feat(graph): add graph tab for whole-run data

Provides a static line chart plotting multi-sensor temperature values
over time when a session file is loaded.

src/pygui/backend/models/frame_player.py

@@ -8,6 +8,19 @@ 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)]
 
+
+def all_sensor_series(frames: list[Frame]) -> tuple[list[str], list[list[float]]]:
+    """Per-sensor value series across every frame, for the whole-run Graph tab.
+
+    Sensor names are 1-based ("Sensor 1", ...), matching the C# original.
+    """
+    if not frames:
+        return [], []
+    n_sensors = len(frames[0].values)
+    names = [f"Sensor {i + 1}" for i in range(n_sensors)]
+    series = [[frame.values[i] for frame in frames] for i in range(n_sensors)]
+    return names, series
+
 class FramePlayer:
     def __init__(self) -> None:
         self._frames: list[Frame] =[]
@@ -22,6 +35,10 @@ class FramePlayer:
     def total(self) -> int:
         return len(self._frames)
 
+    @property
+    def frames(self) -> tuple[Frame, ...]:
+        return tuple(self._frames)
+
     @property
     def index(self) -> int:
         return self._i