feat(tui): panel focus with click, scroll, and keyboard

Click any panel (Monitors, Logs, Detail) to focus it — accent border
follows focus. Mouse wheel scrolls the focused panel.

Keyboard: l toggles log panel focus. Arrow keys scroll logs when
focused, navigate monitors when not. Esc returns focus to monitors.

Log sidebar now supports scroll offset — tracks position across
renders without a viewport. Mouse wheel scrolls 3 lines, keyboard
scrolls 1.

internal/tui/tab_logs_sidebar.go

@@ -60,7 +60,7 @@ func (m Model) viewLogsSidebar(width, maxLines int) string {
 
 	sidebarStyle := lipgloss.NewStyle().Width(width).MaxWidth(width)
 
-	var lines []string
+	var all []string
 	for _, line := range logs {
 		if strings.TrimSpace(line) == "" {
 			continue
@@ -68,11 +68,43 @@ func (m Model) viewLogsSidebar(width, maxLines int) string {
 		if m.logFilterImportant && !isImportantLog(classifyLog(line)) {
 			continue
 		}
-		lines = append(lines, m.renderCompactLogLine(line, width))
+		all = append(all, m.renderCompactLogLine(line, width))
-		if maxLines > 0 && len(lines) >= maxLines {
-			break
-		}
 	}
 
-	return sidebarStyle.Render(strings.Join(lines, "\n"))
+	start := m.logScrollOffset
+	if start > len(all) {
+		start = len(all)
+	}
+	end := start + maxLines
+	if end > len(all) {
+		end = len(all)
+	}
+	visible := all[start:end]
+
+	return sidebarStyle.Render(strings.Join(visible, "\n"))
+}
+
+func (m *Model) scrollLogs(delta int) {
+	logs := m.engine.GetLogs()
+	total := 0
+	for _, line := range logs {
+		if strings.TrimSpace(line) == "" {
+			continue
+		}
+		if m.logFilterImportant && !isImportantLog(classifyLog(line)) {
+			continue
+		}
+		total++
+	}
+
+	m.logScrollOffset += delta
+	if m.logScrollOffset < 0 {
+		m.logScrollOffset = 0
+	}
+	if m.logScrollOffset > total-1 {
+		m.logScrollOffset = total - 1
+	}
+	if m.logScrollOffset < 0 {
+		m.logScrollOffset = 0
+	}
 }

internal/tui/tui.go

@@ -96,6 +96,12 @@ const (
 	sectionUsers  = 2
 )
 
+const (
+	panelMonitors = 0
+	panelLogs     = 1
+	panelDetail   = 2
+)
+
 type sessionState int
 
 const (
@@ -124,6 +130,8 @@ type Model struct {
 	termWidth       int
 	termHeight      int
 	contentWidth    int
+	focusedPanel    int
+	logScrollOffset int
 	editID          int
 	editToken       string
 

internal/tui/update.go

@@ -274,6 +274,15 @@ func (m *Model) handleMouse(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
 		return m, nil
 	}
 
+	if m.currentTab == tabMonitors && m.focusedPanel == panelLogs {
+		if msg.Button == tea.MouseButtonWheelUp {
+			m.scrollLogs(-3)
+		} else {
+			m.scrollLogs(3)
+		}
+		return m, nil
+	}
+
 	listLen := m.currentListLen()
 	if msg.Button == tea.MouseButtonWheelUp {
 		if m.cursor > 0 {
@@ -291,6 +300,9 @@ func (m *Model) handleMouse(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
 		}
 	}
 	m.syncSelectedID()
+	if m.detailOpen && m.currentTab == tabMonitors && m.cursor < len(m.sites) {
+		return m, m.loadDetailCmd(m.sites[m.cursor].ID)
+	}
 	return m, nil
 }
 
@@ -526,11 +538,26 @@ func (m *Model) handleDashboardKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		if m.currentTab == tabSettings {
 			m.switchSettingsSection(m.settingsSection - 1)
 		}
-	case "right", "l":
+	case "right":
 		if m.currentTab == tabSettings {
 			m.switchSettingsSection(m.settingsSection + 1)
 		}
+	case "l":
+		switch m.currentTab {
+		case tabSettings:
+			m.switchSettingsSection(m.settingsSection + 1)
+		case tabMonitors:
+			if m.focusedPanel == panelLogs {
+				m.focusedPanel = panelMonitors
+			} else {
+				m.focusedPanel = panelLogs
+			}
+		}
 	case "up", "k":
+		if m.currentTab == tabMonitors && m.focusedPanel == panelLogs {
+			m.scrollLogs(-1)
+			return m, nil
+		}
 		if m.cursor > 0 {
 			m.cursor--
 			if m.cursor < m.tableOffset {
@@ -542,6 +569,10 @@ func (m *Model) handleDashboardKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 			}
 		}
 	case "down", "j":
+		if m.currentTab == tabMonitors && m.focusedPanel == panelLogs {
+			m.scrollLogs(1)
+			return m, nil
+		}
 		max := m.currentListLen() - 1
 		if m.cursor < max {
 			m.cursor++
@@ -600,10 +631,14 @@ func (m *Model) handleDashboardKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 			m.state = stateAlertDetail
 		}
 	case "esc":
-		if m.currentTab == tabMonitors && m.detailOpen {
+		if m.currentTab == tabMonitors {
+			if m.focusedPanel != panelMonitors {
+				m.focusedPanel = panelMonitors
+			} else if m.detailOpen {
 				m.detailOpen = false
 				m.recalcLayout()
 			}
+		}
 	case "h":
 		if m.detailOpen && m.currentTab == tabMonitors && m.cursor < len(m.sites) {
 			site := m.sites[m.cursor]
@@ -750,6 +785,18 @@ func (m *Model) handleClick(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
 		}
 	}
 
+	if m.currentTab == tabMonitors {
+		if m.zones.Get("panel-monitors").InBounds(msg) {
+			m.focusedPanel = panelMonitors
+		} else if m.zones.Get("panel-logs").InBounds(msg) {
+			m.focusedPanel = panelLogs
+			return m, nil
+		} else if m.detailOpen && m.zones.Get("panel-detail").InBounds(msg) {
+			m.focusedPanel = panelDetail
+			return m, nil
+		}
+	}
+
 	prefix, listLen := m.currentZonePrefix()
 	end := m.tableOffset + m.maxTableRows
 	if end > listLen {
@@ -759,6 +806,9 @@ func (m *Model) handleClick(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
 		if m.zones.Get(fmt.Sprintf("%s-%d", prefix, i)).InBounds(msg) {
 			m.cursor = i
 			m.syncSelectedID()
+			if m.detailOpen && m.currentTab == tabMonitors {
+				return m, m.loadDetailCmd(m.sites[m.cursor].ID)
+			}
 			return m, nil
 		}
 	}

internal/tui/view_dashboard.go

@@ -159,9 +159,9 @@ func (m Model) viewDashboard() string {
 			rightW := availW - leftW
 			m.contentWidth = leftW - 2
 			monitors := m.viewSitesTab()
-			monPanel := m.titledPanel("Monitors", monitors, leftW, !m.detailOpen)
+			monPanel := m.zones.Mark("panel-monitors", m.titledPanel("Monitors", monitors, leftW, m.focusedPanel == panelMonitors))
 			sidebarContent := m.viewLogsSidebar(rightW-2, m.maxTableRows)
-			logPanel := m.titledPanel("Logs", sidebarContent, rightW, false)
+			logPanel := m.zones.Mark("panel-logs", m.titledPanel("Logs", sidebarContent, rightW, m.focusedPanel == panelLogs))
 			top := lipgloss.JoinHorizontal(lipgloss.Top, monPanel, logPanel)
 			if m.detailOpen {
 				site := ""
@@ -169,7 +169,7 @@ func (m Model) viewDashboard() string {
 					site = m.sites[m.cursor].Name
 				}
 				detail := m.viewDetailInline(availW - 2)
-				detailPanel := m.titledPanel(site, detail, availW, true)
+				detailPanel := m.zones.Mark("panel-detail", m.titledPanel(site, detail, availW, m.focusedPanel == panelDetail))
 				content = top + "\n" + detailPanel
 			} else {
 				content = top
@@ -178,14 +178,14 @@ func (m Model) viewDashboard() string {
 			m.contentWidth = m.termWidth - 2
 			monitors := m.viewSitesTab()
 			availW := m.termWidth - chromePadH
-			monPanel := m.titledPanel("Monitors", monitors, availW, !m.detailOpen)
+			monPanel := m.zones.Mark("panel-monitors", m.titledPanel("Monitors", monitors, availW, m.focusedPanel == panelMonitors))
 			if m.detailOpen {
 				site := ""
 				if m.cursor < len(m.sites) {
 					site = m.sites[m.cursor].Name
 				}
 				detail := m.viewDetailInline(availW - 2)
-				detailPanel := m.titledPanel(site, detail, availW, true)
+				detailPanel := m.zones.Mark("panel-detail", m.titledPanel(site, detail, availW, m.focusedPanel == panelDetail))
 				content = monPanel + "\n" + detailPanel
 			} else {
 				content = monPanel
@@ -303,10 +303,12 @@ func (m Model) renderFooter(stats dashboardStats) string {
 	var keys string
 	switch m.currentTab {
 	case tabMonitors:
-		if m.detailOpen {
+		if m.focusedPanel == panelLogs {
-			keys = "[i]Close [Enter]Expand [h]History [s]SLA [e]Edit [↑/↓]Select [T]Theme [q]Quit"
+			keys = "[↑/↓]Scroll [l/Esc]Back [T]Theme [q]Quit"
+		} else if m.detailOpen {
+			keys = "[i]Close [Enter]Expand [h]History [s]SLA [e]Edit [l]Logs [↑/↓]Select [T]Theme [q]Quit"
 		} else {
-			keys = "[/]Filter [i]Info [Enter]Detail [n]New [e]Edit [d]Del [p]Pause [T]Theme [Tab]Switch [q]Quit"
+			keys = "[/]Filter [i]Info [Enter]Detail [n]New [e]Edit [d]Del [l]Logs [T]Theme [Tab]Switch [q]Quit"
 		}
 	case tabMaint:
 		keys = "[n]New [x]End [d]Del [T]Theme [Tab]Switch [q]Quit"