fix(wafer): derive family sensor counts from YAML layouts, bound frame decode to layout

src/pygui/backend/wafer/family_spec.py

@@ -1,9 +1,14 @@
 """Single source of truth for the wafer sensor-count partition."""
+from __future__ import annotations
+
+from pygui.backend.wafer.wafer_layouts import load_layout_for_wafer_id
 
 
 def sensor_count_for(family_code: str) -> int:
-    """Return the number of valid sensor readings for a wafer family code.
+    """Real sensor count for a wafer family code, from its YAML layout.
 
-    Returns 80 for the "X" family. Returns 244 for every other family
-    code."""
-    return 80 if family_code == "X" else 244
+    0 for an unknown/empty family code."""
+    try:
+        return len(load_layout_for_wafer_id(family_code))
+    except KeyError:
+        return 0

src/pygui/serialcomm/data_parser.py

@@ -20,17 +20,7 @@ log = logging.getLogger(__name__)
 
 def csv_column_count(family_code: str) -> int:
     """Return the number of columns to display for a family code."""
-    mapping = {
-        "A": 48,
-        "E": 48,
-        "P": 48,
-        "B": 29,
-        "C": 29,
-        "D": 29,
-        "F": 22,
-        "X": 80,
-    }
-    return mapping.get(family_code, 0)
+    return sensor_count_for(family_code)
 
 
 def _hex_to_binary(hex_str: str) -> list[int]: