feat: profiles rename_profile

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

gates/profiles.py

@@ -57,3 +57,16 @@ def create_profile(base, name, pid, ts=0):
     reg["profiles"].append(entry)
     write_registry(base, reg)
     return entry
+
+
+def rename_profile(base, pid, name):
+    reg = read_registry(base)
+    entry = find_by_id(reg, pid)
+    if not entry:
+        raise KeyError(pid)
+    other = find_by_name(reg, name)
+    if other and other["id"] != pid:
+        raise ValueError(f"profile name already exists: {name}")
+    entry["name"] = name
+    write_registry(base, reg)
+    return entry

tests/test_profiles.py

@@ -34,3 +34,16 @@ def test_create_duplicate_name_raises(tmp_path):
     pr.create_profile(str(tmp_path), "setA", "id1")
     with pytest.raises(ValueError):
         pr.create_profile(str(tmp_path), "setA", "id2")
+
+def test_rename_profile(tmp_path):
+    pr.create_profile(str(tmp_path), "old", "id1")
+    e = pr.rename_profile(str(tmp_path), "id1", "new")
+    assert e["name"] == "new"
+    assert pr.find_by_name(pr.read_registry(str(tmp_path)), "new")["id"] == "id1"
+
+def test_rename_to_existing_name_raises(tmp_path):
+    import pytest
+    pr.create_profile(str(tmp_path), "a", "id1")
+    pr.create_profile(str(tmp_path), "b", "id2")
+    with pytest.raises(ValueError):
+        pr.rename_profile(str(tmp_path), "id2", "a")