feat(m9): graphical first-run setup wizard — 0.26.0

The full installer experience as a GUI wizard (gui/setup_wizard.py): environment
summary → pick dependency bundles (from the catalog, grouped) → install missing
apt packages → choose recording trigger → readiness summary.

- Shown on first launch (config setup_done) and via `rigdoctor-gui --setup`;
  re-runnable from Settings → Run setup wizard.
- install.sh launches it after a fresh install when a desktop session is present.
- catalog.by_bundle() groups components; config gains setup_done.
- Tests: by_bundle grouping + wizard construction smoke.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_installer.py

@@ -2,7 +2,7 @@
 
 import unittest
 
-from rigdoctor.core import installer
+from rigdoctor.core import catalog, installer
 from rigdoctor.core.catalog import Component
 from rigdoctor.core.updates import is_newer
 
@@ -31,6 +31,13 @@ class InstallerTests(unittest.TestCase):
         rc, _ = installer.install_packages([])
         self.assertEqual(rc, 0)
 
+    def test_by_bundle_groups_all_components(self):
+        groups = catalog.by_bundle()
+        flat = [c for comps in groups.values() for c in comps]
+        self.assertEqual(len(flat), len(catalog.COMPONENTS))
+        self.assertIn("Gaming", groups)
+        self.assertIn("Diagnostics", groups)
+
 
 class UpdateTests(unittest.TestCase):
     def test_is_newer(self):