feat: enhance compatibility table with file name handling and UI updates

tests/test_compat.py

@@ -77,6 +77,23 @@ def test_divergent_surface_raises_asterisk():
     assert lib["cells"]["Game C"]["diverges"] is True
 
 
+def test_hash_prefix_is_stripped_for_grouping():
+    # stored names carry a per-file <sha8>_ prefix; copies must still group under one library row
+    t = compatibility_table([
+        Entry("Game A", _snap("333ab0c4_PIKLIB8.dll", ["SHOW", "HIDE"])),
+        Entry("Game B", _snap("8dc0165d_PIKLIB8.dll", ["SHOW", "HIDE"])),
+        Entry("Game C", _snap("bba62d83_PIKLIB8.dll", ["SHOW", "HIDE", "PAUSE"])),
+    ])
+    assert len(t["libraries"]) == 1
+    lib = t["libraries"][0]
+    assert lib["name"] == "PIKLIB8.dll"          # prefix gone from the display name
+    assert lib["variant_count"] == 2             # A,B identical → reference; C diverges → asterisk
+    assert lib["cells"]["Game C"]["diverges"] is True
+    # the original stored filename is preserved per member for correlation
+    files = {m["file"] for v in lib["variants"] for m in v["members"]}
+    assert "333ab0c4_PIKLIB8.dll" in files
+
+
 def test_grouping_is_case_insensitive_keeps_common_spelling():
     t = compatibility_table([
         Entry("Game A", _snap("Piklib8.dll", ["SHOW"])),