新增: 历史对话收藏功能，重构 Tab 导航与平台检查

internal/app.go

@@ -19,6 +19,8 @@ import (
 	"u-tabs/internal/style"
 )
 
+var isWindows = runtime.GOOS == "windows"
+
 // Model 主模型
 type Model struct {
 	activeGroup int
@@ -29,8 +31,10 @@ type Model struct {
 	height      int
 	launched    string
 	history     HistoryState
-	pendingCmd  string // Linux: 退出后执行的命令
+	pendingCmd  string
 	update      UpdateState
+	wsFocus     int // workspace 焦点列: 0=tabs 1=list
+	wsTabCur   int // tabs 列光标 (0..len(Groups), 最后一个是历史入口)
 }
 
 func NewModel() *Model {
@@ -45,11 +49,6 @@ func (m *Model) Init() tea.Cmd {
 	return CheckUpdateCmd()
 }
 
-// totalTabs 包含 HISTORY 的总 Tab 数
-func (m *Model) totalTabs() int {
-	return len(Groups) + 1
-}
-
 func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	switch msg := msg.(type) {
 	case tea.KeyPressMsg:
@@ -61,6 +60,9 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		m.history.Projects = msg.Projects
 		m.history.Loaded = true
 		m.history.Scanning = false
+		if m.history.Favorites == nil {
+			m.history.Favorites = loadFavorites()
+		}
 		total := 0
 		for _, pd := range msg.Projects {
 			total += len(pd.Sessions)
@@ -96,7 +98,6 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 // --- 按键分发 ---
 
 func (m *Model) handleKey(s string) (*Model, tea.Cmd) {
-	// 全局按键
 	switch s {
 	case "q", "ctrl+c":
 		return m, tea.Quit
@@ -107,36 +108,28 @@ func (m *Model) handleKey(s string) (*Model, tea.Cmd) {
 		}
 	}
 
-	// 数字键跳转 Tab
+	// Tab 快捷切换: 1=工作空间 2=历史对话
-	if len(s) == 1 && s[0] >= '1' && s[0] <= '9' {
+	if s == "1" {
-		idx, _ := strconv.Atoi(s)
+		if m.IsHistoryTab() {
-		if idx <= m.totalTabs() {
+			m.activeGroup = 0
-			m.activeGroup = idx - 1
+		m.resetCursor()
-			m.cursor = 0
+			m.wsFocus = 1
-			m.inputBuf = ""
+		}
+		return m, nil
+	}
+	if s == "2" {
+		if !m.IsHistoryTab() {
+			m.activeGroup = len(Groups) // HISTORY
+		m.resetCursor()
+			m.wsFocus = 1
 			return m, m.onTabSwitch()
 		}
+		return m, nil
 	}
 
-	// HISTORY Tab: tab/left/right 用于面板切换
 	if m.IsHistoryTab() {
 		return m.handleHistoryKey(s)
 	}
-
-	// Workspace Tab 按键
-	switch s {
-	case "tab", "right", "l":
-		m.activeGroup = (m.activeGroup + 1) % m.totalTabs()
-		m.cursor = 0
-		m.inputBuf = ""
-		return m, m.onTabSwitch()
-	case "shift+tab", "left", "h":
-		m.activeGroup = (m.activeGroup - 1 + m.totalTabs()) % m.totalTabs()
-		m.cursor = 0
-		m.inputBuf = ""
-		return m, m.onTabSwitch()
-	}
-
 	return m.handleWorkspaceKey(s)
 }
 
@@ -148,21 +141,51 @@ func (m *Model) onTabSwitch() tea.Cmd {
 	return nil
 }
 
-// --- Workspace Tab 按键 ---
+// --- Workspace 按键 ---
 
 func (m *Model) handleWorkspaceKey(s string) (*Model, tea.Cmd) {
 	switch s {
+	case "left", "h":
+		if m.wsFocus > 0 {
+			m.wsFocus = 0
+		}
+	case "right", "l":
+		if m.wsFocus < 1 {
+			m.wsFocus = 1
+		}
+	case "tab", "shift+tab":
+		m.wsFocus = (m.wsFocus + 1) % 2
 	case "up", "k":
+		if m.wsFocus == 0 {
+			m.moveGroupCursor(-1)
+		} else {
 			m.moveCursor(-1)
+		}
 	case "down", "j":
+		if m.wsFocus == 0 {
+			m.moveGroupCursor(1)
+		} else {
 			m.moveCursor(1)
-	case " ":
+		}
-		m.toggleMultiSelect()
 	case "enter":
 		if m.inputBuf != "" {
 			return m.launchByInput()
 		}
+		if m.wsFocus == 0 {
+			if m.wsTabCur >= len(Groups) {
+				m.activeGroup = len(Groups)
+				m.resetCursor()
+				return m, m.onTabSwitch()
+			}
+			m.activeGroup = m.wsTabCur
+			m.wsFocus = 1
+		} else {
 			return m.launchSelected()
+		}
+	case " ":
+		if m.wsFocus == 1 {
+			m.toggleMultiSelect()
+		}
 	default:
 		if len(s) == 1 && s[0] >= '0' && s[0] <= '9' {
 			m.inputBuf += s
@@ -171,7 +194,20 @@ func (m *Model) handleWorkspaceKey(s string) (*Model, tea.Cmd) {
 	return m, nil
 }
 
-// --- HISTORY Tab 按键 ---
+func (m *Model) resetCursor() {
+	m.cursor = 0
+	m.inputBuf = ""
+}
+
+func (m *Model) moveGroupCursor(dir int) {
+	total := len(Groups) + 1 // 含历史入口
+	m.wsTabCur = (m.wsTabCur + dir + total) % total
+	if m.wsTabCur < len(Groups) {
+		m.activeGroup = m.wsTabCur
+	}
+	m.resetCursor()
+}
+// --- HISTORY 按键 ---
 
 func (m *Model) handleHistoryKey(s string) (*Model, tea.Cmd) {
 	switch s {
@@ -197,7 +233,13 @@ func (m *Model) handleHistoryKey(s string) (*Model, tea.Cmd) {
 		}
 	case "enter":
 		if m.history.FocusPanel == 0 {
-			// 在左栏按 enter 切到中栏
+			if m.history.DirCursor == len(m.history.Projects)+2 {
+				// 回到工作空间
+				m.activeGroup = 0
+			m.resetCursor()
+				m.wsTabCur = 0
+				m.wsFocus = 1
+			}
 			m.history.FocusPanel = 1
 		} else {
 			return m.resumeSelected()
@@ -207,6 +249,8 @@ func (m *Model) handleHistoryKey(s string) (*Model, tea.Cmd) {
 	case "r", "f5":
 		m.history.Scanning = true
 		return m, ScanSessionsCmd()
+	case "f":
+		m.toggleFavorite()
 	}
 	return m, nil
 }
@@ -216,7 +260,7 @@ func (m *Model) moveHistoryDir(dir int) {
 		return
 	}
 	m.history.DirCursor += dir
-	maxDir := len(m.history.Projects) + 1 // 含"全部"
+	maxDir := len(m.history.Projects) + 3 // 全部 + 收藏 + 项目 + 回到工作空间
 	if m.history.DirCursor < 0 {
 		m.history.DirCursor = maxDir - 1
 	}
@@ -241,62 +285,78 @@ func (m *Model) moveHistorySess(dir int) {
 }
 
 func (m *Model) currentSessions() []*Session {
-	if len(m.history.Projects) == 0 {
-		return nil
-	}
 	if m.history.DirCursor == 0 {
-		// "全部" — 合并所有目录的会话
 		var all []*Session
 		for _, pd := range m.history.Projects {
 			all = append(all, pd.Sessions...)
 		}
 		return all
 	}
-	idx := m.history.DirCursor - 1
+	if m.history.DirCursor == 1 {
-	if idx < len(m.history.Projects) {
+		// 收藏过滤
-		return m.history.Projects[idx].Sessions
+		return collectFavorites(m.history.Projects, m.history.Favorites)
 	}
+	idx := m.history.DirCursor - 2
+	if idx >= len(m.history.Projects) {
 		return nil
 	}
+	return m.history.Projects[idx].Sessions
+}
 
 func (m *Model) currentSession() *Session {
 	sessions := m.currentSessions()
-	if len(sessions) == 0 || m.history.SessCursor >= len(sessions) {
+	if len(sessions) == 0 {
 		return nil
 	}
+	if m.history.SessCursor >= len(sessions) {
+		m.history.SessCursor = len(sessions) - 1
+	}
 	return sessions[m.history.SessCursor]
 }
 
 func (m *Model) resumeSelected() (*Model, tea.Cmd) {
 	s := m.currentSession()
-	if s == nil {
+	if isWindows {
-		return m, nil
-	}
-	if runtime.GOOS == "windows" {
 		go resumeSession(s)
 	} else {
-		cwd := s.Cwd
 		title := s.CustomTitle
 		if title == "" {
 			title = s.ID[:8]
 		}
-		m.pendingCmd = fmt.Sprintf(`printf '\033]0;resume: %s\007' && echo "=== Resuming: %s ===" && cd "%s" && claude -r %s`, title, title, cwd, s.ID)
+		m.pendingCmd = fmt.Sprintf(`printf '\033]0;resume: %s\007' && echo "=== Resuming: %s ===" && cd "%s" && claude -r %s`, title, title, s.Cwd, s.ID)
 	}
 	m.launched = "resume: " + s.CustomTitle
 	return m, nil
 }
 
+// currentDirCwd 取当前选中目录路径，"全部" 返回空
+func (m *Model) currentDirCwd() string {
+	if m.history.DirCursor <= 1 {
+		return ""
+	}
+	idx := m.history.DirCursor - 2
+	if idx >= len(m.history.Projects) {
+		return ""
+	}
+	return m.history.Projects[idx].Dir
+}
+
 func (m *Model) newSessionFromHistory() (*Model, tea.Cmd) {
 	s := m.currentSession()
-	if s == nil {
+	cwd := ""
+	if s != nil {
+		cwd = s.Cwd
+	} else {
+		cwd = m.currentDirCwd()
+	}
+	if cwd == "" {
 		return m, nil
 	}
-	cwd := s.Cwd
+	if isWindows {
-	if runtime.GOOS == "windows" {
 		cwd = strings.ReplaceAll(cwd, "/", "\\")
 	}
 	title := filepath.Base(cwd) + " - new"
-	if runtime.GOOS == "windows" {
+	if isWindows {
 		script := fmt.Sprintf(`$Host.UI.RawUI.WindowTitle = "%s"
 		Write-Host "=== New Session @ %s ===" -ForegroundColor Cyan
 		cd "%s"
@@ -309,7 +369,6 @@ claude --permission-mode bypassPermissions`, title, cwd, cwd)
 	return m, nil
 }
 
-
 // --- AI 摘要 ---
 
 func (m *Model) applySummary(sessionID, summary string, completed, pending []string) {
@@ -341,6 +400,23 @@ func (m *Model) nextSummaryCmd() tea.Cmd {
 	}
 	return nil
 }
+
+func (m *Model) toggleFavorite() {
+	if m.history.Favorites == nil {
+		m.history.Favorites = loadFavorites()
+	}
+	s := m.currentSession()
+	if s == nil {
+		return
+	}
+	if m.history.Favorites[s.ID] {
+		delete(m.history.Favorites, s.ID)
+	} else {
+		m.history.Favorites[s.ID] = true
+	}
+	saveFavorites(m.history.Favorites)
+}
+
 // --- Workspace 光标 ---
 
 func (m *Model) moveCursor(dir int) {
@@ -415,6 +491,36 @@ func (m *Model) View() tea.View {
 	return v
 }
 
+// renderTabBar 顶部两个主 tab：工作空间 / 历史对话
+func (m *Model) renderTabBar() string {
+	var b strings.Builder
+	b.WriteString(style.TitleStyle.Render(" u-tabs v" + Version + " "))
+	sep := style.TabSep.Render(" │ ")
+
+	// Tab 1: 工作空间
+	wsLabel := " 1 工作空间 "
+	if !m.IsHistoryTab() {
+		b.WriteString(lipgloss.NewStyle().
+			Bold(true).Background(style.BgPanel).Foreground(style.Accent).
+			Render(wsLabel))
+	} else {
+		b.WriteString(style.TabInactiveStyle.Render(wsLabel))
+	}
+
+	// Tab 2: 历史对话
+	b.WriteString(sep)
+	histLabel := " 2 历史对话 "
+	if m.IsHistoryTab() {
+		b.WriteString(lipgloss.NewStyle().
+			Bold(true).Background(style.BgPanel).Foreground(style.Cyan).
+			Render(histLabel))
+	} else {
+		b.WriteString(style.TabInactiveStyle.Render(histLabel))
+	}
+
+	return b.String()
+}
+
 func (m *Model) render() string {
 	if m.width == 0 {
 		return "loading..."
@@ -422,42 +528,8 @@ func (m *Model) render() string {
 
 	var b strings.Builder
 
-	// ── header: title + tabs ──
+	// ── header: tab 导航条 + separator ──
-	b.WriteString(style.TitleStyle.Render(" u-tabs v" + Version + " "))
+	b.WriteString(m.renderTabBar())
-	sep := style.TabSep.Render(" | ")
-
-	// Workspace Tabs
-	for i, g := range Groups {
-		if i > 0 {
-			b.WriteString(sep)
-		}
-		label := fmt.Sprintf(" %s %s ", g.Label, g.Desc)
-		if i == m.activeGroup {
-			gs, ok := style.GroupStyles[g.Label]
-			if ok {
-				b.WriteString(lipgloss.NewStyle().
-					Bold(true).Background(style.BgPanel).Foreground(gs.GetForeground()).
-					Render(label))
-			} else {
-				b.WriteString(style.TabActiveStyle.Render(label))
-			}
-		} else {
-			b.WriteString(style.TabInactiveStyle.Render(label))
-		}
-	}
-
-	// HISTORY Tab
-	b.WriteString(sep)
-	histLabel := " HISTORY 历史 "
-	if m.IsHistoryTab() {
-		gs := style.GroupStyles["HISTORY"]
-		b.WriteString(lipgloss.NewStyle().
-			Bold(true).Background(style.BgPanel).Foreground(gs.GetForeground()).
-			Render(histLabel))
-	} else {
-		b.WriteString(style.TabInactiveStyle.Render(histLabel))
-	}
-
 	b.WriteString("\n")
 	b.WriteString(lipgloss.NewStyle().Foreground(style.BgPanel).Render(strings.Repeat("─", m.width)))
 	b.WriteString("\n")
@@ -478,7 +550,6 @@ func (m *Model) render() string {
 		b.WriteString(lipgloss.NewStyle().Foreground(style.Accent).Render(fmt.Sprintf(" ✓ %s", m.launched)))
 		m.launched = ""
 	}
-		// update status
 	if m.update.Done {
 		b.WriteString(lipgloss.NewStyle().Foreground(style.Success).Bold(true).
 			Render(fmt.Sprintf(" updated to v%s, restart to apply", m.update.NewVersion)))
@@ -507,45 +578,118 @@ func (m *Model) renderHelp() []string {
 	if m.IsHistoryTab() {
 		return []string{
 			m.fmtHelp("j/k", "sel"),
-			m.fmtHelp("Tab", "→panel"),
+			m.fmtHelp("←→", "panel"),
 			m.fmtHelp("Enter", "resume"),
+			m.fmtHelp("f", "star"),
 			m.fmtHelp("n", "new"),
-				m.fmtHelp("1-"+fmt.Sprintf("%d", m.totalTabs()), "tab"),
+			m.fmtHelp("1", "workspace"),
 			m.fmtHelp("r/F5", "refresh"),
 			m.fmtHelp("q", "quit"),
 		}
 	}
 	return []string{
+		m.fmtHelp("←→", "col"),
 		m.fmtHelp("j/k", "sel"),
 		m.fmtHelp("Enter", "run"),
 		m.fmtHelp("Space", "multi"),
-		m.fmtHelp("Tab", "group"),
+		m.fmtHelp("2", "history"),
 		m.fmtHelp("q", "quit"),
 	}
 }
 
-// --- Workspace 渲染 ---
+// --- Workspace 三栏渲染 ---
 
 func (m *Model) renderWorkspace() string {
-	listW := max(42, min(65, m.width*55/100))
-	detailW := max(30, m.width-listW-3)
-
 	g := Groups[m.activeGroup]
-	gs, _ := style.GroupStyles[g.Label]
 	svcs := WorkspacesByGroup(g.Label)
 	if len(svcs) == 0 {
 		return style.SubtitleStyle.Render("  empty")
 	}
 
-	// 预留 header(2) + footer(2)，面板边框+标题占 3 行
+	avail := m.width - 8
-	availH := max(3, m.height-4-3)
+	tabW := max(14, min(20, avail*18/100))
-	start, end := viewport(m.cursor, len(svcs), availH)
+	listW := max(30, avail*45/100)
+	detailW := avail - tabW - listW
 
-	// 左栏: 列表
+	tabCw := tabW - 2
-	var left strings.Builder
+	listCw := listW - 2
-	innerW := listW - 4
+	detailCw := detailW - 2
+
+	listH := max(3, m.height-7)
+
+	tabLines := m.tabsColumnLines(tabCw, listH-1)
+	svcLines := m.wsListLines(g, svcs, listCw, listH-1)
+	detailLines := m.wsDetailLines(svcs, detailCw, listH-1)
+
+	maxRows := min(listH-1, max(max(len(tabLines), len(svcLines)), len(detailLines)))
+
+	tabBorderFg := style.BgPanel
+	if m.wsFocus == 0 {
+		tabBorderFg = style.Accent
+	}
+	listBorderFg := style.BgPanel
+	if m.wsFocus == 1 {
+		listBorderFg = style.Accent
+	}
+
+	panelSty := lipgloss.NewStyle().Border(lipgloss.RoundedBorder())
+
+	tabBox := panelSty.BorderForeground(tabBorderFg).Width(tabW).Render(
+		style.DetailTitle.Render("tabs") + "\n" + padLinesTo(tabLines, tabCw, maxRows))
+	listBox := panelSty.BorderForeground(listBorderFg).Width(listW).Render(
+		style.DetailTitle.Render(g.Label) + "\n" + padLinesTo(svcLines, listCw, maxRows))
+	detailBox := panelSty.BorderForeground(style.BgPanel).Width(detailW).Render(
+		style.DetailTitle.Render("detail") + "\n" + padLinesTo(detailLines, detailCw, maxRows))
+
+	return lipgloss.JoinHorizontal(lipgloss.Top, tabBox, " ", listBox, " ", detailBox)
+}
+
+// tabsColumnLines 左侧 tabs 列（工作空间分组 + 历史入口）
+func (m *Model) tabsColumnLines(w, listH int) []string {
+	var lines []string
+	total := len(Groups) + 1 // 含历史入口
+	start, end := viewport(m.wsTabCur, total, listH)
+
+	focused := m.wsFocus == 0
+
+	for i := start; i < end; i++ {
+		if i == len(Groups) {
+			renderNavEntry(&lines, w, "历史对话", "#7dcfff", m.wsTabCur == i, focused)
+			continue
+		}
+
+		g := Groups[i]
+		label := g.Label
+		gs := style.GroupStyles[g.Label]
+		isActive := m.wsTabCur == i
+		if isActive {
+			line := " ▸ " + label
+			line = padRightByWidth(truncateByWidth(line, w), w)
+			if focused && gs.GetForeground() != (lipgloss.Color("")) {
+				sty := lipgloss.NewStyle().Foreground(style.BgDark).Background(gs.GetForeground()).Bold(true)
+				lines = append(lines, sty.Render(line))
+			} else if gs.GetForeground() != (lipgloss.Color("")) {
+				sty := lipgloss.NewStyle().Foreground(gs.GetForeground()).Bold(true)
+				lines = append(lines, sty.Render(line))
+			} else {
+				lines = append(lines, style.SelStyle.Render(line))
+			}
+		} else {
+			line := "   " + label
+			line = padRightByWidth(truncateByWidth(line, w), w)
+			if gs.GetForeground() != (lipgloss.Color("")) {
+				lines = append(lines, gs.Render(line))
+			} else {
+				lines = append(lines, style.NormStyle.Render(line))
+			}
+		}
+	}
+	return lines
+}
+
+func (m *Model) wsListLines(g Group, svcs []Workspace, w, listH int) []string {
+	start, end := viewport(m.cursor, len(svcs), listH)
 
-	// 计算 title 最大宽度用于对齐
 	maxTitleW := 0
 	for _, ws := range svcs {
 		if tw := stringWidth(ws.Title); tw > maxTitleW {
@@ -553,6 +697,7 @@ func (m *Model) renderWorkspace() string {
 		}
 	}
 
+	var lines []string
 	for i := start; i < end; i++ {
 		ws := svcs[i]
 		cur := " "
@@ -567,42 +712,40 @@ func (m *Model) renderWorkspace() string {
 		paddedTitle := padRightByWidth(ws.Title, maxTitleW)
 
 		if i == m.cursor {
-			// 选中行：纯文本，让 SelStyle 统一着色
 			prefix := cur + " " + mark + " " + fmt.Sprintf("%02d", ws.N) + " "
-			remainW := max(10, innerW-len(prefix))
+			remainW := max(10, w-stringWidth(prefix))
 			text := truncateByWidth(paddedTitle+"  "+ws.Prompt, remainW)
-			left.WriteString(style.SelStyle.Width(innerW).Render(prefix + text))
+			sty := style.SelStyle
+			if m.wsFocus != 1 {
+				sty = lipgloss.NewStyle().Foreground(style.Accent).Bold(true)
+			}
+			lines = append(lines, sty.Render(padRightByWidth(truncateByWidth(prefix+text, w), w)))
 		} else {
-			// 非选中行：子样式着色
 			markStr := " "
 			if m.selected[ws.Index] {
 				markStr = style.MarkStyle.Render("✓")
 			}
 			num := style.NumStyle.Render(fmt.Sprintf("%02d", ws.N))
 			prefix := cur + " " + markStr + " " + num + " "
-			remainW := max(10, innerW-lipgloss.Width(prefix))
+			remainW := max(10, w-stringWidth(prefix))
 			text := truncateByWidth(paddedTitle+"  "+ws.Prompt, remainW)
-			left.WriteString(style.NormStyle.Render(prefix + text))
+			lines = append(lines, style.NormStyle.Render(padRightByWidth(truncateByWidth(prefix+text, w), w)))
 		}
-		left.WriteString("\n")
+	}
+	return lines
 }
 
-	groupHeader := gs.Render(fmt.Sprintf(" %s · %d ", g.Label, len(svcs)))
+func (m *Model) wsDetailLines(svcs []Workspace, w, listH int) []string {
-	listBox := lipgloss.NewStyle().
+	if m.cursor >= len(svcs) {
-		Border(lipgloss.NormalBorder()).
+		return []string{lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth(" ← select to view", w))}
-		BorderForeground(style.BgPanel).
+	}
-		Width(listW).
-		Padding(0, 1).
-		Render(groupHeader + "\n" + left.String())
 
-	// 右栏: 详情
-	var right strings.Builder
-	if m.cursor < len(svcs) {
 	ws := svcs[m.cursor]
+	sepSty := lipgloss.NewStyle().Foreground(style.BgPanel)
+	var lines []string
 
-		right.WriteString(style.DetailTitle.Render(" detail "))
+	lines = append(lines, style.DetailTitle.Render(fitWidth(" "+ws.Title, w)))
-		right.WriteString(lipgloss.NewStyle().Foreground(style.BgPanel).Render(strings.Repeat("─", detailW-10)))
+	lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
-		right.WriteString("\n\n")
 
 	rows := []struct {
 		key string
@@ -616,35 +759,23 @@ func (m *Model) renderWorkspace() string {
 		{"deploy", ws.Deploy, style.DeployStyle},
 	}
 	for _, r := range rows {
-			right.WriteString("  ")
+		line := fmt.Sprintf("  %-6s %s", r.key, r.sty.Render(r.val))
-			right.WriteString(style.KeyStyle.Render(r.key))
+		lines = append(lines, style.NormStyle.Render(fitWidth(line, w)))
-			right.WriteString("  ")
-			right.WriteString(r.sty.Render(r.val))
-			right.WriteString("\n")
 	}
 
-		right.WriteString("\n")
+	lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
-		right.WriteString(lipgloss.NewStyle().Foreground(style.BgPanel).Render("  " + strings.Repeat("─", detailW-6)))
+
-		right.WriteString("\n")
 	hintCmd := "wt"
-			if runtime.GOOS != "windows" {
+	if !isWindows {
 		hintCmd = "bash"
 	}
-			right.WriteString(lipgloss.NewStyle().Foreground(style.Accent).Italic(true).Render("  $ "+hintCmd+" → CC @"+ws.Title))
+	lines = append(lines, lipgloss.NewStyle().Foreground(style.Accent).Italic(true).Render(fitWidth("  $ "+hintCmd+" → CC @"+ws.Title, w)))
-		right.WriteString("\n")
+	lines = append(lines, lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth("  [Enter]start  [Space]multi", w)))
-		right.WriteString(lipgloss.NewStyle().Foreground(style.Dim).Render("  [Enter]start  [Space]multi"))
+
-	} else {
+	if len(lines) > listH {
-		right.WriteString(lipgloss.NewStyle().Foreground(style.Dim).Render(" ← select to view"))
+		lines = lines[:listH]
 	}
-
+	return lines
-	detailBox := lipgloss.NewStyle().
-		Border(lipgloss.NormalBorder()).
-		BorderForeground(style.BgPanel).
-		Width(detailW).
-		Padding(0, 1).
-		Render(right.String())
-
-	return lipgloss.JoinHorizontal(lipgloss.Left, listBox, " ", detailBox)
 }
 
 // --- HISTORY 三栏渲染 ---
@@ -660,7 +791,6 @@ func (m *Model) renderHistory() string {
 		return style.SubtitleStyle.Render("  no sessions found")
 	}
 
-	// 三个独立面板，Width() 含边框，内容宽度 = Width - 2
 	avail := m.width - 8
 	dirW := max(18, avail*20/100)
 	sessW := max(28, avail*40/100)
@@ -675,35 +805,28 @@ func (m *Model) renderHistory() string {
 	sessLines := m.sessColumnLines(sessCw, listH-1)
 	detailLines := m.detailColumnLines(detailCw, listH-1)
 
-	// 统一高度：补空行到相同行数
 	maxRows := min(listH-1, max(max(len(dirLines), len(sessLines)), len(detailLines)))
-	padLines := func(lines []string, w int) string {
-		for len(lines) < maxRows {
-			lines = append(lines, strings.Repeat(" ", w))
-		}
-		return strings.Join(lines, "\n")
-	}
 
 	panelSty := lipgloss.NewStyle().
 		Border(lipgloss.RoundedBorder()).
 		BorderForeground(style.BgPanel)
 
 	dirBox := panelSty.Width(dirW).Render(
-		style.DetailTitle.Render("dirs") + "\n" + padLines(dirLines, dirCw))
+		style.DetailTitle.Render("dirs") + "\n" + padLinesTo(dirLines, dirCw, maxRows))
 	sessBox := panelSty.Width(sessW).Render(
-		style.DetailTitle.Render("sessions") + "\n" + padLines(sessLines, sessCw))
+		style.DetailTitle.Render("sessions") + "\n" + padLinesTo(sessLines, sessCw, maxRows))
 	detailBox := panelSty.Width(detailW).Render(
-		style.DetailTitle.Render("detail") + "\n" + padLines(detailLines, detailCw))
+		style.DetailTitle.Render("detail") + "\n" + padLinesTo(detailLines, detailCw, maxRows))
 
 	return lipgloss.JoinHorizontal(lipgloss.Top, dirBox, " ", sessBox, " ", detailBox)
 }
 
 func (m *Model) dirColumnLines(w, listH int) []string {
 	var lines []string
-	total := len(m.history.Projects) + 1
+	total := len(m.history.Projects) + 3 // 全部 + 收藏 + 项目 + 回到工作空间
 	start, end := viewport(m.history.DirCursor, total, listH)
 
-	prefixW := 3 // " " + cur(1) + " "
+	prefixW := 3
 
 	buildDirLine := func(cur, name, cnt string, selected bool) string {
 		cntW := stringWidth(cnt)
@@ -717,6 +840,7 @@ func (m *Model) dirColumnLines(w, listH int) []string {
 		return sty.Render(padRightByWidth(truncateByWidth(line, w), w))
 	}
 
+	// 0: 全部
 	if start == 0 {
 		totalSess := 0
 		for _, pd := range m.history.Projects {
@@ -730,17 +854,36 @@ func (m *Model) dirColumnLines(w, listH int) []string {
 			m.history.DirCursor == 0 && m.history.FocusPanel == 0))
 	}
 
+	// 1: 收藏
+	if start <= 1 && end > 1 {
+		favCnt := countFavorites(m.history.Projects, m.history.Favorites)
+		cur := " "
+		if m.history.DirCursor == 1 {
+			cur = "▸"
+		}
+		lines = append(lines, buildDirLine(cur, "★ 收藏", fmt.Sprintf("(%d)", favCnt),
+			m.history.DirCursor == 1 && m.history.FocusPanel == 0))
+	}
+
+	// 2..N+1: 项目目录
 	for i := 0; i < len(m.history.Projects); i++ {
-		if i+1 < start || i+1 >= end {
+		idx := i + 2
+		if idx < start || idx >= end {
 			continue
 		}
 		pd := m.history.Projects[i]
 		cur := " "
-		if m.history.DirCursor == i+1 {
+		if m.history.DirCursor == idx {
 			cur = "▸"
 		}
 		lines = append(lines, buildDirLine(cur, pd.DirShort, fmt.Sprintf("(%d)", len(pd.Sessions)),
-			m.history.DirCursor == i+1 && m.history.FocusPanel == 0))
+			m.history.DirCursor == idx && m.history.FocusPanel == 0))
+	}
+
+	// N+2: 回到工作空间入口
+	backIdx := len(m.history.Projects) + 2
+	if end > backIdx {
+		renderNavEntry(&lines, w, "工作空间", "#7aa2f7", m.history.DirCursor == backIdx, m.history.FocusPanel == 0)
 	}
 	return lines
 }
@@ -751,10 +894,9 @@ func (m *Model) sessColumnLines(w, listH int) []string {
 		return []string{style.SubtitleStyle.Render(fitWidth("  no sessions", w))}
 	}
 
-	prefixW := 15 // " " + cur(2) + timeStr(11) + " "
+	prefixW := 16
 	textW := max(8, w-prefixW)
 
-	// 预渲染每个 session 为 1~N 行
 	type sessBlock struct {
 		lines []string
 	}
@@ -768,6 +910,10 @@ func (m *Model) sessColumnLines(w, listH int) []string {
 			cur = "▸ "
 		}
 		timeStr := s.StartTime.Local().Format("01-02 15:04")
+		favMark := " "
+		if m.history.Favorites[s.ID] {
+			favMark = "★"
+		}
 		title := s.DisplayTitle()
 
 		wrapped := wrapByWidth(title, textW)
@@ -784,9 +930,9 @@ func (m *Model) sessColumnLines(w, listH int) []string {
 		for li, part := range wrapped {
 			var line string
 			if li == 0 {
-				line = fmt.Sprintf(" %s%s %s", cur, timeStr, part)
+				line = fmt.Sprintf(" %s%s%s %s", cur, timeStr, favMark, part)
 			} else {
-				line = strings.Repeat(" ", prefixW) + part
+				line = strings.Repeat(" ", prefixW+1) + part
 			}
 			blockLines = append(blockLines, sty.Render(padRightByWidth(truncateByWidth(line, w), w)))
 		}
@@ -798,7 +944,6 @@ func (m *Model) sessColumnLines(w, listH int) []string {
 		blocks = append(blocks, sessBlock{lines: blockLines})
 	}
 
-	// 按总行数做 viewport
 	startLine, endLine := viewport(curLineOffset, totalLines, listH)
 
 	var allLines []string
@@ -820,30 +965,33 @@ func (m *Model) detailColumnLines(w, listH int) []string {
 	sepSty := lipgloss.NewStyle().Foreground(style.BgPanel)
 	var lines []string
 
-	// Title
+	favPrefix := " "
-	lines = append(lines, style.DetailTitle.Render(fitWidth(" "+s.DisplayTitle(), w)))
+	if m.history.Favorites[s.ID] {
-
+		favPrefix = "★ "
-	// Separator
+	}
+	lines = append(lines, style.DetailTitle.Render(fitWidth(favPrefix+s.DisplayTitle(), w)))
 	lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
 
-	// Key-value rows
+	fav := "-"
+	if m.history.Favorites[s.ID] {
+		fav = "★"
+	}
 	kvRows := []struct{ k, v string }{
 		{"dir", s.Cwd},
 		{"time", fmt.Sprintf("%s ~ %s", s.StartTime.Local().Format("01-02 15:04"), s.EndTime.Local().Format("15:04"))},
 		{"msgs", fmt.Sprintf("%d", s.MsgCount)},
+		{"fav", fav},
 	}
 	for _, r := range kvRows {
 		line := fmt.Sprintf("  %-4s %s", r.k, r.v)
 		lines = append(lines, style.NormStyle.Render(fitWidth(line, w)))
 	}
 
-	// Summary
 	if summary := s.DisplaySummary(); summary != "" {
 		lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
 		lines = append(lines, style.SessionSummaryStyle.Render(fitWidth("  "+summary, w)))
 	}
 
-	// Completed items
 	if len(s.Completed) > 0 {
 		lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
 		lines = append(lines, lipgloss.NewStyle().Foreground(style.Success).Bold(true).Render(fitWidth(" ✓ 已完成", w)))
@@ -852,7 +1000,6 @@ func (m *Model) detailColumnLines(w, listH int) []string {
 		}
 	}
 
-	// Pending items
 	if len(s.Pending) > 0 {
 		lines = append(lines, sepSty.Render(fitWidth(strings.Repeat("─", w), w)))
 		lines = append(lines, lipgloss.NewStyle().Foreground(style.Warning).Bold(true).Render(fitWidth(" ○ 待办", w)))
@@ -861,7 +1008,6 @@ func (m *Model) detailColumnLines(w, listH int) []string {
 		}
 	}
 
-	// Hint
 	lines = append(lines, lipgloss.NewStyle().Foreground(style.Dim).Render(fitWidth("  [Enter]resume", w)))
 
 	if len(lines) > listH {
@@ -877,7 +1023,13 @@ func (m *Model) fmtHelp(key, desc string) string {
 		lipgloss.NewStyle().Foreground(style.Dim).Render(":" + desc)
 }
 
-// viewport 返回 [start, end) 区间，保证 cursor 在可见范围内
+func padLinesTo(lines []string, w, target int) string {
+	for len(lines) < target {
+		lines = append(lines, strings.Repeat(" ", w))
+	}
+	return strings.Join(lines, "\n")
+}
+
 func viewport(cursor, total, height int) (int, int) {
 	if total <= height {
 		return 0, total
@@ -898,7 +1050,6 @@ func viewport(cursor, total, height int) (int, int) {
 	return start, end
 }
 
-// stringWidth 返回字符串的终端显示宽度
 func stringWidth(s string) int {
 	w := 0
 	for _, r := range s {
@@ -907,7 +1058,6 @@ func stringWidth(s string) int {
 	return w
 }
 
-// padRightByWidth 补空格到指定视觉宽度
 func padRightByWidth(s string, targetW int) string {
 	w := stringWidth(s)
 	if w >= targetW {
@@ -916,7 +1066,6 @@ func padRightByWidth(s string, targetW int) string {
 	return s + strings.Repeat(" ", targetW-w)
 }
 
-// wrapByWidth 按显示宽度换行，返回多行文本
 func wrapByWidth(s string, maxW int) []string {
 	if maxW <= 0 || s == "" {
 		return []string{s}
@@ -930,12 +1079,28 @@ func wrapByWidth(s string, maxW int) []string {
 	return lines
 }
 
-// fitWidth 截断并填充到精确视觉宽度
 func fitWidth(s string, w int) string {
 	return padRightByWidth(truncateByWidth(s, w), w)
 }
 
-// truncateByWidth 按显示宽度截断字符串，不切断多字节字符
+func renderNavEntry(lines *[]string, w int, label string, activeFg string, isCur, focused bool) {
+	sep := lipgloss.NewStyle().Foreground(style.BgPanel).Render(fitWidth(" ─────────", w))
+	*lines = append(*lines, sep)
+	if isCur {
+		curLabel := " → " + label
+		line := padRightByWidth(truncateByWidth(curLabel, w), w)
+		if focused {
+			*lines = append(*lines, style.SelStyle.Render(line))
+		} else {
+			*lines = append(*lines, lipgloss.NewStyle().Foreground(lipgloss.Color(activeFg)).Bold(true).Render(line))
+		}
+	} else {
+		inactiveLabel := "   " + label
+		line := padRightByWidth(truncateByWidth(inactiveLabel, w), w)
+		*lines = append(*lines, lipgloss.NewStyle().Foreground(style.Dim).Render(line))
+	}
+}
+
 func truncateByWidth(s string, maxW int) string {
 	w := 0
 	for i := 0; i < len(s); {
@@ -950,7 +1115,6 @@ func truncateByWidth(s string, maxW int) string {
 	return s
 }
 
-// runeWidth 返回单个 rune 的终端显示宽度 (CJK=2, 其他=1)
 func runeWidth(r rune) int {
 	if r >= 0x1100 &&
 		(r <= 0x115F || r == 0x2329 || r == 0x232A ||
@@ -969,7 +1133,6 @@ func runeWidth(r rune) int {
 }
 
 func launchInWtWithTitle(dir, tabTitle, script string) {
-	if runtime.GOOS == "windows" {
 	encoded := encodePSCommand(script)
 	color := fmt.Sprintf("#%02X%02X%02X", randRange(80, 255), randRange(80, 255), randRange(80, 255))
 	args := []string{"-w", "0", "-d", dir, "--tabColor", color}
@@ -982,25 +1145,23 @@ func launchInWtWithTitle(dir, tabTitle, script string) {
 		log.Printf("[u-tabs] launch fail: %v", err)
 	}
 }
-}
 
 func (m *Model) LaunchWorkspace(ws Workspace) {
 	script := buildLaunchScript(ws)
-	if runtime.GOOS != "windows" {
+	if !isWindows {
 		m.pendingCmd = "cd '" + ws.Dir + "' && " + script
 		return
 	}
 	launchInWtWithTitle(ws.Dir, "", script)
 }
 
-// GetPendingCmd 返回退出后需执行的命令（Linux 用）
 func (m *Model) GetPendingCmd() string {
 	return m.pendingCmd
 }
 
 func resumeSession(s *Session) {
 	cwd := s.Cwd
-	if runtime.GOOS == "windows" {
+	if isWindows {
 		cwd = strings.ReplaceAll(s.Cwd, "/", "\\")
 	}
 	title := s.CustomTitle
@@ -1008,7 +1169,7 @@ func resumeSession(s *Session) {
 		title = s.ID[:8]
 	}
 	var script string
-	if runtime.GOOS == "windows" {
+	if isWindows {
 		script = fmt.Sprintf(`$Host.UI.RawUI.WindowTitle = "resume: %s"
 	Write-Host "=== Resuming: %s ===" -ForegroundColor Cyan
 	cd "%s"
@@ -1020,7 +1181,7 @@ claude -r %s --permission-mode bypassPermissions`, title, title, cwd, s.ID)
 }
 
 func buildLaunchScript(ws Workspace) string {
-	if runtime.GOOS == "windows" {
+	if isWindows {
 		return fmt.Sprintf(`$Host.UI.RawUI.WindowTitle = "%s"
 	Write-Host "=== %s ===" -ForegroundColor Cyan
 	Write-Host "Prompt: %s" -ForegroundColor Yellow
@@ -1046,4 +1207,3 @@ func randRange(min, max int) int {
 	n, _ := rand.Int(rand.Reader, big.NewInt(int64(max-min)))
 	return min + int(n.Int64())
 }
-

internal/history.go

@@ -88,6 +88,7 @@ type HistoryState struct {
 	FocusPanel int // 0=左栏 1=中栏
 	Loaded     bool
 	Scanning   bool
+	Favorites  map[string]bool
 }
 
 // IsHistoryTab 判断当前是否在 HISTORY Tab
@@ -203,7 +204,6 @@ func scanSessionFile(path string, sessionID string) *Session {
 	scanner := bufio.NewScanner(f)
 	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
 
-
 	lineCount := 0
 	firstMsgFound := false
 
@@ -551,3 +551,76 @@ func saveSummaryToCache(sessionID, summary string, completed, pending []string)
 	entry.Pending = pending
 	saveCache(home, cache)
 }
+
+// --- 收藏 ---
+
+func favoritesPath(home string) string {
+	return filepath.Join(home, ".u-tabs", "favorites.json")
+}
+
+func loadFavorites() map[string]bool {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return make(map[string]bool)
+	}
+	data, err := os.ReadFile(favoritesPath(home))
+	if err != nil {
+		return make(map[string]bool)
+	}
+	var ids []string
+	if json.Unmarshal(data, &ids) != nil {
+		return make(map[string]bool)
+	}
+	m := make(map[string]bool, len(ids))
+	for _, id := range ids {
+		m[id] = true
+	}
+	return m
+}
+
+func saveFavorites(favs map[string]bool) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return
+	}
+	ids := make([]string, 0, len(favs))
+	for id := range favs {
+		ids = append(ids, id)
+	}
+	data, err := json.Marshal(ids)
+	if err != nil {
+		return
+	}
+	dir := filepath.Join(home, ".u-tabs")
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		log.Printf("[u-tabs] favorites mkdir fail: %v", err)
+		return
+	}
+	if err := os.WriteFile(favoritesPath(home), data, 0o644); err != nil {
+		log.Printf("[u-tabs] favorites write fail: %v", err)
+	}
+}
+
+func countFavorites(projects []*ProjectDir, favs map[string]bool) int {
+	n := 0
+	for _, pd := range projects {
+		for _, s := range pd.Sessions {
+			if favs[s.ID] {
+				n++
+			}
+		}
+	}
+	return n
+}
+
+func collectFavorites(projects []*ProjectDir, favs map[string]bool) []*Session {
+	var out []*Session
+	for _, pd := range projects {
+		for _, s := range pd.Sessions {
+			if favs[s.ID] {
+				out = append(out, s)
+			}
+		}
+	}
+	return out
+}