UX-13 P5 review: every STYLE rule has a mutation check, fuller jargon lists, Dutch wording, overlap partner test

- test_ui_text.py: key parity, placeholder parity, English-left-in-Dutch,
  semicolon, 25-word description and 2-sentence line each now fail on a
  spoiled input (the English-left check was not a real mutation).
- Jargon lists now cover the whole 'Not' column of STYLE.md section 4, in
  English, with the Dutch equivalents.
- nl.json: 'gewijzigd worden' where 'wijzigen' read as intransitive,
  'Bezig met bewaren' for the saving state, 'Metingen kloppen niet'.
- test_uimodel.py: an overlap that changes partners is named piece by piece
  (a surviving mutant of _tiling's partner check).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/test_uimodel.py

@@ -283,6 +283,13 @@ check("a gap is named: the day and the times",
       refused(rows(("07:00", "22:00", "mon-sun", 0.3),
                    ("22:00", "24:00", "mon-sun", 0.2)))
       == ("period_gap", {"day": "mon", "from": "00:00", "to": "07:00"}))
+check("an overlap that changes partners is named piece by piece: windows 1 "
+      "and 2 first, over their own times only",
+      refused(rows(("00:00", "24:00", "mon-sun", 0.3),
+                   ("06:00", "08:00", "mon-sun", 0.2),
+                   ("08:00", "10:00", "mon-sun", 0.2)))
+      == ("period_overlap", {"day": "mon", "from": "06:00", "to": "08:00",
+                             "a": 1, "b": 2}))
 check("a gap on one day only is found on that day",
       refused(rows(("00:00", "24:00", "mon-fri", 0.3),
                    ("00:00", "24:00", "sat", 0.2)))