feat(tui): move detail panel from bottom overlay to right side

Restructure dashboard from [Monitors 70% | Logs 30%] to
[Monitors 45% | Detail 55%] master-detail layout. Detail panel
now sits beside the monitor list instead of below it, keeping
dashboard context visible during inspection.

- Detail panel renders in horizontal split (right of monitors)
- Logs sidebar removed; `l` key opens fullscreen logs directly
- recalcLayout no longer subtracts detail height from table rows
- Remove unused renderCompactLogLine/viewLogsSidebar (Phase 4 recreates)

internal/tui/tab_logs_sidebar.go

@@ -2,76 +2,8 @@ package tui
 
 import (
 	"strings"
-
-	"gitea.lerkolabs.com/lerkolabs/uptop/internal/models"
-	"github.com/charmbracelet/lipgloss"
 )
 
-func (m Model) renderCompactLogLine(entry models.LogEntry, maxW int) string {
-	sev := classifyLog(entry.Message)
-
-	var tag string
-	switch sev {
-	case severityDown:
-		tag = m.st.dangerStyle.Render("▼")
-	case severityUp:
-		tag = m.st.specialStyle.Render("▲")
-	case severityWarn:
-		tag = m.st.warnStyle.Render("◆")
-	case severitySystem:
-		tag = m.st.titleStyle.Render("●")
-	default:
-		tag = m.st.subtleStyle.Render("·")
-	}
-
-	ts := entry.CreatedAt.Local().Format("01/02 15:04")
-
-	msg := entry.Message
-	msg = strings.TrimPrefix(msg, "Monitor ")
-	msg = strings.TrimPrefix(msg, "Push ")
-
-	prefixW := len(ts) + 4
-	msgW := maxW - prefixW
-	if msgW < 5 {
-		msgW = 5
-	}
-	msg = limitStr(msg, msgW)
-
-	return " " + m.st.subtleStyle.Render(ts) + " " + tag + " " + msg
-}
-
-func (m Model) viewLogsSidebar(width, maxLines int) string {
-	logs := m.engine.GetLogs()
-	if len(logs) == 0 {
-		return m.st.subtleStyle.Render("  No logs yet")
-	}
-
-	sidebarStyle := lipgloss.NewStyle().Width(width).MaxWidth(width)
-
-	var all []string
-	for _, entry := range logs {
-		if strings.TrimSpace(entry.Message) == "" {
-			continue
-		}
-		if m.logFilterImportant && !isImportantLog(classifyLog(entry.Message)) {
-			continue
-		}
-		all = append(all, m.renderCompactLogLine(entry, width))
-	}
-
-	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