fix: onboarding checklist ticks for any installed module, not just text.*

The doc'd first install is debug.echo, but the Welcome onboarding
checklist only went green for a text.* capability — so a user
following the quickstart saw the box stay unchecked. Match any
non-system (non-built-in) capability instead.

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

lib/pages/welcome.dart

@@ -551,15 +551,16 @@ class _OnboardingChecklistState extends State<_OnboardingChecklist> {
         .catchError((_) => false);
     final module = hub
         .listModules()
-        // ModuleSummary.name is the module identifier
-        // (e.g. `text-extract`, with a hyphen). The Onboarding-
-        // Hinweis fragt nach einem Text-Modul — das ist auf
-        // Capability-Ebene das `text.*`-Präfix (mit Punkt).
-        // Vorher haben wir den Modul-Namen geprüft und damit
-        // nie gematcht, obwohl text-extract / text-summarize /
-        // text-translate installiert waren.
+        // "A module is installed" = any installed module providing a
+        // non-built-in capability. We match on the capability rather
+        // than the module name (which is hyphenated, e.g.
+        // `text-extract`), and accept ANY provider — so the doc'd
+        // first install of `debug.echo` ticks the box, not just
+        // `text.*`. `system.*` are built-ins, not installs.
         .then(
-          (m) => m.any((x) => x.capabilities.any((c) => c.startsWith('text.'))),
+          (m) => m.any(
+            (x) => x.capabilities.any((c) => !c.startsWith('system.')),
+          ),
         )
         .catchError((_) => false);
     final flow = hub