test(kit): tighten quiet-role alignment probe; document quiet paint tradeoffs

cim_suite/core/ui/kit/delegate.py

@@ -150,7 +150,8 @@ class InstrumentDelegate(QStyledItemDelegate):
         if show_affordance:
             self._paint_hover_chip(painter, rect, t)
 
-        # Content.
+        # Content. QUIET_ROLE diverts TEXT cells to the manual path; icons/checkboxes
+        # are not supported on quiet cells (empty-slot cells carry neither).
         if kind in (CellKind.NUMERIC, CellKind.IDENTIFIER) or index.data(QUIET_ROLE):
             # Fix 5: dim manual-path content for disabled cells (spec §5.1: 40%).
             # Save/restore scopes the opacity change so the edge bar is unaffected.
@@ -190,7 +191,7 @@ class InstrumentDelegate(QStyledItemDelegate):
         # Fix 2: accept QColor as well as QBrush for ForegroundRole.
         fg = _as_brush(index.data(Qt.ItemDataRole.ForegroundRole))
         if index.data(QUIET_ROLE):
-            pen = qcolor(t.faint)
+            pen = qcolor(t.faint)  # quiet wins over ForegroundRole: de-emphasis is unconditional
         elif fg is not None:
             pen = fg.color()
         else:

tests/core/kit/test_delegate_paint.py

@@ -255,5 +255,6 @@ def test_quiet_role_combines_with_numeric_kind(qtbot, render_cell):
     delegate.set_column_kind(0, CellKind.NUMERIC)
     table.item(0, 0).setData(QUIET_ROLE, True)
     image = render_cell(delegate, table.model().index(0, 0))
-    _left, right = _ink_span(image, current().faint, tol=40)
-    assert right is not None and right > 95      # still right-aligned mono
+    left, right = _ink_span(image, current().faint, tol=40)
+    assert right is not None and right > 95      # hugs the right edge
+    assert left > 60                             # nothing drawn at the left