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>

docs/ROADMAP.md

@@ -65,7 +65,10 @@ Ubuntu + NVIDIA first; `.deb` distribution (see `DECISIONS.md`).
       (no-root venv install, handles python3-venv prereq, CI-built); **`systemd --user` trigger
       modes** (`core/service.py`, `rigdoctor service mode manual|always-on|game-launch` + GUI
       Settings "Recording trigger") incl. the zero-config **game-launch watcher**
-      (`core/watcher.py`, `rigdoctor watch`). *Pending:* module-selection config during install.
+      (`core/watcher.py`, `rigdoctor watch`); and a **graphical first-run setup wizard**
+      (`gui/setup_wizard.py`): environment → dependency-bundle selection → install → recording
+      trigger → readiness, auto-launched by install.sh and re-runnable from Settings.
+      *Pending:* `.deb` packaging (next bullet).
 - [ ] `.deb` packaging (D8) declaring per-bundle deps incl. python3-pyside6 for Desktop UI
 
 ## Phase 5 — Breadth (later)