docs(da07): refresh channels docstring and pending caveat; assert toggle precondition

cim_suite/modules/da07/ui/channels_tab.py

@@ -1,9 +1,9 @@
 """Channels tab: the per-device channel grid (Grid2) with a device selector.
 
 Shows one device's channels at a time. Live 'Input' (raw) and 'Scaled' (averaged)
-values arrive from G/F frames; the Status cell is tinted on a non-OK channel and a
-Refresh column counts seconds since the last input, tinted by staleness — mirroring
-the DA-12 Sensors tab.
+values arrive from G/F frames; the Status cell renders a §1.2 status tag (alarm-class
+rows also get the full-row alarm treatment) and a Refresh column counts seconds since
+the last input, tinted by staleness — mirroring the DA-12 Sensors tab.
 """
 
 from __future__ import annotations
@@ -281,6 +281,8 @@ class ChannelsTab(TableTab):
             return
         getattr(self._ctrl, setter)(self._device, self._channels[row].channel, value)
         self.delegate.mark_pending(row, col)
+        # row index may go stale if the grid reorders or the device switches before
+        # resolve; cosmetic only
         self._pending_writes.add((row, col))
 
     def on_check(self, row: int, col: int, checked: bool) -> None:

tests/da07/test_channels_tab_status.py

@@ -53,6 +53,7 @@ def test_active_column_is_a_toggle_and_writes(qtbot, monkeypatch):
     tab, ctrl = _tab(qtbot, channels=2)
     item = tab.table.item(0, 1)
     assert item.flags() & Qt.ItemFlag.ItemIsUserCheckable
+    assert item.checkState() == Qt.CheckState.Checked  # sim seeds channels active
     sent = []
     monkeypatch.setattr(
         ctrl, "set_channel_active", lambda dev, ch, on: sent.append((dev, ch, on))