feat(combos): add Combos & Synergies detection, chip-style UI with dual hover; JSON persistence and headless honoring; stage ordering; docs and tests; bump to v2.2.1

code/tests/test_detect_combos_expanded.py

@@ -0,0 +1,17 @@
+from __future__ import annotations
+
+from deck_builder.combos import detect_combos
+
+
+def test_detect_expanded_pairs():
+    names = [
+        "Isochron Scepter",
+        "Dramatic Reversal",
+        "Basalt Monolith",
+        "Rings of Brighthearth",
+        "Some Other Card",
+    ]
+    combos = detect_combos(names, combos_path="config/card_lists/combos.json")
+    found = {(c.a, c.b) for c in combos}
+    assert ("Isochron Scepter", "Dramatic Reversal") in found
+    assert ("Basalt Monolith", "Rings of Brighthearth") in found