diff --git a/progress.md b/progress.md
index 72b7838..e0ad73c 100644
--- a/progress.md
+++ b/progress.md
@@ -595,3 +595,12 @@
 - 阻塞：窗口目视需 Windows。
 - 决策：画廊数据源用 `Present` 里的确认帧（`update.Image` 是 render 输出的截图内容）+ `update.Events` 记录，按 event_id 去重、UI 线程外收集；`paint.ImageOp` 每项只建一次并缓存，避免逐帧重解；双击用点击时间窗判定，全图弹窗复用遮罩 Stack。
 - 下一步：改 window.go 布局与画廊，交叉编译通过后用户 Windows 目视。
+
+## 【2026-07-23】T-307 V2 监控界面优化（代码完成 + 交叉编译验证）
+
+- 状态：DOING（代码完成 + Windows 交叉编译通过；窗口目视需 Windows）
+- 变更：重写 `v2/internal/ui/window.go` 布局——右栏：①运行状态+检测状态压一行（Critical 红）②开始/停止用 `smallButton`（小内边距/字号）同一行 ③"事件"文本与"红色=确认摔倒"说明同一行 ④剩余区域 `layoutGallery` 3×3 倒序展示最近 9 张确认截图 ⑤双击缩略图（350ms 内两次点击）经 `layoutViewer` 全屏遮罩弹全图、"关闭"按钮退出。画廊数据源：`Present` 收到含确认事件的 `update`（`update.Image` 即 render 截图内容）时按 event_id 去重入队（UI 线程外），`layout` 里每项建一次 `paint.ImageOp` 缓存、超 9 张淘汰最老。确认弹窗与图片弹窗共用遮罩 Stack。
+- 验证：`GOOS=windows GOARCH=amd64 CGO_ENABLED=0 go build -mod=vendor ./internal/ui/... ./cmd/ui-spike/...` 退出码 0。未引入新依赖（仅 stdlib `time`），vendor 不变。本环境无法运行 Gio，布局/双击目视需 Windows。
+- 阻塞：窗口目视需 Windows。
+- 决策：缩略图与全图复用同一 `ImageOp`（Gio 只上传一次纹理，缩略图 cell 用 `Fit:Contain` 缩放）；`gallery` 存指针避免拷贝 `widget.Clickable`；`viewing` 存 `*galleryItem` 指针，列表重排也稳定。
+- 下一步：用户 Windows `go run ./cmd/silver-pose` 目视新布局与画廊、双击看原图；据反馈微调间距/比例后置 DONE。
diff --git a/v2/internal/ui/window.go b/v2/internal/ui/window.go
index f9d13ec..2ac6c8e 100644
--- a/v2/internal/ui/window.go
+++ b/v2/internal/ui/window.go
@@ -8,6 +8,7 @@ import (
 	"os"
 	"strings"
 	"sync"
+	"time"
 
 	"gioui.org/app"
 	"gioui.org/font/gofont"
@@ -25,6 +26,8 @@ import (
 	"silverpose/v2/internal/monitor"
 )
 
+const galleryCapacity = 9 // 3 columns x 3 rows
+
 // Light Windows theme tokens (see docs/ui/silver-pose-ui-ux-spec.md).
 var (
 	colorBg      = color.NRGBA{R: 0xEA, G: 0xF1, B: 0xF8, A: 0xFF}
@@ -33,7 +36,7 @@ var (
 	colorSubtle  = color.NRGBA{R: 0x52, G: 0x65, B: 0x7C, A: 0xFF}
 	colorAccent  = color.NRGBA{R: 0x25, G: 0x63, B: 0xEB, A: 0xFF}
 	colorAlert   = color.NRGBA{R: 0xC6, G: 0x28, B: 0x28, A: 0xFF}
-	colorScrim   = color.NRGBA{A: 0x8C}
+	colorScrim   = color.NRGBA{A: 0xB0}
 )
 
 type Settings struct {
@@ -48,11 +51,23 @@ type Commands struct {
 	Stop  func()
 }
 
-// Window is an observer of monitor updates. It owns no stream, runtime, fall
-// engine or artifact writer. Background goroutines call Present/PresentAlert/
-// ReportIssue, which only mutate shared state under a lock and Invalidate; the
-// Gio event loop (its own goroutine) reads that state and renders the newest
-// frame. This replaces Walk's main.Synchronize and its comctl/manifest coupling.
+// galleryIncoming is a confirmed screenshot queued off the UI thread. The Gio
+// op is built once on the UI thread when it is promoted into galleryItem.
+type galleryIncoming struct {
+	caption string
+	image   *image.RGBA
+}
+
+type galleryItem struct {
+	caption   string
+	op        paint.ImageOp
+	click     widget.Clickable
+	lastClick time.Time
+}
+
+// Window observes monitor updates. Background goroutines call Present/
+// PresentAlert/ReportIssue, which only mutate shared state under a lock and
+// Invalidate; the Gio event loop reads that state and renders.
 type Window struct {
 	appWindow *app.Window
 	theme     *material.Theme
@@ -66,6 +81,8 @@ type Window struct {
 	imageGen    uint64
 	pending     *alert.Record
 	seenAlerts  map[string]struct{}
+	incoming    []galleryIncoming
+	seenEvents  map[string]struct{}
 
 	// Touched only by the event-loop goroutine.
 	imageOp       paint.ImageOp
@@ -76,7 +93,9 @@ type Window struct {
 	startButton   widget.Clickable
 	stopButton    widget.Clickable
 	ackButton     widget.Clickable
-	running       bool
+	gallery       []*galleryItem
+	viewing       *galleryItem
+	viewerClose   widget.Clickable
 }
 
 func NewWindow(settings Settings, commands Commands) (*Window, error) {
@@ -105,15 +124,13 @@ func NewWindow(settings Settings, commands Commands) (*Window, error) {
 		spec:       spec,
 		model:      model,
 		seenAlerts: make(map[string]struct{}),
+		seenEvents: make(map[string]struct{}),
 		tabs:       []string{"监控", "设置"},
 	}
 	window.tabButton = make([]widget.Clickable, len(window.tabs))
 	return window, nil
 }
 
-// Run drives the platform event loop on the calling (main) goroutine and the
-// window loop on a separate goroutine. It does not return; the process exits
-// after the window is closed and Stop cleanup has run.
 func (window *Window) Run() int {
 	go func() {
 		err := window.loop()
@@ -142,10 +159,6 @@ func (window *Window) loop() error {
 }
 
 func (window *Window) start() {
-	if window.running {
-		return
-	}
-	window.running = true
 	if window.commands.Start != nil {
 		window.commands.Start()
 	}
@@ -155,10 +168,9 @@ func (window *Window) stop() {
 	if window.commands.Stop != nil {
 		window.commands.Stop()
 	}
-	window.running = false
 }
 
-// Present stores the newest analysed frame and state, then requests a redraw.
+// Present stores the newest analysed frame and queues any confirmed screenshot.
 func (window *Window) Present(update monitor.Update) {
 	window.mu.Lock()
 	state := highestState(update.Result)
@@ -170,6 +182,22 @@ func (window *Window) Present(update monitor.Update) {
 		window.latestImage = update.Image
 		window.imageGen++
 	}
+	if update.Image != nil {
+		for _, record := range update.Events {
+			id := record.Event.EventID
+			if id == "" {
+				continue
+			}
+			if _, seen := window.seenEvents[id]; seen {
+				continue
+			}
+			window.seenEvents[id] = struct{}{}
+			window.incoming = append(window.incoming, galleryIncoming{
+				caption: fmt.Sprintf("%s %s", record.Event.TrackID, time.Now().Format("15:04:05")),
+				image:   update.Image,
+			})
+		}
+	}
 	window.mu.Unlock()
 	window.appWindow.Invalidate()
 }
@@ -208,44 +236,82 @@ func (window *Window) layout(gtx layout.Context) layout.Dimensions {
 
 	window.mu.Lock()
 	model := window.model
-	image := window.latestImage
+	frame := window.latestImage
 	gen := window.imageGen
 	pending := window.pending
+	incoming := window.incoming
+	window.incoming = nil
 	window.mu.Unlock()
 
-	hasImage := image != nil
-	if hasImage && gen != window.imageShownGen {
-		window.imageOp = paint.NewImageOp(image)
+	for i := range incoming {
+		item := &galleryItem{caption: incoming[i].caption, op: paint.NewImageOp(incoming[i].image)}
+		window.gallery = append([]*galleryItem{item}, window.gallery...)
+	}
+	if len(window.gallery) > galleryCapacity {
+		window.gallery = window.gallery[:galleryCapacity]
+	}
+
+	hasFrame := frame != nil
+	if hasFrame && gen != window.imageShownGen {
+		window.imageOp = paint.NewImageOp(frame)
 		window.imageShownGen = gen
 	}
 
+	now := time.Now()
+	for _, item := range window.gallery {
+		if item.click.Clicked(gtx) {
+			if !item.lastClick.IsZero() && now.Sub(item.lastClick) < 350*time.Millisecond {
+				window.viewing = item
+			}
+			item.lastClick = now
+		}
+	}
+	if window.viewerClose.Clicked(gtx) {
+		window.viewing = nil
+	}
+	if window.ackButton.Clicked(gtx) {
+		window.mu.Lock()
+		window.pending = nil
+		window.mu.Unlock()
+		pending = nil
+	}
+
 	content := func(gtx layout.Context) layout.Dimensions {
 		return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
 			layout.Rigid(window.layoutTabs),
 			layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
 				if window.active == 0 {
-					return window.layoutMonitor(gtx, model, hasImage)
+					return window.layoutMonitor(gtx, model, hasFrame)
 				}
 				return window.layoutSettings(gtx, model)
 			}),
 		)
 	}
 
-	if pending == nil {
+	children := []layout.StackChild{layout.Expanded(content)}
+	if window.viewing != nil {
+		children = append(children, layout.Expanded(scrim), layout.Expanded(window.layoutViewer))
+	}
+	if pending != nil {
+		record := *pending
+		children = append(children,
+			layout.Expanded(scrim),
+			layout.Stacked(func(gtx layout.Context) layout.Dimensions {
+				return layout.Center.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+					return window.layoutDialog(gtx, record)
+				})
+			}),
+		)
+	}
+	if len(children) == 1 {
 		return content(gtx)
 	}
-	return layout.Stack{}.Layout(gtx,
-		layout.Expanded(content),
-		layout.Expanded(func(gtx layout.Context) layout.Dimensions {
-			paint.FillShape(gtx.Ops, colorScrim, clip.Rect{Max: gtx.Constraints.Min}.Op())
-			return layout.Dimensions{Size: gtx.Constraints.Min}
-		}),
-		layout.Stacked(func(gtx layout.Context) layout.Dimensions {
-			return layout.Center.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
-				return window.layoutDialog(gtx, *pending)
-			})
-		}),
-	)
+	return layout.Stack{}.Layout(gtx, children...)
+}
+
+func scrim(gtx layout.Context) layout.Dimensions {
+	paint.FillShape(gtx.Ops, colorScrim, clip.Rect{Max: gtx.Constraints.Min}.Op())
+	return layout.Dimensions{Size: gtx.Constraints.Min}
 }
 
 func (window *Window) layoutTabs(gtx layout.Context) layout.Dimensions {
@@ -269,70 +335,147 @@ func (window *Window) layoutTabs(gtx layout.Context) layout.Dimensions {
 	return layout.Flex{}.Layout(gtx, children...)
 }
 
-func (window *Window) layoutMonitor(gtx layout.Context, model ViewModel, hasImage bool) layout.Dimensions {
+func (window *Window) layoutMonitor(gtx layout.Context, model ViewModel, hasFrame bool) layout.Dimensions {
 	return layout.Flex{Axis: layout.Horizontal}.Layout(gtx,
 		layout.Flexed(3, func(gtx layout.Context) layout.Dimensions {
 			return layout.UniformInset(unit.Dp(8)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
-				if !hasImage {
+				if !hasFrame {
 					return layout.Center.Layout(gtx, material.Body1(window.theme, model.ConnectionText).Layout)
 				}
 				return widget.Image{Src: window.imageOp, Fit: widget.Contain, Position: layout.Center}.Layout(gtx)
 			})
 		}),
 		layout.Flexed(2, func(gtx layout.Context) layout.Dimensions {
-			return window.layoutStatus(gtx, model)
+			return window.layoutRightPanel(gtx, model)
 		}),
 	)
 }
 
-func (window *Window) layoutStatus(gtx layout.Context, model ViewModel) layout.Dimensions {
+func (window *Window) layoutRightPanel(gtx layout.Context, model ViewModel) layout.Dimensions {
 	if window.startButton.Clicked(gtx) {
 		window.start()
 	}
 	if window.stopButton.Clicked(gtx) {
 		window.stop()
 	}
-	return layout.UniformInset(unit.Dp(12)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+	return layout.UniformInset(unit.Dp(10)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
 		return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
-			layout.Rigid(material.H6(window.theme, "运行状态").Layout),
-			layout.Rigid(material.Body1(window.theme, model.ConnectionText).Layout),
+			// Row 1: connection status and detection status on one line.
 			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
-				label := material.Body1(window.theme, model.StateText)
-				if model.Critical {
-					label.Color = colorAlert
-				}
-				return label.Layout(gtx)
+				return layout.Flex{Axis: layout.Horizontal, Alignment: layout.Middle}.Layout(gtx,
+					layout.Rigid(material.Body1(window.theme, model.ConnectionText).Layout),
+					layout.Rigid(layout.Spacer{Width: unit.Dp(16)}.Layout),
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						label := material.Body1(window.theme, model.StateText)
+						if model.Critical {
+							label.Color = colorAlert
+						}
+						return label.Layout(gtx)
+					}),
+				)
 			}),
-			layout.Rigid(material.Body1(window.theme, model.EventText).Layout),
 			layout.Rigid(layout.Spacer{Height: unit.Dp(8)}.Layout),
-			layout.Rigid(material.Button(window.theme, &window.startButton, "开始监控").Layout),
-			layout.Rigid(layout.Spacer{Height: unit.Dp(6)}.Layout),
-			layout.Rigid(material.Button(window.theme, &window.stopButton, "停止监控").Layout),
+			// Row 2: compact start/stop buttons on one line.
+			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				return layout.Flex{Axis: layout.Horizontal}.Layout(gtx,
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						return smallButton(gtx, window.theme, &window.startButton, "开始监控")
+					}),
+					layout.Rigid(layout.Spacer{Width: unit.Dp(8)}.Layout),
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						return smallButton(gtx, window.theme, &window.stopButton, "停止监控")
+					}),
+				)
+			}),
 			layout.Rigid(layout.Spacer{Height: unit.Dp(8)}.Layout),
-			layout.Rigid(material.Body2(window.theme, "红色仅表示已确认摔倒。连接异常不会触发报警。").Layout),
+			// Row 3: event text and the red-note on one line.
+			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				return layout.Flex{Axis: layout.Horizontal, Alignment: layout.Middle}.Layout(gtx,
+					layout.Rigid(material.Body1(window.theme, model.EventText).Layout),
+					layout.Rigid(layout.Spacer{Width: unit.Dp(12)}.Layout),
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						note := material.Body2(window.theme, "红色=确认摔倒")
+						note.Color = colorSubtle
+						return note.Layout(gtx)
+					}),
+				)
+			}),
+			layout.Rigid(layout.Spacer{Height: unit.Dp(8)}.Layout),
+			layout.Rigid(material.Body2(window.theme, "最近确认截图（双击看原图）").Layout),
+			layout.Rigid(layout.Spacer{Height: unit.Dp(4)}.Layout),
+			// Remaining area: 3x3 reverse-chronological screenshot gallery.
+			layout.Flexed(1, window.layoutGallery),
 		)
 	})
 }
 
-func (window *Window) layoutSettings(gtx layout.Context, model ViewModel) layout.Dimensions {
-	return layout.UniformInset(unit.Dp(12)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+func smallButton(gtx layout.Context, theme *material.Theme, click *widget.Clickable, label string) layout.Dimensions {
+	button := material.Button(theme, click, label)
+	button.Inset = layout.Inset{Top: unit.Dp(4), Bottom: unit.Dp(4), Left: unit.Dp(10), Right: unit.Dp(10)}
+	button.TextSize = unit.Sp(13)
+	return button.Layout(gtx)
+}
+
+func (window *Window) layoutGallery(gtx layout.Context) layout.Dimensions {
+	rows := make([]layout.FlexChild, 0, 3)
+	for r := 0; r < 3; r++ {
+		r := r
+		rows = append(rows, layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
+			cols := make([]layout.FlexChild, 0, 3)
+			for c := 0; c < 3; c++ {
+				index := r*3 + c
+				cols = append(cols, layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
+					if index < len(window.gallery) {
+						return window.layoutCell(gtx, window.gallery[index])
+					}
+					return layout.Dimensions{Size: gtx.Constraints.Min}
+				}))
+			}
+			return layout.Flex{Axis: layout.Horizontal}.Layout(gtx, cols...)
+		}))
+	}
+	return layout.Flex{Axis: layout.Vertical}.Layout(gtx, rows...)
+}
+
+func (window *Window) layoutCell(gtx layout.Context, item *galleryItem) layout.Dimensions {
+	return item.click.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+		return layout.UniformInset(unit.Dp(3)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+			return widget.Image{Src: item.op, Fit: widget.Contain, Position: layout.Center}.Layout(gtx)
+		})
+	})
+}
+
+func (window *Window) layoutViewer(gtx layout.Context) layout.Dimensions {
+	item := window.viewing
+	if item == nil {
+		return layout.Dimensions{Size: gtx.Constraints.Min}
+	}
+	return layout.UniformInset(unit.Dp(24)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
 		return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
-			layout.Rigid(material.H6(window.theme, "来源与运行依赖（只读，不显示 RTSP 地址或密码）").Layout),
-			layout.Rigid(material.Body1(window.theme, model.SettingsSummary).Layout),
-			layout.Rigid(material.Body1(window.theme, "模型 SHA-256："+shortHash(window.settings.ModelSHA256)).Layout),
-			layout.Rigid(material.Body1(window.theme, "运行依赖："+window.settings.RuntimeSummary).Layout),
-			layout.Rigid(material.Body1(window.theme, "事件参数："+window.settings.EventSummary).Layout),
-			layout.Rigid(material.Body2(window.theme, "参数在配置文件中维护；修改后请停止并重新开始监控。").Layout),
+			layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+				return layout.Flex{Axis: layout.Horizontal}.Layout(gtx,
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						caption := material.Body1(window.theme, item.caption)
+						caption.Color = colorSurface
+						return caption.Layout(gtx)
+					}),
+					layout.Flexed(1, layout.Spacer{}.Layout),
+					layout.Rigid(func(gtx layout.Context) layout.Dimensions {
+						return smallButton(gtx, window.theme, &window.viewerClose, "关闭")
+					}),
+				)
+			}),
+			layout.Rigid(layout.Spacer{Height: unit.Dp(8)}.Layout),
+			layout.Flexed(1, func(gtx layout.Context) layout.Dimensions {
+				return layout.Center.Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+					return widget.Image{Src: item.op, Fit: widget.Contain, Position: layout.Center}.Layout(gtx)
+				})
+			}),
 		)
 	})
 }
 
 func (window *Window) layoutDialog(gtx layout.Context, record alert.Record) layout.Dimensions {
-	if window.ackButton.Clicked(gtx) {
-		window.mu.Lock()
-		window.pending = nil
-		window.mu.Unlock()
-	}
 	width := gtx.Dp(420)
 	if width > gtx.Constraints.Max.X {
 		width = gtx.Constraints.Max.X
@@ -364,6 +507,19 @@ func (window *Window) layoutDialog(gtx layout.Context, record alert.Record) layo
 	)
 }
 
+func (window *Window) layoutSettings(gtx layout.Context, model ViewModel) layout.Dimensions {
+	return layout.UniformInset(unit.Dp(12)).Layout(gtx, func(gtx layout.Context) layout.Dimensions {
+		return layout.Flex{Axis: layout.Vertical}.Layout(gtx,
+			layout.Rigid(material.H6(window.theme, "来源与运行依赖（只读，不显示 RTSP 地址或密码）").Layout),
+			layout.Rigid(material.Body1(window.theme, model.SettingsSummary).Layout),
+			layout.Rigid(material.Body1(window.theme, "模型 SHA-256："+shortHash(window.settings.ModelSHA256)).Layout),
+			layout.Rigid(material.Body1(window.theme, "运行依赖："+window.settings.RuntimeSummary).Layout),
+			layout.Rigid(material.Body1(window.theme, "事件参数："+window.settings.EventSummary).Layout),
+			layout.Rigid(material.Body2(window.theme, "参数在配置文件中维护；修改后请停止并重新开始监控。").Layout),
+		)
+	})
+}
+
 func highestState(result fall.FrameResult) fall.State {
 	state := fall.Normal
 	for _, person := range result.People {