fix: take the aareDB transmission as the fraction aarecommon >= 0.7 declares

CI resolves aarecommon 0.7.3, where DataCollectionParameters.transmission
is a 0-to-1 fraction that rejects anything above 1.0 (the percent sheets
are converted inside AareDB >= 0.83, which main already requires). The
divide-by-100 from the earlier 'percentage' fix therefore failed the
model test on CI and would have turned 20% into 0.2% at the beamline.
Pass the fraction through and pin aarecommon>=0.7.3 so the older int
percentage model can no longer be installed; relock.

Also satisfy the diff typecheck gate: basedpyright only counts instance
variables assigned in __init__, so the Database/User toggle widgets are
created there and _build_source_toggle only lays them out.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

src/aare/gui/panels/scan_settings_panel.py

@@ -86,15 +86,13 @@ class SampleParameters:
         params = None if sample is None else sample.aaredb_params
         if params is None:
             return cls()
-        # aareDB holds transmission as a percentage (DataCollectionParameters
-        # .transmission is an int, 0 to 100); everything here works in the
-        # 0-to-1 fraction the scan requests are built from.
-        transmission = _spreadsheet_float(params, "transmission")
-        if transmission is not None:
-            transmission = transmission / 100.0
+        # DataCollectionParameters.transmission is the 0-to-1 fraction the
+        # scan requests use (aarecommon >= 0.7 rejects anything above 1.0 by
+        # design; the percent spreadsheets humans write are converted inside
+        # AareDB). No scaling here: dividing again would turn 20% into 0.2%.
         return cls(
             resolution_a=_spreadsheet_float(params, "targetresolution"),
-            transmission=transmission,
+            transmission=_spreadsheet_float(params, "transmission"),
             total_angle_deg=_spreadsheet_float(params, "totalangle"),
             image_angle_deg=_spreadsheet_float(params, "oscillation"),
             exp_time_s=_spreadsheet_float(params, "exposure"),
@@ -158,6 +156,11 @@ class ScanSettingsPanel(QWidget):
         outer = QVBoxLayout(self)
         outer.setContentsMargins(0, 0, 0, 0)
         outer.setSpacing(0)
+        # Created here, not in _build_source_toggle: basedpyright only counts
+        # instance variables assigned in __init__ as initialized.
+        self._database_radio = QRadioButton("Database values", self)
+        self._user_radio = QRadioButton("User values", self)
+        self._source_group = QButtonGroup(self)
         outer.addWidget(self._build_source_toggle())
 
         grid_host = QWidget(self)
@@ -242,10 +245,7 @@ class ScanSettingsPanel(QWidget):
         container = QWidget(self)
         row = QHBoxLayout(container)
         row.setContentsMargins(0, 0, 0, 0)
-        self._database_radio = QRadioButton("Database values", container)
-        self._user_radio = QRadioButton("User values", container)
         self._database_radio.setChecked(True)
-        self._source_group = QButtonGroup(container)
         self._source_group.addButton(self._database_radio)
         self._source_group.addButton(self._user_radio)
         # One connection is enough: toggled fires on both directions.