feat(map): add edge-center delta stats, thickness overlay, and layout fix

- Add edge-center sensor pair tables and delta calculations per wafer family.
- Parse and interpolate wafer thickness CSV data for offscreen visualization.
- Refactor ReadoutPanel layout using Item + anchors to fix right-margin clipping.
- Compact E-C Delta text format to fit standard sidebar width.
- Add pytest suite covering delta calculations, layout pairs, and thickness CSV.

tests/test_wafer_layouts.py

@@ -1,7 +1,11 @@
 """Tests for src/pygui/backend/wafer_layouts.py."""
 import pytest
 
-from pygui.backend.wafer.wafer_layouts import available_families, load_layout
+from pygui.backend.wafer.wafer_layouts import (
+    available_families,
+    ec_pairs_for_wafer_id,
+    load_layout,
+)
 from pygui.backend.wafer.zwafer_models import Sensor
 
 
@@ -20,3 +24,27 @@ def test_loads_sensors_in_mm():
 def test_unknown_family_raises():
     with pytest.raises(KeyError):
         load_layout("nope")
+
+
+# ---- edge-center pair tables (ADR-0002) ----
+
+def test_ec_pairs_aep_match_csharp_table():
+    pairs = ec_pairs_for_wafer_id("A00123")
+    assert pairs[0] == (0, 40)
+    assert pairs[-1] == (15, 47)
+    assert len(pairs) == 16
+    assert ec_pairs_for_wafer_id("E1") == pairs
+    assert ec_pairs_for_wafer_id("P1") == pairs
+
+
+def test_ec_pairs_per_family_classes():
+    assert len(ec_pairs_for_wafer_id("B00108")) == 12
+    assert ec_pairs_for_wafer_id("C1") == ec_pairs_for_wafer_id("D1")
+    assert ec_pairs_for_wafer_id("F1")[0] == (0, 18)
+    assert ec_pairs_for_wafer_id("X1")[0] == (5, 76)
+    assert ec_pairs_for_wafer_id("Z1")[0] == (49, 0)
+
+
+def test_ec_pairs_unknown_family_empty():
+    assert ec_pairs_for_wafer_id("Q999") == ()
+    assert ec_pairs_for_wafer_id("") == ()