Improve sessions dialog

pkg/tui/dialog/session_browser.go

@@ -47,6 +47,10 @@ type sessionBrowserDialog struct {
 	keyMap     sessionBrowserKeyMap
 	openedAt   time.Time // when dialog was opened, for stable time display
 	starFilter int       // 0 = all, 1 = starred only, 2 = unstarred only
+
+	// Double-click detection
+	lastClickTime  time.Time
+	lastClickIndex int
 }
 
 // NewSessionBrowserDialog creates a new session browser dialog
@@ -106,6 +110,26 @@ func (d *sessionBrowserDialog) Update(msg tea.Msg) (layout.Model, tea.Cmd) {
 		d.filterSessions()
 		return d, cmd
 
+	case tea.MouseClickMsg:
+		// Scrollbar clicks already handled above; this handles list item clicks
+		if msg.Button == tea.MouseLeft {
+			if idx := d.mouseYToSessionIndex(msg.Y); idx >= 0 {
+				now := time.Now()
+				if idx == d.lastClickIndex && now.Sub(d.lastClickTime) < styles.DoubleClickThreshold {
+					d.selected = idx
+					d.lastClickTime = time.Time{}
+					return d, tea.Sequence(
+						core.CmdHandler(CloseDialogMsg{}),
+						core.CmdHandler(messages.LoadSessionMsg{SessionID: d.filtered[d.selected].ID}),
+					)
+				}
+				d.selected = idx
+				d.lastClickTime = now
+				d.lastClickIndex = idx
+			}
+		}
+		return d, nil
+
 	case tea.KeyPressMsg:
 		if cmd := HandleQuit(msg); cmd != nil {
 			return d, cmd
@@ -216,6 +240,24 @@ func (d *sessionBrowserDialog) filterSessions() {
 	d.scrollview.SetScrollOffset(0)
 }
 
+// mouseYToSessionIndex converts a mouse Y position to a session index in the filtered list.
+// Returns -1 if the position is not on a session.
+func (d *sessionBrowserDialog) mouseYToSessionIndex(y int) int {
+	dialogRow, _ := d.Position()
+	visLines := d.scrollview.VisibleHeight()
+	listStartY := dialogRow + sessionBrowserListStartY
+
+	if y < listStartY || y >= listStartY+visLines {
+		return -1
+	}
+	lineInView := y - listStartY
+	idx := d.scrollview.ScrollOffset() + lineInView
+	if idx < 0 || idx >= len(d.filtered) {
+		return -1
+	}
+	return idx
+}
+
 func (d *sessionBrowserDialog) dialogSize() (dialogWidth, maxHeight, contentWidth int) {
 	dialogWidth = max(min(d.Width()*85/100, 96), 60)
 	maxHeight = min(d.Height()*70/100, 30)
@@ -317,7 +359,7 @@ func (d *sessionBrowserDialog) renderSession(sess session.Summary, selected bool
 		title = "Untitled"
 	}
 
-	suffix := fmt.Sprintf(" (%d) • %s", sess.NumMessages, d.timeAgo(sess.CreatedAt))
+	suffix := fmt.Sprintf(" • (%d msg) • %s", sess.NumMessages, d.timeAgo(sess.CreatedAt))
 
 	starWidth := 3
 	maxTitleLen := max(1, maxWidth-len(suffix)-starWidth)

pkg/tui/dialog/session_browser_test.go

@@ -202,3 +202,106 @@ func TestSessionBrowserScrolling(t *testing.T) {
 	expectedTitle := fmt.Sprintf("Session %d", d.selected+1)
 	require.Contains(t, view, expectedTitle, "view should contain selected session")
 }
+
+func TestSessionBrowserMouseClickSelectsSession(t *testing.T) {
+	sessions := []session.Summary{
+		{ID: "1", Title: "Session 1", CreatedAt: time.Now()},
+		{ID: "2", Title: "Session 2", CreatedAt: time.Now()},
+		{ID: "3", Title: "Session 3", CreatedAt: time.Now()},
+	}
+
+	dialog := NewSessionBrowserDialog(sessions)
+	d := dialog.(*sessionBrowserDialog)
+	d.Init()
+	d.Update(tea.WindowSizeMsg{Width: 100, Height: 50})
+
+	// Initially selected should be 0
+	require.Equal(t, 0, d.selected)
+
+	// Get the dialog position to calculate where to click
+	dialogRow, _ := d.Position()
+	listStartY := dialogRow + sessionBrowserListStartY
+
+	// Single-click on the second session (line index 1)
+	clickMsg := tea.MouseClickMsg{
+		X:      20,
+		Y:      listStartY + 1,
+		Button: tea.MouseLeft,
+	}
+	updated, cmd := d.Update(clickMsg)
+	d = updated.(*sessionBrowserDialog)
+
+	// Selection should have moved to session 2
+	require.Equal(t, 1, d.selected, "single click should select session")
+	// Single click should not produce a load command
+	require.Nil(t, cmd, "single click should not trigger load")
+
+	// Single-click on the third session
+	clickMsg = tea.MouseClickMsg{
+		X:      20,
+		Y:      listStartY + 2,
+		Button: tea.MouseLeft,
+	}
+	updated, cmd = d.Update(clickMsg)
+	d = updated.(*sessionBrowserDialog)
+
+	require.Equal(t, 2, d.selected, "single click should select third session")
+	require.Nil(t, cmd, "single click on different session should not trigger load")
+}
+
+func TestSessionBrowserDoubleClickOpensSession(t *testing.T) {
+	sessions := []session.Summary{
+		{ID: "sess-1", Title: "Session 1", CreatedAt: time.Now()},
+		{ID: "sess-2", Title: "Session 2", CreatedAt: time.Now()},
+		{ID: "sess-3", Title: "Session 3", CreatedAt: time.Now()},
+	}
+
+	dialog := NewSessionBrowserDialog(sessions)
+	d := dialog.(*sessionBrowserDialog)
+	d.Init()
+	d.Update(tea.WindowSizeMsg{Width: 100, Height: 50})
+
+	dialogRow, _ := d.Position()
+	listStartY := dialogRow + sessionBrowserListStartY
+
+	// First click selects
+	clickMsg := tea.MouseClickMsg{
+		X:      20,
+		Y:      listStartY + 1,
+		Button: tea.MouseLeft,
+	}
+	updated, _ := d.Update(clickMsg)
+	d = updated.(*sessionBrowserDialog)
+	require.Equal(t, 1, d.selected)
+
+	// Second click on the same item (double-click) should trigger load
+	updated, cmd := d.Update(clickMsg)
+	d = updated.(*sessionBrowserDialog)
+	require.Equal(t, 1, d.selected, "selection should stay on double-clicked session")
+	require.NotNil(t, cmd, "double-click should produce a command to load the session")
+}
+
+func TestSessionBrowserClickOutsideListIgnored(t *testing.T) {
+	sessions := []session.Summary{
+		{ID: "1", Title: "Session 1", CreatedAt: time.Now()},
+		{ID: "2", Title: "Session 2", CreatedAt: time.Now()},
+	}
+
+	dialog := NewSessionBrowserDialog(sessions)
+	d := dialog.(*sessionBrowserDialog)
+	d.Init()
+	d.Update(tea.WindowSizeMsg{Width: 100, Height: 50})
+
+	// Click way outside the list area
+	clickMsg := tea.MouseClickMsg{
+		X:      5,
+		Y:      0,
+		Button: tea.MouseLeft,
+	}
+	updated, cmd := d.Update(clickMsg)
+	d = updated.(*sessionBrowserDialog)
+
+	// Selection should remain at 0
+	require.Equal(t, 0, d.selected, "click outside list should not change selection")
+	require.Nil(t, cmd, "click outside list should not produce a command")
+}