fix(welcome,store): sticky flow-completed tick, carousel position text

- the 'start a saved flow' checklist tick no longer unticks once
  the flow.completed event scrolls out of the 100-event window —
  a local sticky marker keeps it honest to its wording
- the Today carousel shows 'n/m' next to the 6-px dots so the
  position is readable without aiming at them

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/pages/welcome.dart

@@ -570,6 +570,13 @@ class _TrustRow extends StatelessWidget {
 /// onboarding needed).
 const String _kChecklistDismissedKey = 'welcome.checklist.dismissed';
 
+/// Sticky marker for "a flow has completed at least once". The live
+/// probe only sees the recent-events window (100), so a long-running
+/// hub would silently untick the step once the event scrolls out —
+/// the marker keeps the tick honest to its wording ("start a saved
+/// flow", ever), at the cost of being Studio-local.
+const String _kChecklistFlowDoneKey = 'welcome.checklist.flowCompleted';
+
 /// Live getting-started checklist. Probes the running hub for
 /// four signals that the operator has the basic loop wired up
 /// (System AI configured, MCP source added, text module
@@ -650,13 +657,18 @@ class _OnboardingChecklistState extends State<_OnboardingChecklist> {
         .then((events) => events.any((e) => e.type == 'flow.completed'))
         .catchError((_) => false);
     final results = await Future.wait([ai, mcp, module, flow]);
+    final prefs = await SharedPreferences.getInstance();
+    final flowSeen = prefs.getBool(_kChecklistFlowDoneKey) ?? false;
+    if (results[3] && !flowSeen) {
+      await prefs.setBool(_kChecklistFlowDoneKey, true);
+    }
     if (!mounted) return;
     setState(() {
       _refreshing = false;
       _aiOk = results[0];
       _mcpOk = results[1];
       _moduleOk = results[2];
-      _flowOk = results[3];
+      _flowOk = results[3] || flowSeen;
     });
   }