refactor(backend): clean up package re-exports, settings model properties, and unused signals

src/pygui/backend/models/__init__.py

@@ -1,19 +0,0 @@
-# ===== Models Sub-package =====
-from pygui.backend.models.data_model import TemperatureTableModel
-from pygui.backend.models.frame import Frame
-from pygui.backend.models.frame_player import FramePlayer, frames_from_wafer_data
-from pygui.backend.models.frame_stats import Stats, compute_stats
-from pygui.backend.models.sensor_editor import SensorEditor
-from pygui.backend.models.session_model import SessionModel, SessionUpdate
-from pygui.backend.models.stability_detector import StabilityDetector
-from pygui.backend.models.threshold_classifier import ThresholdConfig, classify, resolve_bounds
-
-__all__ = [
-    "Frame", "FramePlayer", "frames_from_wafer_data",
-    "Stats", "compute_stats",
-    "SessionModel", "SessionUpdate",
-    "TemperatureTableModel",
-    "SensorEditor",
-    "ThresholdConfig", "classify", "resolve_bounds",
-    "StabilityDetector",
-]

src/pygui/backend/models/data_model.py

@@ -55,7 +55,7 @@ class TemperatureTableModel(QAbstractTableModel):
         # Column 0 = row index, columns 1..N = sensor values
         return self._col_count + 1
 
-    def data(self, index: Any, role: int = ...) -> Any:
+    def data(self, index: Any, role: int = ...) -> Any:  # type: ignore[assignment]
         if not index.isValid():
             return None
 
@@ -73,7 +73,7 @@ class TemperatureTableModel(QAbstractTableModel):
         return None
 
     def headerData(
-        self, section: int, orientation: int, role: int = ...
+        self, section: int, orientation: Qt.Orientation, role: int = ...  # type: ignore[assignment]
     ) -> Any:
         if role != Qt.ItemDataRole.DisplayRole:
             return None

src/pygui/backend/models/frame_player.py

@@ -4,7 +4,7 @@ from pygui.backend.models.frame import Frame
 from pygui.backend.wafer.zwafer_models import ZWaferData
 
 
-def frames_from_wafer_data(data: ZWaferData, records) -> list[Frame]:
+def frames_from_wafer_data(data: ZWaferData | None, records) -> list[Frame]:
     """Build Frames from parsed DataRecords (records = list[DataRecord].)"""
     return [Frame(seq=i, time=r.time, values=list(r.values)) for i, r in enumerate(records)]