feat(ledger): CSS derive families are names, never bodies — name floor 2 for css, dup: grouping sym-only; derive line says "repeated name" and dismisses scoped-css; plugin 0.1.41 (note #2917)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_shape_ledger.py

@@ -308,6 +308,12 @@ def test_derive_groups_copy_before_name_with_floors():
         ("d.css", "css", "btn", "s1"), ("e.css", "css", "btn", "s2"), ("f.css", "css", "btn", "s3"),
         ("g.py", "sym", "main", "s4"), ("h.py", "sym", "main", "s5"),            # only 2 files → no name group
         ("i.py", "sym", "one", "s6"),
+        # CSS (note 2917): identical bodies under different names are NOT a
+        # copy — two meanings sharing the style system's look; the same
+        # class in two files IS a family (the name floor is 2 for css).
+        ("j.css", "css", "muted", "same"), ("k.css", "css", "pin-auto", "same"),
+        ("l.css", "css", "card", "c1"), ("m.css", "css", "card", "c2"),
+        ("n.css", "css", "alone", "c3"),
     ]
     g = derive_groups(rows)
     assert g[("a.py", "sym", "helper")] == "dup:sha1" == g[("b.py", "sym", "helper")]
@@ -315,6 +321,10 @@ def test_derive_groups_copy_before_name_with_floors():
     assert g[("d.css", "css", "btn")] == "name:css:btn"
     assert ("g.py", "sym", "main") not in g
     assert ("i.py", "sym", "one") not in g
+    assert ("j.css", "css", "muted") not in g and ("k.css", "css", "pin-auto") not in g
+    assert g[("l.css", "css", "card")] == "name:css:card" == g[("m.css", "css", "card")]
+    assert ("n.css", "css", "alone") not in g
+    assert not any(v.startswith("dup:") for k, v in g.items() if k[1] == "css")
 
 
 def test_derive_new_summary_counts_copies_first_seen_since_the_previous_refresh():