feat: initial commit — uptime monitor (forked from go-upkeep)

Go-based uptime monitor with SQLite/Postgres storage, TUI dashboard,
SSH server, alerting, and clustering support.

internal/tui/tab_logs.go

@@ -0,0 +1,5 @@
+package tui
+
+func (m Model) viewLogsTab() string {
+	return "\n" + m.logViewport.View()
+}