feat: notify when managed browsers exit

cmd/chub/main.go

@@ -112,6 +112,8 @@ func runWindow(logger *slog.Logger) {
 	cdp := browser.NewCDPInspector()
 	externalProfiles := browser.NewWindowsProfileInspector()
 	proxies := newProxyDirectory()
+	exitMonitor := newManagedExitMonitor(shell.ReportManagedExit, window.Invalidate)
+	defer exitMonitor.Close()
 	shell.OnStartInstance(instanceStarter{
 		launcher:         launcher,
 		resolver:         discoverer,
@@ -120,8 +122,9 @@ func runWindow(logger *slog.Logger) {
 		remoteDebug:      cdp,
 		portAllocator:    cdp,
 		proxyResolver:    proxies,
+		monitor:          exitMonitor,
 	}.Start, window.Invalidate)
-	shell.OnStopInstance(instanceStopper{launcher: launcher, managedProfiles: launcher}.Stop, window.Invalidate)
+	shell.OnStopInstance(instanceStopper{launcher: launcher, managedProfiles: launcher, monitor: exitMonitor}.Stop, window.Invalidate)
 	shell.OnRefreshInstances(instanceStatusRefresher{
 		managedProfiles:  launcher,
 		externalProfiles: externalProfiles,
@@ -274,11 +277,12 @@ type profileStopper interface {
 type instanceStopper struct {
 	launcher        profileStopper
 	managedProfiles managedProfileInspector
+	monitor         managedExitObserver
 	waitTimeout     time.Duration
 	waitInterval    time.Duration
 }
 
-func (s instanceStopper) Stop(ctx context.Context, row ui.InstanceRow) error {
+func (s instanceStopper) Stop(ctx context.Context, row ui.InstanceRow, launchGeneration uint64) error {
 	if row.Status != "运行中" && row.Status != "运行中（调试不可用）" {
 		return errors.New("实例当前不是可停止的 Chub 托管状态")
 	}
@@ -298,7 +302,14 @@ func (s instanceStopper) Stop(ctx context.Context, row ui.InstanceRow) error {
 	if use.Source != "chub_registry" || (row.PID > 0 && use.PID > 0 && row.PID != use.PID) {
 		return domain.ErrIdentityMismatch
 	}
+	expected := false
+	if s.monitor != nil {
+		expected = s.monitor.ExpectStop(row.ID, launchGeneration, row.PID)
+	}
 	if err := s.launcher.StopProfile(ctx, row.UserDataDir, false); err != nil {
+		if expected {
+			s.monitor.ClearExpectedStop(row.ID, launchGeneration, row.PID)
+		}
 		return err
 	}
 	timeout := s.waitTimeout
@@ -342,6 +353,7 @@ type instanceStarter struct {
 	remoteDebug      browser.RemoteDebugEndpointInspector
 	portAllocator    browser.RemoteDebugPortAllocator
 	proxyResolver    proxyServerResolver
+	monitor          managedExitObserver
 }
 
 type instanceStatusRefresher struct {
@@ -428,7 +440,7 @@ func (s instanceStatusRefresher) refreshOne(ctx context.Context, row ui.Instance
 	return result
 }
 
-func (s instanceStarter) Start(ctx context.Context, row ui.InstanceRow, settings ui.SettingsState) (ui.InstanceStartOutcome, error) {
+func (s instanceStarter) Start(ctx context.Context, row ui.InstanceRow, settings ui.SettingsState, launchGeneration uint64) (ui.InstanceStartOutcome, error) {
 	kind, err := browserKind(row.Browser)
 	if err != nil {
 		return ui.InstanceStartOutcome{}, err
@@ -496,6 +508,9 @@ func (s instanceStarter) Start(ctx context.Context, row ui.InstanceRow, settings
 	if err != nil {
 		return ui.InstanceStartOutcome{}, err
 	}
+	if s.monitor != nil {
+		s.monitor.Watch(row.ID, launchGeneration, handle)
+	}
 	endpointCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
 	defer cancel()
 	endpoint, endpointErr := s.remoteDebug.WaitForRemoteDebugPort(endpointCtx, kind, port)

cmd/chub/main_test.go

@@ -26,7 +26,7 @@ func TestInstanceStarterBuildsLaunchSpecFromInstanceAndSettings(t *testing.T) {
 	resolver := &fakeExecutableResolver{path: `C:\Browser\msedge.exe`}
 	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9666}, inspectErr: browser.ErrRemoteDebugEndpointUnavailable}
 	starter := instanceStarter{launcher: launcher, resolver: resolver, managedProfiles: fakeManagedProfileInspector{}, externalProfiles: fakeExternalProfileInspector{}, remoteDebug: remote, portAllocator: remote}
-	outcome, err := starter.Start(context.Background(), ui.InstanceRow{ID: "edge-a", Browser: "Edge", UserDataDir: `C:\profiles\edge-a`}, ui.SettingsState{EdgePath: `C:\Configured\msedge.exe`, RemoteDebugStartPort: 9666})
+	outcome, err := starter.Start(context.Background(), ui.InstanceRow{ID: "edge-a", Browser: "Edge", UserDataDir: `C:\profiles\edge-a`}, ui.SettingsState{EdgePath: `C:\Configured\msedge.exe`, RemoteDebugStartPort: 9666}, 1)
 	if err != nil || outcome.PID != 4242 || outcome.RemoteDebugPort != 9666 {
 		t.Fatalf("Start() = %#v, %v", outcome, err)
 	}
@@ -45,33 +45,74 @@ func TestInstanceStarterResolvesSelectedProxyAtLaunch(t *testing.T) {
 	proxies := newProxyDirectory()
 	proxies.Set([]config.ProxyProfile{{ID: "proxy-sg", Name: "SG", Server: "http://127.0.0.1:8080"}})
 	starter := instanceStarter{launcher: launcher, resolver: resolver, managedProfiles: fakeManagedProfileInspector{}, externalProfiles: fakeExternalProfileInspector{}, remoteDebug: remote, portAllocator: remote, proxyResolver: proxies}
-	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`, ProxyID: "proxy-sg"}, ui.SettingsState{RemoteDebugStartPort: 9666})
+	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`, ProxyID: "proxy-sg"}, ui.SettingsState{RemoteDebugStartPort: 9666}, 1)
 	if err != nil || launcher.spec.ProxyServer != "http://127.0.0.1:8080" {
 		t.Fatalf("proxy launch spec = %#v, error = %v", launcher.spec, err)
 	}
-	_, err = starter.Start(context.Background(), ui.InstanceRow{ID: "missing", Browser: "Chrome", UserDataDir: `C:\profiles\missing`, ProxyID: "gone"}, ui.SettingsState{RemoteDebugStartPort: 9666})
+	_, err = starter.Start(context.Background(), ui.InstanceRow{ID: "missing", Browser: "Chrome", UserDataDir: `C:\profiles\missing`, ProxyID: "gone"}, ui.SettingsState{RemoteDebugStartPort: 9666}, 2)
 	if err == nil || launcher.calls != 1 {
 		t.Fatalf("missing proxy error = %v, launch calls = %d", err, launcher.calls)
 	}
 }
 
+func TestInstanceStarterRegistersOnlyLaunchedProcessWithExitMonitor(t *testing.T) {
+	launcher := &fakeProcessLauncher{handle: fakeProcessHandle{pid: 4242}}
+	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9666}, inspectErr: browser.ErrRemoteDebugEndpointUnavailable}
+	monitor := &fakeManagedExitObserver{}
+	starter := instanceStarter{launcher: launcher, resolver: &fakeExecutableResolver{path: `C:\Browser\chrome.exe`}, managedProfiles: fakeManagedProfileInspector{}, externalProfiles: fakeExternalProfileInspector{}, remoteDebug: remote, portAllocator: remote, monitor: monitor}
+	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666}, 7)
+	if err != nil || monitor.watchID != "chrome-a" || monitor.watchGeneration != 7 || monitor.watchPID != 4242 {
+		t.Fatalf("monitor watch = %#v, error = %v", monitor, err)
+	}
+}
+
 func TestInstanceStopperGracefullyStopsOnlyVerifiedManagedProfile(t *testing.T) {
 	managed := &fakeManagedStopper{use: browser.ProfileUse{Occupied: true, PID: 4242, Source: "chub_registry"}, releaseOnStop: true}
 	stopper := instanceStopper{launcher: managed, managedProfiles: managed, waitTimeout: time.Second, waitInterval: time.Millisecond}
-	err := stopper.Stop(context.Background(), ui.InstanceRow{ID: "managed", Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`})
+	err := stopper.Stop(context.Background(), ui.InstanceRow{ID: "managed", Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`}, 1)
 	if err != nil || managed.stopCalls != 1 || managed.force || managed.userDataDir != `C:\profiles\managed` {
 		t.Fatalf("Stop() = %v, calls=%d force=%v dir=%q", err, managed.stopCalls, managed.force, managed.userDataDir)
 	}
 }
 
+func TestInstanceStopperMarksExpectedManagedExit(t *testing.T) {
+	managed := &fakeManagedStopper{use: browser.ProfileUse{Occupied: true, PID: 4242, Source: "chub_registry"}, releaseOnStop: true}
+	monitor := &fakeManagedExitObserver{expectReturn: true}
+	stopper := instanceStopper{launcher: managed, managedProfiles: managed, monitor: monitor, waitTimeout: time.Second, waitInterval: time.Millisecond}
+	err := stopper.Stop(context.Background(), ui.InstanceRow{ID: "managed", Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`}, 9)
+	if err != nil || monitor.expectID != "managed" || monitor.expectGeneration != 9 || monitor.expectPID != 4242 || monitor.clearCalls != 0 {
+		t.Fatalf("expected stop monitor = %#v, error = %v", monitor, err)
+	}
+}
+
+func TestManagedExitMonitorReportsExpectedExit(t *testing.T) {
+	results := make(chan ui.ManagedInstanceExit, 1)
+	monitor := newManagedExitMonitor(func(result ui.ManagedInstanceExit) { results <- result }, nil)
+	defer monitor.Close()
+	handle := &controlledProcessHandle{pid: 4242, done: make(chan processWaitResult, 1)}
+	monitor.Watch("managed", 3, handle)
+	if !monitor.ExpectStop("managed", 3, 4242) {
+		t.Fatal("expected monitored process to accept expected stop")
+	}
+	handle.done <- processWaitResult{code: 17}
+	select {
+	case result := <-results:
+		if result.InstanceID != "managed" || result.LaunchGeneration != 3 || result.PID != 4242 || result.ExitCode != 17 || !result.ExpectedStop {
+			t.Fatalf("exit result = %#v", result)
+		}
+	case <-time.After(time.Second):
+		t.Fatal("managed exit monitor did not report process exit")
+	}
+}
+
 func TestInstanceStopperRejectsMismatchedOrExternalProfiles(t *testing.T) {
 	managed := &fakeManagedStopper{use: browser.ProfileUse{Occupied: true, PID: 4243, Source: "chub_registry"}}
 	stopper := instanceStopper{launcher: managed, managedProfiles: managed, waitTimeout: 10 * time.Millisecond, waitInterval: time.Millisecond}
-	err := stopper.Stop(context.Background(), ui.InstanceRow{Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`})
+	err := stopper.Stop(context.Background(), ui.InstanceRow{Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`}, 1)
 	if !errors.Is(err, domain.ErrIdentityMismatch) || managed.stopCalls != 0 {
 		t.Fatalf("mismatch Stop() = %v, calls=%d", err, managed.stopCalls)
 	}
-	err = stopper.Stop(context.Background(), ui.InstanceRow{Status: "运行中", PID: 4243, OccupancySource: "browser_message_window", UserDataDir: `C:\profiles\managed`})
+	err = stopper.Stop(context.Background(), ui.InstanceRow{Status: "运行中", PID: 4243, OccupancySource: "browser_message_window", UserDataDir: `C:\profiles\managed`}, 1)
 	if !errors.Is(err, domain.ErrIdentityMismatch) || managed.stopCalls != 0 {
 		t.Fatalf("external Stop() = %v, calls=%d", err, managed.stopCalls)
 	}
@@ -80,7 +121,7 @@ func TestInstanceStopperRejectsMismatchedOrExternalProfiles(t *testing.T) {
 func TestInstanceStopperDoesNotEscalateWhenGracefulCloseTimesOut(t *testing.T) {
 	managed := &fakeManagedStopper{use: browser.ProfileUse{Occupied: true, PID: 4242, Source: "chub_registry"}}
 	stopper := instanceStopper{launcher: managed, managedProfiles: managed, waitTimeout: 10 * time.Millisecond, waitInterval: time.Millisecond}
-	err := stopper.Stop(context.Background(), ui.InstanceRow{Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`})
+	err := stopper.Stop(context.Background(), ui.InstanceRow{Status: "运行中", PID: 4242, OccupancySource: "chub_registry", UserDataDir: `C:\profiles\managed`}, 1)
 	if err == nil || managed.stopCalls != 1 || managed.force {
 		t.Fatalf("timeout Stop() = %v, calls=%d force=%v", err, managed.stopCalls, managed.force)
 	}
@@ -97,7 +138,7 @@ func TestInstanceStarterAssociatesVerifiedExternalProfileWithoutLaunching(t *tes
 		remoteDebug:      remote,
 		portAllocator:    remote,
 	}
-	outcome, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666})
+	outcome, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666}, 1)
 	if err != nil || !outcome.External || outcome.PID != 16108 || outcome.RemoteDebugPort != 9668 || outcome.Source != browser.ProfileSourceMessageWindow {
 		t.Fatalf("Start() = %#v, %v", outcome, err)
 	}
@@ -117,7 +158,7 @@ func TestInstanceStarterRejectsUnverifiedExternalProfile(t *testing.T) {
 		remoteDebug:      remote,
 		portAllocator:    remote,
 	}
-	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666})
+	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666}, 1)
 	if !errors.Is(err, domain.ErrProfileOccupied) {
 		t.Fatalf("Start() error = %v", err)
 	}
@@ -213,6 +254,55 @@ func (p fakeProcessHandle) PID() int { return p.pid }
 
 func (fakeProcessHandle) Wait(context.Context) (int, error) { return 0, nil }
 
+type processWaitResult struct {
+	code int
+	err  error
+}
+
+type controlledProcessHandle struct {
+	pid  int
+	done chan processWaitResult
+}
+
+func (p *controlledProcessHandle) PID() int { return p.pid }
+
+func (p *controlledProcessHandle) Wait(ctx context.Context) (int, error) {
+	select {
+	case result := <-p.done:
+		return result.code, result.err
+	case <-ctx.Done():
+		return 0, ctx.Err()
+	}
+}
+
+type fakeManagedExitObserver struct {
+	watchID          string
+	watchGeneration  uint64
+	watchPID         int
+	expectID         string
+	expectGeneration uint64
+	expectPID        int
+	expectReturn     bool
+	clearCalls       int
+}
+
+func (m *fakeManagedExitObserver) Watch(id string, generation uint64, handle browser.ProcessHandle) {
+	m.watchID = id
+	m.watchGeneration = generation
+	if handle != nil {
+		m.watchPID = handle.PID()
+	}
+}
+
+func (m *fakeManagedExitObserver) ExpectStop(id string, generation uint64, pid int) bool {
+	m.expectID = id
+	m.expectGeneration = generation
+	m.expectPID = pid
+	return m.expectReturn
+}
+
+func (m *fakeManagedExitObserver) ClearExpectedStop(string, uint64, int) { m.clearCalls++ }
+
 type fakeManagedProfileInspector struct{ use browser.ProfileUse }
 
 func (i fakeManagedProfileInspector) InspectProfile(context.Context, string) (browser.ProfileUse, error) {

cmd/chub/managed_exit_monitor.go

@@ -0,0 +1,114 @@
+package main
+
+import (
+	"context"
+	"sync"
+
+	"chub/internal/platform/browser"
+	"chub/internal/ui"
+)
+
+// managedExitObserver keeps lifecycle observation scoped to a browser process
+// Chub started in the current application session. It never looks up a process
+// by name or attaches to an external browser.
+type managedExitObserver interface {
+	Watch(instanceID string, launchGeneration uint64, handle browser.ProcessHandle)
+	ExpectStop(instanceID string, launchGeneration uint64, pid int) bool
+	ClearExpectedStop(instanceID string, launchGeneration uint64, pid int)
+}
+
+type managedExitProcessKey struct {
+	instanceID       string
+	launchGeneration uint64
+	pid              int
+}
+
+type managedExitMonitor struct {
+	ctx        context.Context
+	cancel     context.CancelFunc
+	report     func(ui.ManagedInstanceExit)
+	invalidate func()
+
+	mu       sync.Mutex
+	active   map[string]managedExitProcessKey
+	expected map[managedExitProcessKey]bool
+}
+
+func newManagedExitMonitor(report func(ui.ManagedInstanceExit), invalidate func()) *managedExitMonitor {
+	ctx, cancel := context.WithCancel(context.Background())
+	return &managedExitMonitor{
+		ctx:        ctx,
+		cancel:     cancel,
+		report:     report,
+		invalidate: invalidate,
+		active:     make(map[string]managedExitProcessKey),
+		expected:   make(map[managedExitProcessKey]bool),
+	}
+}
+
+// Close stops notification delivery without stopping browsers. Process waits
+// observe this context and return, while the launcher's own registry cleanup
+// continues independently.
+func (m *managedExitMonitor) Close() {
+	if m != nil && m.cancel != nil {
+		m.cancel()
+	}
+}
+
+func (m *managedExitMonitor) Watch(instanceID string, launchGeneration uint64, handle browser.ProcessHandle) {
+	if m == nil || handle == nil || instanceID == "" || launchGeneration == 0 || handle.PID() <= 0 {
+		return
+	}
+	key := managedExitProcessKey{instanceID: instanceID, launchGeneration: launchGeneration, pid: handle.PID()}
+	m.mu.Lock()
+	if _, alreadyWatching := m.active[instanceID]; alreadyWatching {
+		m.mu.Unlock()
+		return
+	}
+	m.active[instanceID] = key
+	m.mu.Unlock()
+
+	go func() {
+		exitCode, _ := handle.Wait(m.ctx)
+		if m.ctx.Err() != nil {
+			return
+		}
+		m.mu.Lock()
+		expected := m.expected[key]
+		delete(m.expected, key)
+		if current, ok := m.active[instanceID]; ok && current == key {
+			delete(m.active, instanceID)
+		}
+		m.mu.Unlock()
+		if m.report != nil {
+			m.report(ui.ManagedInstanceExit{InstanceID: instanceID, LaunchGeneration: launchGeneration, PID: key.pid, ExitCode: exitCode, ExpectedStop: expected})
+		}
+		if m.invalidate != nil {
+			m.invalidate()
+		}
+	}()
+}
+
+func (m *managedExitMonitor) ExpectStop(instanceID string, launchGeneration uint64, pid int) bool {
+	if m == nil || instanceID == "" || launchGeneration == 0 || pid <= 0 {
+		return false
+	}
+	key := managedExitProcessKey{instanceID: instanceID, launchGeneration: launchGeneration, pid: pid}
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if current, ok := m.active[instanceID]; !ok || current != key {
+		return false
+	}
+	m.expected[key] = true
+	return true
+}
+
+func (m *managedExitMonitor) ClearExpectedStop(instanceID string, launchGeneration uint64, pid int) {
+	if m == nil {
+		return
+	}
+	key := managedExitProcessKey{instanceID: instanceID, launchGeneration: launchGeneration, pid: pid}
+	m.mu.Lock()
+	delete(m.expected, key)
+	m.mu.Unlock()
+}

docs/06-tasks.md

@@ -42,7 +42,7 @@
 | T-304 | 代理配置库、实例选择与安全启动参数传递 | T-303 | DONE |
 | T-305 | GUI 受管实例优雅停止与启停状态机 | T-304 | DONE |
 | T-306 | 精简代理下拉编辑与实例行安全操作布局 | T-304,T-305 | DONE |
-| T-307 | 受管浏览器意外退出监控与状态提示 | T-101,T-305,T-306 | DOING |
+| T-307 | 受管浏览器意外退出监控与状态提示 | T-101,T-305,T-306 | DONE |
 
 ## Backlog
 

docs/current-state.md

@@ -3,11 +3,12 @@
 ## 快照
 
 - 日期：2026-07-25
-- 阶段：Phase 3 真实实例操作（T-307 进行中；T-301 至 T-306、T-201 至 T-208 已完成）
-- 代码：已建立 Go module `chub`、`cmd/chub` 入口、logging 测试基座、浏览器 domain/application 合约、Chrome/Edge 参数/发现模块、启动 registry、Windows 身份/占用检查、loopback CDP 端口分配与端点校验、优雅关闭、Job Object、真实 Chrome/Edge smoke、JSON 配置存储、启动恢复、CLI JSON 合约、应用内事件总线、UI 状态测试和 Windows smoke 脚本，T-001 至 T-003、T-101 至 T-104、T-201 至 T-208、T-301 至 T-303 已完成
+- 阶段：Phase 3 真实实例操作（T-301 至 T-307、T-201 至 T-208 已完成）
+- 代码：已建立 Go module `chub`、`cmd/chub` 入口、logging 测试基座、浏览器 domain/application 合约、Chrome/Edge 参数/发现模块、启动 registry、Windows 身份/占用检查、loopback CDP 端口分配与端点校验、优雅关闭、Job Object、真实 Chrome/Edge smoke、JSON 配置存储、启动恢复、CLI JSON 合约、应用内事件总线、UI 状态测试和 Windows smoke 脚本，T-001 至 T-003、T-101 至 T-104、T-201 至 T-208、T-301 至 T-307 已完成
 - UI：Gio 双页 Shell 使用左侧“实例/设置”导航；实例页以等宽“新建实例 / 刷新实例状态”命令区开始，窄内容区自动堆叠。列表固定显示实例名称、浏览器类型、用户数据目录、调试端口、状态和带边框的操作列；操作顺序固定为启动/停止（或重新检测）、编辑、删除，删除与相邻操作保持更大间距以降低误点。主操作在已退出时启动，在 Chub 托管运行或调试不可用时显示停止，在启动/停止中禁用，在外部关联、外部占用或未知占用时仅重新检测；优雅停止通过后台 adapter 验证 registry 的 PID/profile 身份并等待其释放，绝不按进程名关闭或接管外部 Chrome/Edge。刷新通过后台回调只检查已保存实例，以配置快照丢弃编辑或删除后的过期结果；它结合 Chub registry、指定 profile 的外部占用证据和 loopback CDP 端点更新状态，但不扫描、接管或关闭其他 Chrome/Edge。双击、Enter 或编辑图标打开实例编辑弹层，支持名称、浏览器类型、User Data Dir、启动 URL、完整地址代理选择和只读实际端口；保存保留未公开启动选项，Escape 对脏表单先请求确认，活跃/外部关联实例锁定身份约束字段。设置页使用完整代理地址选择器、地址输入及保存/删除操作；选择会回填地址，保存按稳定 `proxyId` 新增或更新，删除未引用代理前必须确认，仍被实例引用的代理会被拒绝。启动通过异步回调接到 Windows 浏览器启动器：未占用目录从已保存的起始端口（空值默认 9666）选择 loopback CDP 端口，并在启动时按已选代理 ID 解析最新的 `--proxy-server` 参数；同目录外部浏览器只有在 `DevToolsActivePort` 与 CDP 端点可验证时才显示“外部已关联”，且不会接管其生命周期。删除使用确认弹层，只删除 Chub 实例配置而不删除 User Data Dir。新建、编辑和删除实例会保存到本地配置；四个设置路径有独立异步可取消搜索，切换页面后输入和任务状态保留；新建实例表单使用 Label、Windows 原生目录选择器和 Chrome/Edge RadioButton；CLI `list/events` 已可用，`start/stop/restart` 等待 BrowserManager adapter
+- T-307：本应用会话启动的受管 Chrome/Edge 根进程由单实例后台 `Wait` 监控；意外退出按 ID、启动代次和 PID 验证后立即变为“已退出”，清空运行时 PID/端口，并以可关闭、可合并的提示告知用户。提示关闭后焦点回到启动操作；Chub 请求停止、外部实例、过期事件和应用关闭取消监控均不提示。
 - 浏览器核心：设计参考来自 `D:\OPC\shop_helm\internal\platform\chrome`，尚未复制或接入本项目
-- blocker：无；当前执行 T-307 的受管浏览器意外退出监控与提示。
+- blocker：无；T-307 已完成，下一项从 Backlog 或后续需求确定。
 
 ## 当前目录
 

docs/tasks/T-307.md

@@ -3,7 +3,7 @@ id: T-307
 title: 受管浏览器意外退出监控与状态提示
 phase: 3
 deps: [T-101, T-305, T-306]
-status: DOING
+status: DONE
 created: 2026-07-25
 owner: codex
 ---
@@ -31,7 +31,7 @@ owner: codex
 
 ## 执行记录
 
-- 状态：DOING
-- 变更：待实现。
-- 验证：待执行。
+- 状态：DONE
+- 变更：新增当前会话受管进程的单实例 `Wait` 监控；退出事件按实例 ID、启动代次与 PID 回到 Shell 的线程安全结果队列。意外退出会立即恢复“已退出/启动”状态并合并显示“知道了”提示；Chub 请求停止、外部实例和过期事件不会提示。提示关闭后焦点回到该实例的启动操作。
+- 验证：新增命令入口监控与预期停止测试、Shell 的意外退出/启动期快速退出/过期事件/多个退出聚合测试；`go test -race ./cmd/chub ./internal/ui`、`go test ./...`、`go vet ./...`、`scripts/smoke-windows.ps1` 与 `scripts/smoke-browser.ps1` 均通过。
 - 阻塞：无。

internal/domain/browser.go

@@ -133,13 +133,15 @@ const (
 )
 
 type BrowserEvent struct {
-	Kind       EventKind
-	InstanceID string
-	Status     InstanceStatus
-	PID        int
-	ExitCode   *int
-	ErrorCode  ErrorCode
-	At         time.Time
+	Kind             EventKind
+	InstanceID       string
+	LaunchGeneration uint64
+	Status           InstanceStatus
+	PID              int
+	ExitCode         *int
+	ExpectedStop     bool
+	ErrorCode        ErrorCode
+	At               time.Time
 }
 
 type ErrorCode string

internal/ui/shell.go

@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+	"sync"
 
 	"chub/internal/domain"
 	"gioui.org/io/key"
@@ -75,11 +76,22 @@ type InstanceStartOutcome struct {
 	Warning         string
 }
 
-type InstanceStarter func(context.Context, InstanceRow, SettingsState) (InstanceStartOutcome, error)
+// ManagedInstanceExit is delivered by the application adapter after the root
+// process of a browser started by this Chub session exits. It contains only
+// DTO data; UI code never receives a platform process handle.
+type ManagedInstanceExit struct {
+	InstanceID       string
+	LaunchGeneration uint64
+	PID              int
+	ExitCode         int
+	ExpectedStop     bool
+}
+
+type InstanceStarter func(context.Context, InstanceRow, SettingsState, uint64) (InstanceStartOutcome, error)
 
 // InstanceStopper requests graceful shutdown only for the supplied configured
 // instance. Implementations must reject external or unverified processes.
-type InstanceStopper func(context.Context, InstanceRow) error
+type InstanceStopper func(context.Context, InstanceRow, uint64) error
 
 // InstanceRefreshResult carries a read-only status check for one configured
 // instance. The UI applies it only while the row's editable fields still match
@@ -134,6 +146,18 @@ type instanceRefreshResult struct {
 	err       error
 }
 
+type managedExitKey struct {
+	instanceID       string
+	launchGeneration uint64
+	pid              int
+}
+
+type unexpectedExitNotice struct {
+	instanceID string
+	name       string
+	browser    string
+}
+
 type pathSearchState struct {
 	request uint64
 	cancel  context.CancelFunc
@@ -277,43 +301,53 @@ type Shell struct {
 	pendingProxyDelete string
 	proxyDeleteFocus   bool
 
-	list               widget.List
-	rows               []InstanceRow
-	selectedInstanceID string
-	rowClicks          map[string]*widget.Clickable
-	startClicks        map[string]*widget.Clickable
-	editClicks         map[string]*widget.Clickable
-	deleteClicks       map[string]*widget.Clickable
-	deleteConfirm      widget.Clickable
-	deleteCancel       widget.Clickable
-	deleteBlocker      widget.Clickable
-	startStates        map[string]*instanceStartState
-	startResults       chan instanceStartResult
-	stopStates         map[string]*instanceStopState
-	stopResults        chan instanceStopResult
-	refreshClickState  instanceRefreshState
-	refreshResults     chan instanceRefreshResult
-	nextInstance       uint64
-	instanceFeedback   string
-	pendingDeleteID    string
-	editingID          string
-	editOriginal       InstanceRow
-	pendingEditDiscard bool
-	editFocusPending   bool
-	focusRestoreID     string
-	onSave             func(SettingsState)
-	onInstancesChanged func([]InstanceRow)
-	onProxiesChanged   func([]ProxyOption)
-	instanceStarter    InstanceStarter
-	instanceStopper    InstanceStopper
-	instanceRefresher  InstanceRefresher
-	pathSearcher       PathSearcher
-	invalidate         func()
-	searches           map[PathField]*pathSearchState
-	searchResults      chan pathSearchResult
-	directoryChooser   DirectoryChooser
-	directoryPick      directoryPickState
-	directoryResults   chan directoryPickResult
+	list                  widget.List
+	rows                  []InstanceRow
+	selectedInstanceID    string
+	rowClicks             map[string]*widget.Clickable
+	startClicks           map[string]*widget.Clickable
+	editClicks            map[string]*widget.Clickable
+	deleteClicks          map[string]*widget.Clickable
+	deleteConfirm         widget.Clickable
+	deleteCancel          widget.Clickable
+	deleteBlocker         widget.Clickable
+	startStates           map[string]*instanceStartState
+	startResults          chan instanceStartResult
+	stopStates            map[string]*instanceStopState
+	stopResults           chan instanceStopResult
+	refreshClickState     instanceRefreshState
+	refreshResults        chan instanceRefreshResult
+	managedExitMu         sync.Mutex
+	managedExitResults    []ManagedInstanceExit
+	pendingManagedExit    map[managedExitKey]ManagedInstanceExit
+	unexpectedExits       []unexpectedExitNotice
+	unexpectedExitOpen    bool
+	unexpectedExitAck     widget.Clickable
+	unexpectedExitBlocker widget.Clickable
+	unexpectedExitFocus   bool
+	unexpectedExitFocusID string
+	nextInstance          uint64
+	instanceFeedback      string
+	pendingDeleteID       string
+	editingID             string
+	editOriginal          InstanceRow
+	pendingEditDiscard    bool
+	editFocusPending      bool
+	focusRestoreID        string
+	focusStartID          string
+	onSave                func(SettingsState)
+	onInstancesChanged    func([]InstanceRow)
+	onProxiesChanged      func([]ProxyOption)
+	instanceStarter       InstanceStarter
+	instanceStopper       InstanceStopper
+	instanceRefresher     InstanceRefresher
+	pathSearcher          PathSearcher
+	invalidate            func()
+	searches              map[PathField]*pathSearchState
+	searchResults         chan pathSearchResult
+	directoryChooser      DirectoryChooser
+	directoryPick         directoryPickState
+	directoryResults      chan directoryPickResult
 }
 
 func NewShell(theme *material.Theme) *Shell {
@@ -327,7 +361,7 @@ func NewShell(theme *material.Theme) *Shell {
 		PathEdgeExecutable:   {},
 		PathDefaultUserData:  {},
 		PathLogDirectory:     {},
-	}, rowClicks: make(map[string]*widget.Clickable), startClicks: make(map[string]*widget.Clickable), editClicks: make(map[string]*widget.Clickable), deleteClicks: make(map[string]*widget.Clickable), proxyPickerChoices: make(map[string]*widget.Clickable), startStates: make(map[string]*instanceStartState), stopStates: make(map[string]*instanceStopState), nextInstance: 4, startResults: make(chan instanceStartResult, 8), stopResults: make(chan instanceStopResult, 8), refreshResults: make(chan instanceRefreshResult, 1), searchResults: make(chan pathSearchResult, 8), directoryResults: make(chan directoryPickResult, 1)}
+	}, rowClicks: make(map[string]*widget.Clickable), startClicks: make(map[string]*widget.Clickable), editClicks: make(map[string]*widget.Clickable), deleteClicks: make(map[string]*widget.Clickable), proxyPickerChoices: make(map[string]*widget.Clickable), startStates: make(map[string]*instanceStartState), stopStates: make(map[string]*instanceStopState), pendingManagedExit: make(map[managedExitKey]ManagedInstanceExit), nextInstance: 4, startResults: make(chan instanceStartResult, 8), stopResults: make(chan instanceStopResult, 8), refreshResults: make(chan instanceRefreshResult, 1), searchResults: make(chan pathSearchResult, 8), directoryResults: make(chan directoryPickResult, 1)}
 	s.chromePath.SetText(`C:\Program Files\Google\Chrome\Application\chrome.exe`)
 	s.edgePath.SetText(`C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe`)
 	s.dataDir.SetText(`C:\Users\Public\chub\profiles`)
@@ -407,6 +441,19 @@ func (s *Shell) OnStopInstance(stopper InstanceStopper, invalidate func()) {
 	s.invalidate = invalidate
 }
 
+// ReportManagedExit is safe for the application's single per-instance monitor
+// goroutine. The event is consumed during the next UI frame and therefore does
+// not perform layout or mutate widgets from a background thread. The monitor
+// that reports this result is responsible for invalidating its window.
+func (s *Shell) ReportManagedExit(result ManagedInstanceExit) {
+	if result.InstanceID == "" || result.LaunchGeneration == 0 || result.PID <= 0 {
+		return
+	}
+	s.managedExitMu.Lock()
+	s.managedExitResults = append(s.managedExitResults, result)
+	s.managedExitMu.Unlock()
+}
+
 func (s *Shell) OnRefreshInstances(refresher InstanceRefresher, invalidate func()) {
 	s.instanceRefresher = refresher
 	s.invalidate = invalidate
@@ -428,8 +475,12 @@ func (s *Shell) Layout(gtx layout.Context) layout.Dimensions {
 	s.consumeStartResults()
 	s.consumeStopResults()
 	s.consumeRefreshResults()
+	s.consumeManagedExitResults()
+	s.presentUnexpectedExitIfReady()
 	s.consumeKeyboard(gtx)
-	if s.pendingDeleteID != "" {
+	if s.unexpectedExitOpen {
+		s.consumeUnexpectedExitDialog(gtx)
+	} else if s.pendingDeleteID != "" {
 		s.consumeDeleteConfirmation(gtx)
 	} else if s.pendingProxyDelete != "" {
 		s.consumeProxyDeleteConfirmation(gtx)
@@ -438,6 +489,7 @@ func (s *Shell) Layout(gtx layout.Context) layout.Dimensions {
 	} else {
 		s.consumeControls(gtx)
 	}
+	s.presentUnexpectedExitIfReady()
 	mainLayout := func(gtx layout.Context) layout.Dimensions {
 		return layout.Flex{Axis: layout.Horizontal}.Layout(gtx,
 			layout.Rigid(s.sidebar),
@@ -446,9 +498,15 @@ func (s *Shell) Layout(gtx layout.Context) layout.Dimensions {
 			}),
 		)
 	}
-	if s.pendingDeleteID == "" && s.pendingProxyDelete == "" && s.editingID == "" && !s.proxyPicker.open {
+	if !s.unexpectedExitOpen && s.pendingDeleteID == "" && s.pendingProxyDelete == "" && s.editingID == "" && !s.proxyPicker.open {
 		return mainLayout(gtx)
 	}
+	if s.unexpectedExitOpen {
+		return layout.Stack{Alignment: layout.Center}.Layout(gtx,
+			layout.Expanded(mainLayout),
+			layout.Stacked(s.unexpectedExitDialog),
+		)
+	}
 	if s.pendingDeleteID != "" {
 		return layout.Stack{Alignment: layout.Center}.Layout(gtx,
 			layout.Expanded(mainLayout),
@@ -546,7 +604,9 @@ func (s *Shell) consumeKeyboard(gtx layout.Context) {
 		}
 		switch keyEvent.Name {
 		case key.NameEscape:
-			if s.pendingProxyDelete != "" {
+			if s.unexpectedExitOpen {
+				s.dismissUnexpectedExitNotice()
+			} else if s.pendingProxyDelete != "" {
 				s.cancelProxyDelete()
 			} else if s.proxyPicker.open {
 				s.proxyPicker.open = false
@@ -919,18 +979,24 @@ func (s *Shell) instanceActionButtons(row InstanceRow) layout.Widget {
 	return func(gtx layout.Context) layout.Dimensions {
 		return layout.E.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
 			mode := instanceActionFor(row)
+			startClick := s.startClickFor(row.ID)
 			actionLabel := mode.label + " " + row.Name
 			actionIcon := instanceStartIcon
 			if mode.stop {
 				actionIcon = instanceStopIcon
 			}
-			return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
-				layout.Rigid(s.instanceIconButton(s.startClickFor(row.ID), actionIcon, actionLabel, s.theme.Palette.ContrastBg, mode.enabled)),
+			dims := layout.Flex{Alignment: layout.Middle}.Layout(gtx,
+				layout.Rigid(s.instanceIconButton(startClick, actionIcon, actionLabel, s.theme.Palette.ContrastBg, mode.enabled)),
 				layout.Rigid(layout.Spacer{Width: unit.Dp(6)}.Layout),
 				layout.Rigid(s.instanceIconButton(s.editClickFor(row.ID), instanceEditIcon, "编辑 "+row.Name, s.theme.Palette.ContrastBg)),
 				layout.Rigid(layout.Spacer{Width: unit.Dp(10)}.Layout),
 				layout.Rigid(s.instanceIconButton(s.deleteClickFor(row.ID), instanceDeleteIcon, "删除 "+row.Name, color.NRGBA{R: 188, G: 51, B: 51, A: 255})),
 			)
+			if s.focusStartID == row.ID {
+				gtx.Execute(key.FocusCmd{Tag: startClick})
+				s.focusStartID = ""
+			}
+			return dims
 		})
 	}
 }
@@ -1270,6 +1336,79 @@ func (s *Shell) proxyDeleteConfirmButton(gtx layout.Context) layout.Dimensions {
 	return style.Layout(gtx)
 }
 
+func (s *Shell) unexpectedExitDialog(gtx layout.Context) layout.Dimensions {
+	if !s.unexpectedExitOpen || len(s.unexpectedExits) == 0 {
+		return layout.Dimensions{}
+	}
+	gtx.Constraints.Min = gtx.Constraints.Max
+	return s.unexpectedExitBlocker.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+		defer clip.Rect{Max: gtx.Constraints.Min}.Push(gtx.Ops).Pop()
+		paint.Fill(gtx.Ops, color.NRGBA{R: 0, G: 0, B: 0, A: 92})
+		return layout.Center.Layout(gtx, s.unexpectedExitCard)
+	})
+}
+
+func (s *Shell) unexpectedExitCard(gtx layout.Context) layout.Dimensions {
+	if maxWidth := gtx.Dp(480); gtx.Constraints.Max.X > maxWidth {
+		gtx.Constraints.Max.X = maxWidth
+	}
+	title := "浏览器已退出"
+	message := "检测到以下由 Chub 启动的浏览器已退出。"
+	if len(s.unexpectedExits) == 1 {
+		notice := s.unexpectedExits[0]
+		message = fmt.Sprintf("检测到“%s”的 %s 已退出。", notice.name, notice.browser)
+	} else {
+		title = fmt.Sprintf("%d 个浏览器已退出", len(s.unexpectedExits))
+	}
+	return layout.Background{}.Layout(gtx,
+		func(gtx layout.Context) layout.Dimensions {
+			rect := image.Rectangle{Max: gtx.Constraints.Min}
+			defer clip.UniformRRect(rect, gtx.Dp(8)).Push(gtx.Ops).Pop()
+			paint.Fill(gtx.Ops, s.theme.Palette.Bg)
+			return layout.Dimensions{Size: gtx.Constraints.Min}
+		},
+		func(gtx layout.Context) layout.Dimensions {
+			return layout.Inset{Top: unit.Dp(20), Right: unit.Dp(24), Bottom: unit.Dp(20), Left: unit.Dp(24)}.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+				children := []layout.FlexChild{
+					layout.Rigid(material.H6(s.theme, title).Layout),
+					layout.Rigid(layout.Spacer{Height: unit.Dp(8)}.Layout),
+					layout.Rigid(material.Body1(s.theme, message).Layout),
+				}
+				if len(s.unexpectedExits) > 1 {
+					for index, notice := range s.unexpectedExits {
+						if index == 5 {
+							children = append(children,
+								layout.Rigid(layout.Spacer{Height: unit.Dp(6)}.Layout),
+								layout.Rigid(material.Caption(s.theme, fmt.Sprintf("另有 %d 个实例已退出。", len(s.unexpectedExits)-index)).Layout),
+							)
+							break
+						}
+						notice := notice
+						children = append(children,
+							layout.Rigid(layout.Spacer{Height: unit.Dp(6)}.Layout),
+							layout.Rigid(material.Body2(s.theme, fmt.Sprintf("• %s · %s", notice.name, notice.browser)).Layout),
+						)
+					}
+				}
+				children = append(children,
+					layout.Rigid(layout.Spacer{Height: unit.Dp(10)}.Layout),
+					layout.Rigid(material.Caption(s.theme, "实例配置和 User Data Dir 未被删除。关闭提示后可重新启动。").Layout),
+					layout.Rigid(layout.Spacer{Height: unit.Dp(18)}.Layout),
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						return layout.E.Layout(gtx, material.Button(s.theme, &s.unexpectedExitAck, "知道了").Layout)
+					}),
+				)
+				dims := layout.Flex{Axis: layout.Vertical}.Layout(gtx, children...)
+				if s.unexpectedExitFocus {
+					gtx.Execute(key.FocusCmd{Tag: &s.unexpectedExitAck})
+					s.unexpectedExitFocus = false
+				}
+				return dims
+			})
+		},
+	)
+}
+
 func statusLabel(theme *material.Theme, status string) layout.Widget {
 	style := material.Label(theme, unit.Sp(13), status)
 	style.Color = theme.Palette.Fg
@@ -1957,7 +2096,8 @@ func (s *Shell) requestStop(id string) {
 		s.instanceFeedback = fmt.Sprintf("%s 正在停止，请稍候。", row.Name)
 		return
 	}
-	if s.instanceStopper == nil {
+	stopper := s.instanceStopper
+	if stopper == nil {
 		s.instanceFeedback = "浏览器停止服务尚未准备好。"
 		return
 	}
@@ -1968,14 +2108,19 @@ func (s *Shell) requestStop(id string) {
 	state.request++
 	request := state.request
 	state.running = true
+	launchGeneration := uint64(0)
+	if started := s.startStates[id]; started != nil {
+		launchGeneration = started.request
+	}
 	state.previousStatus = row.Status
 	s.setInstanceStatus(id, "停止中")
 	s.instanceFeedback = fmt.Sprintf("正在请求 %s 正常退出…", row.Name)
+	invalidate := s.invalidate
 	go func() {
-		err := s.instanceStopper(context.Background(), row)
+		err := stopper(context.Background(), row, launchGeneration)
 		s.stopResults <- instanceStopResult{id: id, request: request, err: err}
-		if s.invalidate != nil {
-			s.invalidate()
+		if invalidate != nil {
+			invalidate()
 		}
 	}()
 }
@@ -1995,7 +2140,8 @@ func (s *Shell) requestStart(id string) {
 		s.instanceFeedback = fmt.Sprintf("%s 正在停止，请等待退出后再启动。", row.Name)
 		return
 	}
-	if s.instanceStarter == nil {
+	starter := s.instanceStarter
+	if starter == nil {
 		s.instanceFeedback = "浏览器启动服务尚未准备好。"
 		return
 	}
@@ -2013,11 +2159,12 @@ func (s *Shell) requestStart(id string) {
 	state.running = true
 	s.setInstanceStatus(id, "启动中")
 	s.instanceFeedback = fmt.Sprintf("正在启动 %s…", row.Name)
+	invalidate := s.invalidate
 	go func() {
-		outcome, err := s.instanceStarter(context.Background(), row, settings)
+		outcome, err := starter(context.Background(), row, settings, request)
 		s.startResults <- instanceStartResult{id: id, request: request, outcome: outcome, err: err}
-		if s.invalidate != nil {
-			s.invalidate()
+		if invalidate != nil {
+			invalidate()
 		}
 	}()
 }
@@ -2089,6 +2236,9 @@ func (s *Shell) consumeStartResults() {
 				status = "运行中（调试不可用）"
 			}
 			s.setInstanceRuntime(result.id, status, result.outcome.PID, result.outcome.RemoteDebugPort, "chub_registry")
+			if s.applyPendingManagedExit(result.id, result.request, result.outcome.PID) {
+				continue
+			}
 			if result.outcome.Warning != "" {
 				s.instanceFeedback = fmt.Sprintf("%s 已启动（PID %d），但%s。", row.Name, result.outcome.PID, result.outcome.Warning)
 			} else {
@@ -2105,7 +2255,8 @@ func (s *Shell) requestRefresh() {
 		s.instanceFeedback = "实例状态正在刷新，请稍候。"
 		return
 	}
-	if s.instanceRefresher == nil {
+	refresher := s.instanceRefresher
+	if refresher == nil {
 		s.instanceFeedback = "实例状态刷新服务尚未准备好。"
 		return
 	}
@@ -2118,11 +2269,12 @@ func (s *Shell) requestRefresh() {
 	request := s.refreshClickState.request
 	s.refreshClickState.running = true
 	s.instanceFeedback = "正在刷新已保存实例的状态…"
+	invalidate := s.invalidate
 	go func() {
-		results, err := s.instanceRefresher(context.Background(), rows)
+		results, err := refresher(context.Background(), rows)
 		s.refreshResults <- instanceRefreshResult{request: request, snapshots: snapshots, results: results, err: err}
-		if s.invalidate != nil {
-			s.invalidate()
+		if invalidate != nil {
+			invalidate()
 		}
 	}()
 }
@@ -2172,6 +2324,66 @@ func (s *Shell) consumeRefreshResults() {
 	}
 }
 
+func (s *Shell) consumeManagedExitResults() {
+	s.managedExitMu.Lock()
+	results := s.managedExitResults
+	s.managedExitResults = nil
+	s.managedExitMu.Unlock()
+	for _, result := range results {
+		key := managedExitKey{instanceID: result.InstanceID, launchGeneration: result.LaunchGeneration, pid: result.PID}
+		row, exists := s.instanceRow(result.InstanceID)
+		if !exists {
+			continue
+		}
+		state := s.startStates[result.InstanceID]
+		if state != nil && state.running && state.request == result.LaunchGeneration && row.Status == "启动中" {
+			s.pendingManagedExit[key] = result
+			continue
+		}
+		s.applyManagedExit(result)
+	}
+}
+
+func (s *Shell) applyPendingManagedExit(id string, launchGeneration uint64, pid int) bool {
+	key := managedExitKey{instanceID: id, launchGeneration: launchGeneration, pid: pid}
+	result, exists := s.pendingManagedExit[key]
+	if !exists {
+		return false
+	}
+	delete(s.pendingManagedExit, key)
+	return s.applyManagedExit(result)
+}
+
+func (s *Shell) applyManagedExit(result ManagedInstanceExit) bool {
+	row, exists := s.instanceRow(result.InstanceID)
+	if !exists || row.PID != result.PID {
+		return false
+	}
+	state := s.startStates[result.InstanceID]
+	if state == nil || state.request != result.LaunchGeneration {
+		return false
+	}
+	if row.Status != "运行中" && row.Status != "运行中（调试不可用）" && row.Status != "停止中" {
+		return false
+	}
+	s.setInstanceRuntime(result.InstanceID, "已退出", 0, 0, "")
+	if result.ExpectedStop || row.Status == "停止中" {
+		s.instanceFeedback = fmt.Sprintf("%s 已正常退出。", row.Name)
+		return true
+	}
+	for _, notice := range s.unexpectedExits {
+		if notice.instanceID == row.ID {
+			return true
+		}
+	}
+	s.unexpectedExits = append(s.unexpectedExits, unexpectedExitNotice{instanceID: row.ID, name: row.Name, browser: row.Browser})
+	if s.unexpectedExitFocusID == "" {
+		s.unexpectedExitFocusID = row.ID
+	}
+	s.instanceFeedback = fmt.Sprintf("检测到“%s”的 %s 已退出，可重新启动。", row.Name, row.Browser)
+	return true
+}
+
 func instanceRefreshFingerprint(row InstanceRow) string {
 	return strings.Join([]string{row.ID, row.Name, row.Browser, row.UserDataDir, row.TargetURL, row.ProxyID}, "\x00")
 }
@@ -2215,6 +2427,34 @@ func (s *Shell) consumeProxyDeleteConfirmation(gtx layout.Context) {
 	}
 }
 
+func (s *Shell) consumeUnexpectedExitDialog(gtx layout.Context) {
+	for s.unexpectedExitBlocker.Clicked(gtx) {
+	}
+	for s.unexpectedExitAck.Clicked(gtx) {
+		s.dismissUnexpectedExitNotice()
+	}
+}
+
+func (s *Shell) hasOtherModal() bool {
+	return s.pendingDeleteID != "" || s.pendingProxyDelete != "" || s.editingID != "" || s.pendingEditDiscard || s.proxyPicker.open
+}
+
+func (s *Shell) presentUnexpectedExitIfReady() {
+	if s.unexpectedExitOpen || len(s.unexpectedExits) == 0 || s.hasOtherModal() {
+		return
+	}
+	s.unexpectedExitOpen = true
+	s.unexpectedExitFocus = true
+}
+
+func (s *Shell) dismissUnexpectedExitNotice() {
+	s.unexpectedExitOpen = false
+	s.unexpectedExitFocus = false
+	s.unexpectedExits = nil
+	s.focusStartID = s.unexpectedExitFocusID
+	s.unexpectedExitFocusID = ""
+}
+
 func (s *Shell) cancelDelete() {
 	if row, ok := s.instanceRow(s.pendingDeleteID); ok {
 		s.instanceFeedback = fmt.Sprintf("已取消删除实例“%s”。", row.Name)

internal/ui/shell_test.go

@@ -129,7 +129,7 @@ func TestShellStartsInstanceAsynchronouslyAndAppliesResult(t *testing.T) {
 	shell := NewShell(material.NewTheme())
 	target := shell.rows[0]
 	started := make(chan InstanceRow, 1)
-	shell.OnStartInstance(func(_ context.Context, row InstanceRow, _ SettingsState) (InstanceStartOutcome, error) {
+	shell.OnStartInstance(func(_ context.Context, row InstanceRow, _ SettingsState, _ uint64) (InstanceStartOutcome, error) {
 		started <- row
 		return InstanceStartOutcome{PID: 4242, RemoteDebugPort: 9666}, nil
 	}, nil)
@@ -165,7 +165,7 @@ func TestShellDoesNotStartTheSameInstanceTwiceWhilePending(t *testing.T) {
 	entered := make(chan struct{}, 1)
 	release := make(chan struct{})
 	var calls atomic.Int32
-	shell.OnStartInstance(func(_ context.Context, _ InstanceRow, _ SettingsState) (InstanceStartOutcome, error) {
+	shell.OnStartInstance(func(_ context.Context, _ InstanceRow, _ SettingsState, _ uint64) (InstanceStartOutcome, error) {
 		calls.Add(1)
 		entered <- struct{}{}
 		<-release
@@ -196,7 +196,7 @@ func TestShellStopsManagedInstanceAsynchronouslyAndRestoresStartAction(t *testin
 	shell := NewShell(material.NewTheme())
 	target := shell.rows[0]
 	stopped := make(chan InstanceRow, 1)
-	shell.OnStopInstance(func(_ context.Context, row InstanceRow) error {
+	shell.OnStopInstance(func(_ context.Context, row InstanceRow, _ uint64) error {
 		stopped <- row
 		return nil
 	}, nil)
@@ -233,7 +233,7 @@ func TestShellDoesNotStopTheSameInstanceTwiceOrExternalInstance(t *testing.T) {
 	entered := make(chan struct{}, 1)
 	release := make(chan struct{})
 	var calls atomic.Int32
-	shell.OnStopInstance(func(context.Context, InstanceRow) error {
+	shell.OnStopInstance(func(context.Context, InstanceRow, uint64) error {
 		calls.Add(1)
 		entered <- struct{}{}
 		<-release
@@ -260,8 +260,8 @@ func TestShellDoesNotStopTheSameInstanceTwiceOrExternalInstance(t *testing.T) {
 
 	external := shell.rows[2]
 	var externalStops atomic.Int32
-	shell.OnStopInstance(func(context.Context, InstanceRow) error { externalStops.Add(1); return nil }, nil)
-	shell.OnStartInstance(func(context.Context, InstanceRow, SettingsState) (InstanceStartOutcome, error) {
+	shell.OnStopInstance(func(context.Context, InstanceRow, uint64) error { externalStops.Add(1); return nil }, nil)
+	shell.OnStartInstance(func(context.Context, InstanceRow, SettingsState, uint64) (InstanceStartOutcome, error) {
 		return InstanceStartOutcome{External: true, Source: "browser_message_window"}, nil
 	}, nil)
 	shell.requestInstanceAction(external.ID)
@@ -273,7 +273,7 @@ func TestShellDoesNotStopTheSameInstanceTwiceOrExternalInstance(t *testing.T) {
 func TestShellRestoresManagedStatusAfterStopFailure(t *testing.T) {
 	shell := NewShell(material.NewTheme())
 	target := shell.rows[0]
-	shell.OnStopInstance(func(context.Context, InstanceRow) error { return errors.New("permission denied") }, nil)
+	shell.OnStopInstance(func(context.Context, InstanceRow, uint64) error { return errors.New("permission denied") }, nil)
 	shell.requestInstanceAction(target.ID)
 	var result instanceStopResult
 	select {
@@ -358,7 +358,7 @@ func TestShellNormalizesRemoteDebugStartPort(t *testing.T) {
 func TestShellMarksExternalAssociationWithoutManagingLifecycle(t *testing.T) {
 	shell := NewShell(material.NewTheme())
 	target := shell.rows[2]
-	shell.OnStartInstance(func(_ context.Context, _ InstanceRow, _ SettingsState) (InstanceStartOutcome, error) {
+	shell.OnStartInstance(func(_ context.Context, _ InstanceRow, _ SettingsState, _ uint64) (InstanceStartOutcome, error) {
 		return InstanceStartOutcome{PID: 16108, RemoteDebugPort: 9668, External: true, Source: "browser_message_window"}, nil
 	}, nil)
 
@@ -624,3 +624,96 @@ func TestShellSavesProxyFromAddressPicker(t *testing.T) {
 		t.Fatalf("created proxy = %#v, selected %q, changes %d", shell.proxies, shell.settingsProxyID, changes)
 	}
 }
+
+func TestShellMarksUnexpectedManagedExitAndRestoresStartFocus(t *testing.T) {
+	shell := NewShell(material.NewTheme())
+	target := shell.rows[0]
+	shell.startStates[target.ID] = &instanceStartState{request: 7}
+
+	shell.ReportManagedExit(ManagedInstanceExit{InstanceID: target.ID, LaunchGeneration: 7, PID: target.PID, ExitCode: 0})
+	shell.consumeManagedExitResults()
+	shell.presentUnexpectedExitIfReady()
+
+	row, ok := shell.instanceRow(target.ID)
+	if !ok || row.Status != "已退出" || row.PID != 0 || row.RemoteDebugPort != 0 || row.OccupancySource != "" || !shell.unexpectedExitOpen || len(shell.unexpectedExits) != 1 {
+		t.Fatalf("unexpected exit state = row %#v, dialog %v, notices %#v", row, shell.unexpectedExitOpen, shell.unexpectedExits)
+	}
+	if mode := instanceActionFor(row); !mode.enabled || mode.stop || mode.label != "启动" {
+		t.Fatalf("action after unexpected exit = %#v", mode)
+	}
+
+	shell.dismissUnexpectedExitNotice()
+	if shell.unexpectedExitOpen || len(shell.unexpectedExits) != 0 || shell.focusStartID != target.ID {
+		t.Fatalf("dismissed unexpected exit state = open %v, notices %#v, focus %q", shell.unexpectedExitOpen, shell.unexpectedExits, shell.focusStartID)
+	}
+}
+
+func TestShellDoesNotNotifyExpectedOrStaleManagedExit(t *testing.T) {
+	shell := NewShell(material.NewTheme())
+	target := shell.rows[0]
+	shell.startStates[target.ID] = &instanceStartState{request: 3}
+
+	shell.ReportManagedExit(ManagedInstanceExit{InstanceID: target.ID, LaunchGeneration: 2, PID: target.PID, ExitCode: 0})
+	shell.consumeManagedExitResults()
+	if row, _ := shell.instanceRow(target.ID); row.Status != "运行中" || len(shell.unexpectedExits) != 0 {
+		t.Fatalf("stale exit changed row = %#v, notices %#v", row, shell.unexpectedExits)
+	}
+
+	shell.ReportManagedExit(ManagedInstanceExit{InstanceID: target.ID, LaunchGeneration: 3, PID: target.PID, ExitCode: 0, ExpectedStop: true})
+	shell.consumeManagedExitResults()
+	shell.presentUnexpectedExitIfReady()
+	if row, _ := shell.instanceRow(target.ID); row.Status != "已退出" || len(shell.unexpectedExits) != 0 || shell.unexpectedExitOpen {
+		t.Fatalf("expected exit state = row %#v, notices %#v, dialog %v", row, shell.unexpectedExits, shell.unexpectedExitOpen)
+	}
+}
+
+func TestShellAppliesManagedExitThatArrivesDuringStart(t *testing.T) {
+	shell := NewShell(material.NewTheme())
+	target := shell.rows[0]
+	target.Status = "启动中"
+	target.PID = 0
+	target.RemoteDebugPort = 0
+	shell.rows[0] = target
+	shell.startStates[target.ID] = &instanceStartState{request: 5, running: true}
+
+	shell.ReportManagedExit(ManagedInstanceExit{InstanceID: target.ID, LaunchGeneration: 5, PID: 5123, ExitCode: 1})
+	shell.consumeManagedExitResults()
+	if len(shell.pendingManagedExit) != 1 {
+		t.Fatalf("pending managed exits = %#v", shell.pendingManagedExit)
+	}
+
+	shell.startStates[target.ID].running = false
+	shell.setInstanceRuntime(target.ID, "运行中", 5123, 9666, "chub_registry")
+	if !shell.applyPendingManagedExit(target.ID, 5, 5123) {
+		t.Fatal("pending managed exit was not applied")
+	}
+	shell.presentUnexpectedExitIfReady()
+	if row, _ := shell.instanceRow(target.ID); row.Status != "已退出" || !shell.unexpectedExitOpen {
+		t.Fatalf("quick exit after start = row %#v, dialog %v", row, shell.unexpectedExitOpen)
+	}
+}
+
+func TestShellAggregatesManagedExitNoticesUntilOtherModalCloses(t *testing.T) {
+	shell := NewShell(material.NewTheme())
+	shell.SetInstances([]InstanceRow{
+		{ID: "chrome", Name: "运营 Chrome", Browser: "Chrome", UserDataDir: t.TempDir(), PID: 4001, RemoteDebugPort: 9666, OccupancySource: "chub_registry", Status: "运行中"},
+		{ID: "edge", Name: "审核 Edge", Browser: "Edge", UserDataDir: t.TempDir(), PID: 4002, RemoteDebugPort: 9667, OccupancySource: "chub_registry", Status: "运行中"},
+	})
+	shell.startStates["chrome"] = &instanceStartState{request: 1}
+	shell.startStates["edge"] = &instanceStartState{request: 2}
+	shell.editingID = "editing"
+
+	shell.ReportManagedExit(ManagedInstanceExit{InstanceID: "chrome", LaunchGeneration: 1, PID: 4001})
+	shell.ReportManagedExit(ManagedInstanceExit{InstanceID: "edge", LaunchGeneration: 2, PID: 4002})
+	shell.consumeManagedExitResults()
+	shell.presentUnexpectedExitIfReady()
+	if shell.unexpectedExitOpen || len(shell.unexpectedExits) != 2 {
+		t.Fatalf("queued notices = open %v, notices %#v", shell.unexpectedExitOpen, shell.unexpectedExits)
+	}
+
+	shell.editingID = ""
+	shell.presentUnexpectedExitIfReady()
+	if !shell.unexpectedExitOpen || len(shell.unexpectedExits) != 2 {
+		t.Fatalf("aggregated notices = open %v, notices %#v", shell.unexpectedExitOpen, shell.unexpectedExits)
+	}
+}