fix(tui): correct delete confirm labels, normalize help text

Delete confirmation dialog used wrong magic numbers for entity kind
mapping — maintenance windows showed as "alert", settings deletions
showed as "monitor". Now uses tab/section constants to match correctly.

Also: consistent [q/Esc] Back across all views (detail inline, logs,
SLA, history headers), extract detailKeys(), remove dead maxSections
variable, add nodes empty state hint, use models.Status constants in
siteOrder, delete orphaned theme.png.

internal/tui/format.go

@@ -49,13 +49,13 @@ func siteOrder(s models.Site) int {
 		return 3
 	}
 	switch s.Status {
-	case "DOWN", "SSL EXP":
+	case models.StatusDown, models.StatusSSLExp:
 		return 0
-	case "STALE":
+	case models.StatusStale:
 		return 1
-	case "LATE":
+	case models.StatusLate:
 		return 1
-	case "PENDING":
+	case models.StatusPending:
 		return 3
 	default:
 		return 2

internal/tui/tab_logs.go

@@ -81,7 +81,7 @@ func (m Model) viewLogsFullscreen() string {
 		filterLabel = m.st.subtleStyle.Render("[f] Important only")
 	}
 	countLabel := m.st.subtleStyle.Render(fmt.Sprintf("%d/%d", m.logShown, m.logTotal))
-	footer := m.divider() + "\n  " + m.st.subtleStyle.Render("[Esc] Back") + "  " + filterLabel + "  " + countLabel
+	footer := m.divider() + "\n  " + m.st.subtleStyle.Render("[q/Esc] Back") + "  " + filterLabel + "  " + countLabel
 
 	m.logViewport.Width = m.termWidth - chromePadH
 	m.logViewport.Height = m.termHeight - 8

internal/tui/tab_nodes.go

@@ -8,7 +8,7 @@ import (
 
 func (m Model) viewNodesTab() string {
 	if len(m.nodes) == 0 {
-		return m.emptyState("No probe nodes connected.", "")
+		return m.emptyState("No probe nodes connected.", "Probes auto-register on connection.")
 	}
 
 	var headers []string

internal/tui/tab_settings.go

@@ -7,16 +7,10 @@ import (
 )
 
 func (m Model) viewSettingsTab() string {
-	maxSections := 2
-	if m.isAdmin {
-		maxSections = 3
-	}
-
 	sections := []string{"Alerts", "Nodes"}
 	if m.isAdmin {
 		sections = append(sections, "Users")
 	}
-	_ = maxSections
 
 	var tabs []string
 	for i, name := range sections {

internal/tui/view_dashboard.go

@@ -48,12 +48,15 @@ func (m Model) View() string {
 	case stateConfirmDelete:
 		kind := "monitor"
 		switch m.deleteTab {
-		case 1:
-			kind = "alert"
-		case 4:
+		case tabMaint:
 			kind = "maintenance window"
-		case 5:
-			kind = "user"
+		case tabSettings:
+			switch m.settingsSection {
+			case sectionAlerts:
+				kind = "alert"
+			case sectionUsers:
+				kind = "user"
+			}
 		}
 		msg := m.st.dangerStyle.Render(fmt.Sprintf("Delete %s \"%s\"?", kind, m.deleteName))
 		hint := m.st.subtleStyle.Render("[y] Confirm  [n] Cancel")

internal/tui/view_detail_inline.go

@@ -57,8 +57,7 @@ func (m Model) viewDetailTwoCol(site models.Site, hist monitor.SiteHistory, widt
 		b.WriteString(l + " " + divChar + " " + r + "\n")
 	}
 
-	keys := m.st.subtleStyle.Render("[h] History  [s] SLA  [e] Edit  [esc] Close")
-	b.WriteString("  " + keys + "\n")
+	b.WriteString("  " + m.detailKeys() + "\n")
 
 	return lipgloss.NewStyle().Width(width).MaxWidth(width).Render(b.String())
 }
@@ -293,12 +292,15 @@ func (m Model) viewDetailSingleCol(site models.Site, hist monitor.SiteHistory, w
 		b.WriteString("  " + m.st.subtleStyle.Render("30d") + " " + m.uptimeTimeline(m.detailDailyDays, timelineW) + "\n")
 	}
 
-	keys := m.st.subtleStyle.Render("[h] History  [s] SLA  [e] Edit  [esc] Close")
-	b.WriteString("  " + keys + "\n")
+	b.WriteString("  " + m.detailKeys() + "\n")
 
 	return lipgloss.NewStyle().Width(width).MaxWidth(width).Render(b.String())
 }
 
+func (m Model) detailKeys() string {
+	return m.st.subtleStyle.Render("[h] History  [s] SLA  [e] Edit  [q/Esc] Back")
+}
+
 func (m Model) fmtStatusWord(status string) string {
 	switch status {
 	case "DOWN":

internal/tui/view_history.go

@@ -152,7 +152,7 @@ func (m Model) viewHistoryPanel() string {
 	var b strings.Builder
 
 	header := "  " + m.st.titleStyle.Render("STATE HISTORY: "+m.historySiteName)
-	header += "  " + m.st.subtleStyle.Render("[q] Back")
+	header += "  " + m.st.subtleStyle.Render("[q/Esc] Back")
 	b.WriteString(header + "\n")
 
 	divWidth := m.dividerWidth()

internal/tui/view_sla.go

@@ -25,7 +25,7 @@ func (m Model) viewSLAPanel() string {
 	var b strings.Builder
 
 	header := "  " + m.st.titleStyle.Render("SLA REPORT: "+m.slaSiteName)
-	header += "  " + m.st.subtleStyle.Render("[q] Back")
+	header += "  " + m.st.subtleStyle.Render("[q/Esc] Back")
 	b.WriteString(header + "\n")
 	b.WriteString(m.divider() + "\n")