refactor: modernize WaferMapTab layout and redesign ReadoutPanel statistics display

src/pygui/backend/data/file_browser.py

@@ -123,6 +123,13 @@ class FileBrowser(QObject):
                 wafer_type = metadata.get_wafer_type().upper() or (csv_path.stem[0].upper() if csv_path.stem else "")
                 date_str = metadata.string_date_format()
                 serial = metadata.wafer[1:] if len(metadata.wafer) > 1 else ""
+                if not serial:
+                    stem = csv_path.stem
+                    serial = stem[1:] if len(stem) > 1 else ""
+                if "-" in serial:
+                    serial = serial.split("-")[0]
+                if "_" in serial:
+                    serial = serial.split("_")[0]
                 time_str = date_str[11:] if len(date_str) > 10 else ""
                 self._files.append(
                     {
@@ -142,13 +149,18 @@ class FileBrowser(QObject):
                 )
             except Exception:
                 stem = csv_path.stem
+                serial_fallback = stem[1:] if len(stem) > 1 else ""
+                if "-" in serial_fallback:
+                    serial_fallback = serial_fallback.split("-")[0]
+                if "_" in serial_fallback:
+                    serial_fallback = serial_fallback.split("_")[0]
                 self._files.append(
                     {
                         "selected": selected_state.get(str(csv_path), False),
                         "baseName": stem,
                         "wafer": stem,
                         "waferType": stem[0].upper() if stem else "",
-                        "serialNumber": stem[1:] if len(stem) > 1 else "",
+                        "serialNumber": serial_fallback,
                         "date": "",
                         "timeStr": "",
                         "chamber": "",

src/pygui/backend/visualization/wafer_map_item.py

@@ -229,8 +229,8 @@ class WaferMapItem(QQuickPaintedItem):
         return groups
 
     def _scale(self, ds: int, r_mm: float) -> float:
-        """Pixels per mm. The wafer radius maps to ds//2 - 4 px."""
-        return (ds / 2 - 4) / r_mm
+        """Pixels per mm. The wafer radius maps to ds//2 - 24 px."""
+        return (ds / 2 - 24) / r_mm
 
     def _to_px(self, x_mm: float, y_mm: float, cx: int, cy: int, scale: float) -> tuple[int, int]:
         """Center-origin mm → pixel (top-left origin). Y is flipped."""