feat(tui): 30-day uptime timeline in inline detail panel

Statuspage-style colored bar — one █ per day, colored by uptime:
green (>= 99%), yellow (>= 95%), red (< 95%), gray (no data).
30-day percentage shown to the right.

Daily breakdown computed via ComputeDailyBreakdown from state_changes
and loaded alongside detail data in loadDetailCmd. Auto-updates on
cursor move.

internal/tui/view_detail_inline.go

@@ -77,6 +77,14 @@ func (m Model) viewDetailInline(width int) string {
 		}
 	}
 
+	if len(m.detailDailyDays) > 0 && m.detailChangesSiteID == site.ID {
+		timelineW := width - 4
+		if timelineW < 20 {
+			timelineW = 20
+		}
+		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")