优化: dirs 面板增加"全部"选项

index 0 为"全部"合并显示所有目录的会话

internal/app.go

@@ -177,10 +177,11 @@ func (m *Model) moveHistoryDir(dir int) {
 		return
 	}
 	m.history.DirCursor += dir
+	maxDir := len(m.history.Projects) // 含"全部"
 	if m.history.DirCursor < 0 {
-		m.history.DirCursor = len(m.history.Projects) - 1
+		m.history.DirCursor = maxDir - 1
 	}
-	if m.history.DirCursor >= len(m.history.Projects) {
+	if m.history.DirCursor >= maxDir {
 		m.history.DirCursor = 0
 	}
 	m.history.SessCursor = 0
@@ -201,8 +202,20 @@ func (m *Model) moveHistorySess(dir int) {
 }
 
 func (m *Model) currentSessions() []*Session {
-	if m.history.DirCursor < len(m.history.Projects) {
+	if len(m.history.Projects) == 0 {
-		return m.history.Projects[m.history.DirCursor].Sessions
+		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 idx < len(m.history.Projects) {
+		return m.history.Projects[idx].Sessions
 	}
 	return nil
 }
@@ -559,14 +572,33 @@ func (m *Model) renderDirPanel(w int) string {
 	b.WriteString(style.DetailTitle.Render(" dirs "))
 	b.WriteString("\n")
 
+	// "全部" 行 (index 0)
+	totalSess := 0
+	for _, pd := range m.history.Projects {
+		totalSess += len(pd.Sessions)
+	}
+	cur := " "
+	if m.history.DirCursor == 0 {
+		cur = "▸"
+	}
+	if m.history.DirCursor == 0 && m.history.FocusPanel == 0 {
+		line := fmt.Sprintf("%s 全部 (%d)", cur, totalSess)
+		b.WriteString(style.SelStyle.Width(innerW).Render(line))
+	} else {
+		cnt := style.DirCountStyle.Render(fmt.Sprintf("(%d)", totalSess))
+		line := fmt.Sprintf("%s 全部 %s", cur, cnt)
+		b.WriteString(style.NormStyle.Render(line))
+	}
+	b.WriteString("`n")
+
 	for i, pd := range m.history.Projects {
 		cur := " "
-		if i == m.history.DirCursor {
+		if m.history.DirCursor == i+1 {
 			cur = "▸"
 		}
 		name := truncateByWidth(pd.DirShort, max(8, innerW-8))
 
-		if i == m.history.DirCursor && m.history.FocusPanel == 0 {
+		if m.history.DirCursor == i+1 && m.history.FocusPanel == 0 {
 			line := fmt.Sprintf("%s %s (%d)", cur, name, len(pd.Sessions))
 			b.WriteString(style.SelStyle.Width(innerW).Render(line))
 		} else {
@@ -574,7 +606,7 @@ func (m *Model) renderDirPanel(w int) string {
 			line := fmt.Sprintf("%s %s %s", cur, name, cnt)
 			b.WriteString(style.NormStyle.Render(line))
 		}
-		b.WriteString("\n")
+		b.WriteString("`n")
 	}
 
 	return lipgloss.NewStyle().