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.

tests/gui/test_assign_zls.py

@@ -18,15 +18,24 @@ from otko.views.dialogs.assign_zls import (  # noqa: E402
 
 def _project_with_section() -> Project:
     return Project(
-        ndm=2, ndf=3,
+        ndm=2,
+        ndf=3,
         nodes=[
             Node(id=1, coords=(0, 0, 0)),
             Node(id=2, coords=(0, 0, 0)),
         ],
-        sections=[ElasticSection(
-            id=3, name="MK", E=30000, A=200, Iz=6667, Iy=6667,
-            G=12000, J=100,
-        )],
+        sections=[
+            ElasticSection(
+                id=3,
+                name="MK",
+                E=30000,
+                A=200,
+                Iz=6667,
+                Iy=6667,
+                G=12000,
+                J=100,
+            )
+        ],
     )
 
 
@@ -43,7 +52,8 @@ def test_dialog_lists_project_sections(qtbot) -> None:  # type: ignore[no-untype
 @pytest.mark.gui
 def test_dialog_disabled_when_no_sections(qtbot) -> None:  # type: ignore[no-untyped-def]
     p = Project(
-        ndm=2, ndf=3,
+        ndm=2,
+        ndf=3,
         nodes=[Node(id=1, coords=(0, 0, 0)), Node(id=2, coords=(0, 0, 0))],
     )
     dlg = AssignZeroLengthSectionDialog(p, (1, 2))