feat(tui): QA fixes + approval Ctrl keys, workflow focus, session UUID

- gate session-list nav on idle so in-session arrows/jk don't move the list (5a)
- approval dismiss on esc + in-session 'a' reopens a pending approval (5b)
- auto-focus a newly started workflow session (was running invisibly)
- approval actions on Ctrl chords (^a/^r/^x) matching the modal; bare/Alt letters no longer approve; diff closes on ^x/esc
- steer hint in the approval modal; session UUID in the input bar
- env-gated debug logging (CORREX_TUI_LOG) with k.Alt in the key trace

apps/tui-go/internal/app/server.go

@@ -49,6 +49,7 @@ func inferCategory(t string) string {
 
 // applyServer mutates the model for a single (non-buffered) server message.
 func (m *Model) applyServer(msg protocol.ServerMessage) {
+	debugLog("SRV type=%s session=%s reason=%s", msg.Type, msg.SessionID, msg.Reason)
 	switch msg.Type {
 	case protocol.TypeSessionStarted:
 		m.onSessionStarted(msg)
@@ -244,7 +245,13 @@ func (m *Model) onSessionStarted(msg protocol.ServerMessage) {
 	if hadOptimistic || m.selectedID == "" {
 		m.selectedID = msg.SessionID
 	}
-	m.sessionEntered = true
+	if m.pendingWorkflowFocus {
+		m.selectedID = msg.SessionID
+		m.sessionEntered = true
+		m.pendingWorkflowFocus = false
+	} else {
+		m.sessionEntered = true
+	}
 }
 
 func (m *Model) onApprovalRequired(msg protocol.ServerMessage) {