Release 1.4.1: a Bonded checkbox in the terminal tables

The config's per-terminal bonded key becomes editable in the dialog
(previously file-only, shown as a text suffix): checked, the
terminal's contacts short into one internally joined lug - the total
value stays prescribed, the per-contact split is a solve outcome.
Same-name rectangle groups seed it checked as before; unchecking one
falls back to the per-cell area share, and checking a single-contact
terminal gives it an equipotential-lug contact instead of uniform
injection. Save config... writes the flag back (removed when
unchecked - false is the schema default). With this, every
non-structural terminal option (active, values, v_oc, contact layer,
bonded, comment) is table-editable.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_dialog.py

@@ -212,8 +212,8 @@ def test_tables_split_by_role(app):
     assert dlg.pdn_sup_table.item(0, 1).text() == "src"
     assert dlg.pdn_load_table.item(0, 1).text() == "snk"
     # supplies carry R_out + V_oc columns, loads only I draw
-    assert dlg.pdn_sup_table.columnCount() == 8
-    assert dlg.pdn_load_table.columnCount() == 7
+    assert dlg.pdn_sup_table.columnCount() == 9
+    assert dlg.pdn_load_table.columnCount() == 8
 
 
 def test_table_titles_name_the_marker_layers(app):
@@ -292,10 +292,12 @@ def test_cell_flags(app):
         for col in (1, 2, last - 1):
             assert t.item(0, col).flags() & Qt.ItemIsEnabled
             assert not (t.item(0, col).flags() & Qt.ItemIsEditable)
-        # the Active column is a checkbox, not an editable cell
-        assert t.item(0, 0).flags() & Qt.ItemIsUserCheckable
-        assert not (t.item(0, 0).flags() & Qt.ItemIsEditable)
+        # Active and Bonded are checkboxes, not editable cells
+        for col in (0, last - 3):
+            assert t.item(0, col).flags() & Qt.ItemIsUserCheckable
+            assert not (t.item(0, col).flags() & Qt.ItemIsEditable)
         assert t.item(0, 0).checkState() == Qt.Checked
+        assert t.item(0, last - 3).checkState() == Qt.Unchecked
         # the Layer column holds a combo, not a text item
         assert t.cellWidget(0, last - 2) is not None
 
@@ -449,16 +451,28 @@ def test_comment_column_roundtrip(app):
     assert sel.pdn_rows[1].comment == "worst case"
 
 
-def test_bonded_flag_survives_the_table_roundtrip(app):
+def test_bonded_checkbox_seeds_and_toggles(app):
     setup = PdnSetup(rows=[
         PdnTerminalRow(name="src", role="supply", resolved="r"),
         PdnTerminalRow(name="pkg", role="load", resolved="2× rects",
                        bonded=True)], source="markers")
     dlg = _dlg(app, pdn=setup, classic_reason="x")
     _fill_pdn(dlg)
+    # seeds: the grouped load checked, the single supply not
+    bcol_s = dlg.pdn_sup_table.columnCount() - 4
+    bcol_l = dlg.pdn_load_table.columnCount() - 4
+    assert dlg.pdn_sup_table.item(0, bcol_s).checkState() == Qt.Unchecked
+    assert dlg.pdn_load_table.item(0, bcol_l).checkState() == Qt.Checked
     sel = dlg._build_selection()
     assert sel.pdn_rows[0].bonded is False
     assert sel.pdn_rows[1].bonded is True
+    # editable both ways: unbond the group (area share), bond the
+    # single supply (equipotential lug contact)
+    dlg.pdn_load_table.item(0, bcol_l).setCheckState(Qt.Unchecked)
+    dlg.pdn_sup_table.item(0, bcol_s).setCheckState(Qt.Checked)
+    sel = dlg._build_selection()
+    assert sel.pdn_rows[0].bonded is True
+    assert sel.pdn_rows[1].bonded is False
 
 
 def test_pdn_values_reach_the_selection(app):