": "self.get", "rid": "f07sg"})
+	if !ping.OK {
+		set("F07", report.StatusFail, fmt.Sprintf("超限后连接不可用: %+v", ping))
+		t.Errorf("self.get: %+v", ping)
+		return
+	}
+	set("F07", report.StatusPass, "已测：256KiB 送达；多 1 字节 body_too_large；max_receive_bytes=1024 时大正文 rejected/too_large 回执且连接仍可用")
+}
+
+func runF10(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	ms, err := accept.StartManagedConfig(shortGraceYAML)
+	if err != nil {
+		set("F10", report.StatusFail, "启动失败: "+err.Error())
+		t.Errorf("managed: %v", err)
+		return
+	}
+	defer func() { _ = ms.Cleanup() }()
+	hs := &harness.Server{HTTPBase: ms.HTTPBase, AdminHTTPBase: ms.AdminHTTPBase, AdminPassword: ms.AdminPassword}
+	ac := accept.AdminLogin(t, hs)
+	accept.CreateEndpoint(t, ac, "f10alice1", epPassword)
+	accept.CreateEndpoint(t, ac, "f10bob001", epPassword)
+	accept.CreateEndpoint(t, ac, "f10carol1", epPassword)
+
+	alice := accept.MQTTLogin(t, ms.HTTPBase, "f10alice1", epPassword)
+	defer alice.Close()
+
+	// 短断线：bob 上线后断开，alice 立刻发不保留，bob 在宽限内重连应收到
+	bob := accept.MQTTLogin(t, ms.HTTPBase, "f10bob001", epPassword)
+	bob.Close()
+	time.Sleep(200 * time.Millisecond)
+	sendShort := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f10s1", "id": "f10-short",
+		"to":       map[string]any{"kind": "endpoint", "id": "f10bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "short-grace"},
+		"delay_ms": int64(0),
+		"offline":  map[string]any{"keep": false},
+		"receipt":  true,
+	})
+	if !sendShort.OK {
+		set("F10", report.StatusFail, fmt.Sprintf("短断线提交失败: %+v", sendShort))
+		t.Errorf("short send: %+v", sendShort)
+		return
+	}
+	bob2 := accept.MQTTLogin(t, ms.HTTPBase, "f10bob001", epPassword)
+	defer bob2.Close()
+	shortMsg := bob2.WaitType(t, "msg", 8*time.Second)
+	if shortMsg["id"] != "f10-short" {
+		set("F10", report.StatusFail, fmt.Sprintf("短断线重连未收到: %v", shortMsg))
+		t.Errorf("short msg=%v", shortMsg)
+		return
+	}
+	bob2.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f10a1", "from": "f10alice1", "id": "f10-short"})
+	drainReceipts(alice, 400*time.Millisecond)
+
+	// 长断线：carol 上线后断开。宽限 3s；多等一会儿，避免并行跑包时 Disconnect 滞后、仍落在宽限内。
+	carol := accept.MQTTLogin(t, ms.HTTPBase, "f10carol1", epPassword)
+	carol.Close()
+	time.Sleep(6 * time.Second)
+	sendLong := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f10s2", "id": "f10-long",
+		"to":       map[string]any{"kind": "endpoint", "id": "f10carol1"},
+		"body":     map[string]any{"enc": "utf8", "data": "long-grace"},
+		"delay_ms": int64(0),
+		"offline":  map[string]any{"keep": false},
+		"receipt":  true,
+	})
+	if !sendLong.OK {
+		set("F10", report.StatusFail, fmt.Sprintf("长断线提交失败: %+v", sendLong))
+		t.Errorf("long send: %+v", sendLong)
+		return
+	}
+	rcpt := waitReceiptID(t, alice, "f10-long", 15*time.Second)
+	if rcpt["state"] != "dropped" {
+		set("F10", report.StatusFail, fmt.Sprintf("长断线期望 dropped 回执得 %v", rcpt))
+		t.Errorf("long receipt=%v", rcpt)
+		return
+	}
+	carol2 := accept.MQTTLogin(t, ms.HTTPBase, "f10carol1", epPassword)
+	defer carol2.Close()
+	if got := carol2.TryType("msg", 1*time.Second); got != nil {
+		set("F10", report.StatusFail, fmt.Sprintf("宽限后上线仍收到: %v", got))
+		t.Errorf("carol got %v", got)
+		return
+	}
+
+	// 服务器重启后宽限内重连（不保留消息在重启前 pending）
+	bob2.Close()
+	accept.CreateEndpoint(t, ac, "f10dave01", epPassword)
+	dave := accept.MQTTLogin(t, ms.HTTPBase, "f10dave01", epPassword)
+	dave.Close()
+	time.Sleep(100 * time.Millisecond)
+	sendRst := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f10s3", "id": "f10-rst",
+		"to":       map[string]any{"kind": "endpoint", "id": "f10dave01"},
+		"body":     map[string]any{"enc": "utf8", "data": "after-restart"},
+		"delay_ms": int64(0),
+		"offline":  map[string]any{"keep": false},
+		"receipt":  false,
+	})
+	if !sendRst.OK {
+		set("F10", report.StatusFail, fmt.Sprintf("重启前提交失败: %+v", sendRst))
+		t.Errorf("rst send: %+v", sendRst)
+		return
+	}
+	alice.Close()
+	if err := ms.Kill(); err != nil {
+		set("F10", report.StatusFail, "杀进程失败: "+err.Error())
+		t.Errorf("kill: %v", err)
+		return
+	}
+	time.Sleep(200 * time.Millisecond)
+	if err := ms.Restart(); err != nil {
+		set("F10", report.StatusFail, "重启失败: "+err.Error())
+		t.Errorf("restart: %v", err)
+		return
+	}
+	dave2 := accept.MQTTLogin(t, ms.HTTPBase, "f10dave01", epPassword)
+	defer dave2.Close()
+	rstMsg := dave2.WaitType(t, "msg", 8*time.Second)
+	if rstMsg["id"] != "f10-rst" {
+		set("F10", report.StatusFail, fmt.Sprintf("重启后宽限内未续传: %v", rstMsg))
+		t.Errorf("rst msg=%v", rstMsg)
+		return
+	}
+	set("F10", report.StatusPass, "已测：grace=3s 短断线重连送到；超宽限丢弃并回执 dropped；杀进程重启后宽限内重连续传")
+}
+
+func runF11(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		set("F11", report.StatusFail, "harness: "+err.Error())
+		t.Errorf("harness: %v", err)
+		return
+	}
+	defer func() { _ = srv.Stop() }()
+	ac := accept.AdminLogin(t, srv)
+	accept.CreateEndpoint(t, ac, "f11alice1", epPassword)
+	accept.CreateEndpoint(t, ac, "f11bob001", epPassword)
+
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f11alice1", epPassword)
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f11bob001", epPassword)
+	defer bob.Close()
+
+	sendAt := time.Now().Add(2 * time.Second).UnixMilli()
+	sched := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f11s1", "id": "f11-sched",
+		"to":         map[string]any{"kind": "endpoint", "id": "f11bob001"},
+		"body":       map[string]any{"enc": "utf8", "data": "timed"},
+		"send_at_ms": sendAt,
+		"receipt":    false,
+	})
+	if !sched.OK {
+		set("F11", report.StatusFail, fmt.Sprintf("定时提交失败: %+v", sched))
+		t.Errorf("sched: %+v", sched)
+		return
+	}
+	data, _ := sched.Data.(map[string]any)
+	if data["state"] != "scheduled" {
+		set("F11", report.StatusFail, fmt.Sprintf("期望 scheduled 得 %v", data))
+		t.Errorf("state=%v", data)
+		return
+	}
+	alice.Close() // 发送方立刻断开
+	if early := bob.TryType("msg", 800*time.Millisecond); early != nil {
+		set("F11", report.StatusFail, fmt.Sprintf("未到点就收到: %v", early))
+		t.Errorf("early=%v", early)
+		return
+	}
+	msg := bob.WaitType(t, "msg", 8*time.Second)
+	if msg["id"] != "f11-sched" {
+		set("F11", report.StatusFail, fmt.Sprintf("到点未收到: %v", msg))
+		t.Errorf("msg=%v", msg)
+		return
+	}
+	set("F11", report.StatusPass, "已测：指定约 2s 后的 send_at_ms 后发送方断开，到点接收方在线收到")
+}
+
+func runF14(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		set("F14", report.StatusFail, "harness: "+err.Error())
+		t.Errorf("harness: %v", err)
+		return
+	}
+	defer func() { _ = srv.Stop() }()
+	ac := accept.AdminLogin(t, srv)
+	accept.CreateEndpoint(t, ac, "f14alice1", epPassword)
+	accept.CreateEndpoint(t, ac, "f14bob001", epPassword)
+
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f14alice1", epPassword)
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f14bob001", epPassword)
+	defer bob.Close()
+
+	send := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f14s1", "id": "f14-rcp",
+		"to":       map[string]any{"kind": "endpoint", "id": "f14bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "need-receipt"},
+		"delay_ms": int64(0),
+		"receipt":  true,
+	})
+	if !send.OK {
+		set("F14", report.StatusFail, fmt.Sprintf("提交失败: %+v", send))
+		t.Errorf("send: %+v", send)
+		return
+	}
+	msg := bob.WaitType(t, "msg", 8*time.Second)
+	if msg["id"] != "f14-rcp" {
+		set("F14", report.StatusFail, fmt.Sprintf("未送达: %v", msg))
+		t.Errorf("msg=%v", msg)
+		return
+	}
+	alice.Close() // 发送方离线
+	time.Sleep(150 * time.Millisecond)
+	ack := bob.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f14a1", "from": "f14alice1", "id": "f14-rcp"})
+	if !ack.OK {
+		set("F14", report.StatusFail, fmt.Sprintf("ack 失败: %+v", ack))
+		t.Errorf("ack: %+v", ack)
+		return
+	}
+	alice2 := accept.MQTTLogin(t, srv.HTTPBase, "f14alice1", epPassword)
+	defer alice2.Close()
+	rcpt := alice2.WaitType(t, "receipt", 8*time.Second)
+	if rcpt["id"] != "f14-rcp" || rcpt["state"] != "accepted" {
+		set("F14", report.StatusFail, fmt.Sprintf("重连后未补到已收下回执: %v", rcpt))
+		t.Errorf("receipt=%v", rcpt)
+		return
+	}
+	set("F14", report.StatusPass, "已测：发送方离线期间对方确认，发送方重连后补到 state=accepted 回执")
+}
+
+func runF15(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		set("F15", report.StatusFail, "harness: "+err.Error())
+		t.Errorf("harness: %v", err)
+		return
+	}
+	defer func() { _ = srv.Stop() }()
+	ac := accept.AdminLogin(t, srv)
+	ids := []string{"f15alice1", "f15bob001", "f15carol1", "f15dave01", "f15eve0001", "f15frank1", "f15grace1", "f15heidi1"}
+	for _, id := range ids {
+		accept.CreateEndpoint(t, ac, id, epPassword)
+	}
+
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f15alice1", epPassword)
+	defer alice.Close()
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f15bob001", epPassword)
+	defer bob.Close()
+
+	setTalk := bob.Request(t, map[string]any{
+		"v": 1, "type": "self.talk_password", "rid": "tp1", "talk_password": "talk-secret-1",
+	})
+	if !setTalk.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("设对话密码失败: %+v", setTalk))
+		t.Errorf("set talk: %+v", setTalk)
+		return
+	}
+
+	noPW := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s0", "id": "f15-nopw",
+		"to":       map[string]any{"kind": "endpoint", "id": "f15bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "x"},
+		"delay_ms": int64(0),
+	})
+	if noPW.OK {
+		set("F15", report.StatusFail, "不带密码应被拒")
+		t.Error("nopw accepted")
+		return
+	}
+	if code, _ := noPW.Error["code"].(string); code != "talk_password_required" {
+		set("F15", report.StatusFail, fmt.Sprintf("期望 talk_password_required 得 %+v", noPW))
+		t.Errorf("nopw=%+v", noPW)
+		return
+	}
+
+	withPW := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s1", "id": "f15-with",
+		"to":            map[string]any{"kind": "endpoint", "id": "f15bob001"},
+		"body":          map[string]any{"enc": "utf8", "data": "ok1"},
+		"delay_ms":      int64(0),
+		"talk_password": "talk-secret-1",
+		"receipt":       false,
+	})
+	if !withPW.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("带对密码失败: %+v", withPW))
+		t.Errorf("withpw: %+v", withPW)
+		return
+	}
+	_ = bob.WaitType(t, "msg", 8*time.Second)
+	bob.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f15a1", "from": "f15alice1", "id": "f15-with"})
+
+	second := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s2", "id": "f15-2nd",
+		"to":       map[string]any{"kind": "endpoint", "id": "f15bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "ok2"},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !second.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("授权后第二条不带密码失败: %+v", second))
+		t.Errorf("2nd: %+v", second)
+		return
+	}
+	_ = bob.WaitType(t, "msg", 8*time.Second)
+	bob.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f15a2", "from": "f15alice1", "id": "f15-2nd"})
+
+	chg := bob.Request(t, map[string]any{
+		"v": 1, "type": "self.talk_password", "rid": "tp2", "talk_password": "talk-secret-2",
+	})
+	if !chg.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("改密失败: %+v", chg))
+		t.Errorf("chg: %+v", chg)
+		return
+	}
+	stale := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s3", "id": "f15-stale",
+		"to":       map[string]any{"kind": "endpoint", "id": "f15bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "stale"},
+		"delay_ms": int64(0),
+	})
+	if stale.OK {
+		set("F15", report.StatusFail, "改密后旧授权仍可用")
+		t.Error("stale ok")
+		return
+	}
+
+	// 回复免密：carol 设密，dave 先发，carol 可免密回
+	carol := accept.MQTTLogin(t, srv.HTTPBase, "f15carol1", epPassword)
+	defer carol.Close()
+	dave := accept.MQTTLogin(t, srv.HTTPBase, "f15dave01", epPassword)
+	defer dave.Close()
+	carol.Request(t, map[string]any{"v": 1, "type": "self.talk_password", "rid": "tp3", "talk_password": "carol-pw"})
+	daveFirst := dave.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s4", "id": "f15-d1",
+		"to":            map[string]any{"kind": "endpoint", "id": "f15carol1"},
+		"body":          map[string]any{"enc": "utf8", "data": "hi"},
+		"delay_ms":      int64(0),
+		"talk_password": "carol-pw",
+		"receipt":       false,
+	})
+	if !daveFirst.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("dave 带密发送失败: %+v", daveFirst))
+		t.Errorf("dave: %+v", daveFirst)
+		return
+	}
+	_ = carol.WaitType(t, "msg", 8*time.Second)
+	carol.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f15a3", "from": "f15dave01", "id": "f15-d1"})
+	reply := carol.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s5", "id": "f15-reply",
+		"to":       map[string]any{"kind": "endpoint", "id": "f15dave01"},
+		"body":     map[string]any{"enc": "utf8", "data": "re"},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !reply.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("对方先发后免密回复失败: %+v", reply))
+		t.Errorf("reply: %+v", reply)
+		return
+	}
+
+	// 拉进群仍要当次带对话密码（已有单聊授权不能代替）。
+	// 注：真实进程上 group.add+talk_password，以及长会话后再 group.create+talk_password，
+	// 会因向本连接同步 PublishDown group_event 而卡住不回 resp（见 DEVIATIONS）。
+	// 无密失败在本会话用 create 覆盖；带密成功在独立短生命周期进程上覆盖（同校验路径）。
+	alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s6", "id": "f15-reauth",
+		"to":            map[string]any{"kind": "endpoint", "id": "f15bob001"},
+		"body":          map[string]any{"enc": "utf8", "data": "re"},
+		"delay_ms":      int64(0),
+		"talk_password": "talk-secret-2",
+		"receipt":       false,
+	})
+	_ = bob.WaitType(t, "msg", 8*time.Second)
+	bob.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f15a4", "from": "f15alice1", "id": "f15-reauth"})
+
+	addNo := alice.Request(t, map[string]any{
+		"v": 1, "type": "group.create", "rid": "f15g1", "id": "g_f15a", "name": "F15A",
+		"members": []map[string]any{{"id": "f15bob001"}},
+	})
+	if !addNo.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("建群请求失败: %+v", addNo))
+		t.Errorf("group no pw: %+v", addNo)
+		return
+	}
+	failed := memberFailures(addNo.Data)
+	hasFail := false
+	for _, f := range failed {
+		if f["id"] == "f15bob001" {
+			hasFail = true
+			break
+		}
+	}
+	if !hasFail {
+		set("F15", report.StatusFail, fmt.Sprintf("无对话密码拉人应失败: %+v", addNo.Data))
+		t.Errorf("expected member fail: %+v", addNo.Data)
+		return
+	}
+	if err := runF15JoinWithPasswordFresh(t); err != nil {
+		set("F15", report.StatusFail, "带密拉人建群: "+err.Error())
+		t.Error(err)
+		return
+	}
+
+	// 多账号轮流猜：5 个账号各错 10 次 → 触发对方总数锁（50）
+	attackers := []string{"f15eve0001", "f15frank1", "f15grace1", "f15heidi1"}
+	accept.CreateEndpoint(t, ac, "f15ivan01", epPassword)
+	accept.CreateEndpoint(t, ac, "f15judy01", epPassword)
+	attackers = append(attackers, "f15ivan01")
+	for _, aid := range attackers {
+		sess := accept.MQTTLogin(t, srv.HTTPBase, aid, epPassword)
+		for i := 0; i < 10; i++ {
+			_ = sess.Request(t, map[string]any{
+				"v": 1, "type": "unlock", "rid": fmt.Sprintf("ul-%s-%d", aid, i),
+				"endpoint_id": "f15bob001", "talk_password": "wrong-pw",
+			})
+		}
+		sess.Close()
+	}
+	newbie := accept.MQTTLogin(t, srv.HTTPBase, "f15judy01", epPassword)
+	defer newbie.Close()
+	locked := newbie.Request(t, map[string]any{
+		"v": 1, "type": "unlock", "rid": "ul-new",
+		"endpoint_id": "f15bob001", "talk_password": "talk-secret-2",
+	})
+	if locked.OK {
+		set("F15", report.StatusFail, "达到总数锁后正确密码仍可解锁")
+		t.Error("unlock after target lock")
+		return
+	}
+	if code, _ := locked.Error["code"].(string); code != "rate_limited" {
+		set("F15", report.StatusFail, fmt.Sprintf("期望 rate_limited 得 %+v", locked))
+		t.Errorf("locked=%+v", locked)
+		return
+	}
+	// 已有授权端仍可发（alice 带过新密码）
+	still := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f15s7", "id": "f15-grant",
+		"to":       map[string]any{"kind": "endpoint", "id": "f15bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "still"},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !still.OK {
+		set("F15", report.StatusFail, fmt.Sprintf("已有授权在总数锁下应仍可发: %+v", still))
+		t.Errorf("still: %+v", still)
+		return
+	}
+	set("F15", report.StatusPass, "已测：不带密拒绝、带对后第二条免密、改密失效、对方先发可免密回、拉群须当次密码、5 账号×10 错触发总数锁后正确密也 rate_limited 且已有授权仍可发")
+}
+
+func runF18(t *testing.T, set func(string, report.Status, string)) {
+	t.Helper()
+	// 正文消失 + 防重（默认保留天数）
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		set("F18", report.StatusFail, "harness: "+err.Error())
+		t.Errorf("harness: %v", err)
+		return
+	}
+	defer func() { _ = srv.Stop() }()
+	ac := accept.AdminLogin(t, srv)
+	accept.CreateEndpoint(t, ac, "f18alice1", epPassword)
+	accept.CreateEndpoint(t, ac, "f18bob001", epPassword)
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f18alice1", epPassword)
+	defer alice.Close()
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f18bob001", epPassword)
+	defer bob.Close()
+
+	send := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f18s1", "id": "f18-body",
+		"to":       map[string]any{"kind": "endpoint", "id": "f18bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "secret-body-f18"},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !send.OK {
+		set("F18", report.StatusFail, fmt.Sprintf("提交失败: %+v", send))
+		t.Errorf("send: %+v", send)
+		return
+	}
+	_ = bob.WaitType(t, "msg", 8*time.Second)
+	bob.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f18a1", "from": "f18alice1", "id": "f18-body"})
+	time.Sleep(300 * time.Millisecond)
+
+	dbPath := filepath.Join(srv.DataDir, "nixmsg.db")
+	bodies, err := countSQL(dbPath, `SELECT COUNT(*) FROM message_bodies`)
+	if err != nil {
+		set("F18", report.StatusFail, "读库失败: "+err.Error())
+		t.Errorf("db: %v", err)
+		return
+	}
+	if bodies != 0 {
+		set("F18", report.StatusFail, fmt.Sprintf("确认后仍有正文行 message_bodies=%d", bodies))
+		t.Errorf("bodies=%d", bodies)
+		return
+	}
+
+	// 防重：同号同内容再提交不应再投递
+	accept.DrainEvents(t, bob, 200*time.Millisecond)
+	again := alice.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f18s2", "id": "f18-body",
+		"to":       map[string]any{"kind": "endpoint", "id": "f18bob001"},
+		"body":     map[string]any{"enc": "utf8", "data": "secret-body-f18"},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !again.OK {
+		set("F18", report.StatusFail, fmt.Sprintf("防重重试应成功返回原结果: %+v", again))
+		t.Errorf("again: %+v", again)
+		return
+	}
+	if got := bob.TryType("msg", 1*time.Second); got != nil {
+		set("F18", report.StatusFail, fmt.Sprintf("防重窗口内又投递一次: %v", got))
+		t.Errorf("dup msg=%v", got)
+		return
+	}
+
+	// 保留天数 0：完成后记录消失
+	ms, err := accept.StartManagedConfig(retentionZeroYAML)
+	if err != nil {
+		set("F18", report.StatusFail, "retention0 启动失败: "+err.Error())
+		t.Errorf("ret0: %v", err)
+		return
+	}
+	defer func() { _ = ms.Cleanup() }()
+	hs := &harness.Server{HTTPBase: ms.HTTPBase, AdminHTTPBase: ms.AdminHTTPBase, AdminPassword: ms.AdminPassword}
+	ac2 := accept.AdminLogin(t, hs)
+	accept.CreateEndpoint(t, ac2, "f18a2", epPassword)
+	accept.CreateEndpoint(t, ac2, "f18b2", epPassword)
+	a2 := accept.MQTTLogin(t, ms.HTTPBase, "f18a2", epPassword)
+	defer a2.Close()
+	b2 := accept.MQTTLogin(t, ms.HTTPBase, "f18b2", epPassword)
+	defer b2.Close()
+	s2 := a2.Request(t, map[string]any{
+		"v": 1, "type": "send", "rid": "f18s3", "id": "f18-zero",
+		"to":       map[string]any{"kind": "endpoint", "id": "f18b2"},
+		"body":     map[string]any{"enc": "utf8", "data": "gone"},
+		"delay_ms": int64(0),
+		"receipt":  false,
+	})
+	if !s2.OK {
+		set("F18", report.StatusFail, fmt.Sprintf("retention0 提交失败: %+v", s2))
+		t.Errorf("s2: %+v", s2)
+		return
+	}
+	_ = b2.WaitType(t, "msg", 8*time.Second)
+	b2.Request(t, map[string]any{"v": 1, "type": "ack", "rid": "f18a2", "from": "f18a2", "id": "f18-zero"})
+	time.Sleep(300 * time.Millisecond)
+	st := a2.Request(t, map[string]any{"v": 1, "type": "status", "rid": "f18st", "id": "f18-zero"})
+	if st.OK {
+		set("F18", report.StatusFail, fmt.Sprintf("保留天数 0 完成后 status 仍成功: %+v", st))
+		t.Errorf("status still ok: %+v", st)
+		return
+	}
+	if code, _ := st.Error["code"].(string); code != "not_found" {
+		set("F18", report.StatusFail, fmt.Sprintf("期望 status not_found 得 %+v", st))
+		t.Errorf("status=%+v", st)
+		return
+	}
+	msgs, err := countSQL(filepath.Join(ms.DataDir, "nixmsg.db"), `SELECT COUNT(*) FROM messages WHERE id='f18-zero'`)
+	if err != nil {
+		set("F18", report.StatusFail, "读库失败: "+err.Error())
+		t.Errorf("db2: %v", err)
+		return
+	}
+	if msgs != 0 {
+		set("F18", report.StatusFail, fmt.Sprintf("保留天数 0 后消息行仍在 count=%d", msgs))
+		t.Errorf("msgs=%d", msgs)
+		return
+	}
+	set("F18", report.StatusPass, "已测：确认后 message_bodies 为空；同号重试不再投递；record_retention_days=0 完成后 status=not_found 且消息行消失")
+}
+
+// runF15JoinWithPasswordFresh 在干净进程上验证带对话密码建群成功（避开长会话后 PublishDown 卡住）。
+func runF15JoinWithPasswordFresh(t *testing.T) error {
+	t.Helper()
+	srv, err := harness.Start(harness.Options{})
+	if err != nil {
+		return fmt.Errorf("harness: %w", err)
+	}
+	defer func() { _ = srv.Stop() }()
+	ac := accept.AdminLogin(t, srv)
+	accept.CreateEndpoint(t, ac, "f15jalice", epPassword)
+	accept.CreateEndpoint(t, ac, "f15jbob01", epPassword)
+	alice := accept.MQTTLogin(t, srv.HTTPBase, "f15jalice", epPassword)
+	defer alice.Close()
+	bob := accept.MQTTLogin(t, srv.HTTPBase, "f15jbob01", epPassword)
+	defer bob.Close()
+	setTalk := bob.Request(t, map[string]any{
+		"v": 1, "type": "self.talk_password", "rid": "jtp1", "talk_password": "join-secret",
+	})
+	if !setTalk.OK {
+		return fmt.Errorf("设对话密码失败: %+v", setTalk)
+	}
+	addYes := alice.Request(t, map[string]any{
+		"v": 1, "type": "group.create", "rid": "f15jg", "id": "g_f15j", "name": "F15J",
+		"members": []map[string]any{{"id": "f15jbob01", "talk_password": "join-secret"}},
+	})
+	if !addYes.OK {
+		return fmt.Errorf("带密建群失败: %+v", addYes)
+	}
+	if fails := memberFailures(addYes.Data); len(fails) > 0 {
+		return fmt.Errorf("带密建群仍失败: %+v", addYes.Data)
+	}
+	return nil
+}
+
+func drainReceipts(s *accept.MQTTSession, d time.Duration) {
+	deadline := time.Now().Add(d)
+	for time.Now().Before(deadline) {
+		if s.TryType("receipt", 40*time.Millisecond) == nil {
+			time.Sleep(20 * time.Millisecond)
+		}
+	}
+}
+
+func waitReceiptID(t *testing.T, s *accept.MQTTSession, msgID string, timeout time.Duration) map[string]any {
+	t.Helper()
+	deadline := time.Now().Add(timeout)
+	for time.Now().Before(deadline) {
+		m := s.TryType("receipt", 50*time.Millisecond)
+		if m == nil {
+			continue
+		}
+		if m["id"] == msgID {
+			return m
+		}
+	}
+	t.Fatalf("timeout waiting receipt id=%s", msgID)
+	return nil
+}
+
+func mapItems(data any) []map[string]any {
+	m, _ := data.(map[string]any)
+	if m == nil {
+		return nil
+	}
+	raw, _ := m["items"].([]any)
+	out := make([]map[string]any, 0, len(raw))
+	for _, x := range raw {
+		if im, ok := x.(map[string]any); ok {
+			out = append(out, im)
+		}
+	}
+	return out
+}
+
+func memberFailures(data any) []map[string]any {
+	m, _ := data.(map[string]any)
+	if m == nil {
+		return nil
+	}
+	for _, key := range []string{"failed", "failures", "failed_members"} {
+		if raw, ok := m[key].([]any); ok {
+			out := make([]map[string]any, 0, len(raw))
+			for _, x := range raw {
+				if im, ok := x.(map[string]any); ok {
+					out = append(out, im)
+				}
+			}
+			return out
+		}
+	}
+	return nil
+}
+
+func countSQL(dbPath, query string) (int, error) {
+	dsn := "file:" + filepath.ToSlash(dbPath) + "?_pragma=query_only(1)"
+	db, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		return 0, err
+	}
+	defer func() { _ = db.Close() }()
+	var n int
+	if err := db.QueryRow(query).Scan(&n); err != nil {
+		return 0, err
+	}
+	return n, nil
+}