chore: adopt remaining local development state

Catch-all for the intermixed residue of the unpushed otko-development
work ported into this tree: combinations/console-dock/quick-guide wiring
across commands, core, services, views and tests; repo-wide ruff-format
normalization; README/CONTRIBUTING updates; and the toolbar default
(both toolbars now open in the top area, quick guide text updated).

Splitting this further would require hunk-level surgery with low
confidence; the preceding commits in this branch isolate the
self-contained features.

README.md

@@ -82,6 +82,13 @@ views (Qt)  →  viewmodels  →  services (OpenSeesRunner, Persistence)  →  c
 Long version in [`docs/architecture.md`](docs/architecture.md),
 including the OpenSeesPy command order the runner emits.
 
+## Documentation
+
+Practical, task-first walkthroughs live in
+[`docs/QUICK_GUIDE.md`](docs/QUICK_GUIDE.md) — a cantilever build,
+modal analysis, report/script export, display units, and undo/redo.
+The full index is [`docs/README.md`](docs/README.md).
+
 ## Install (development)
 
 **Desktop GUI** (Qt, PyVista, pyqtgraph, imageio):