fix(profiles): normalize profile IDs for Kanban assignees and lookups

- Add normalize_profile_name() for lowercase canonical IDs and Default alias
- Use canonical names in create/delete/rename/export/import/set_active paths
- Canonicalize Kanban assignee on create/assign, list filter, and worker spawn
- Tests for mixed-case assignees and profile resolution (fixes #18498)

tests/hermes_cli/test_profiles.py

@@ -15,6 +15,7 @@ from unittest.mock import patch, MagicMock
 import pytest
 
 from hermes_cli.profiles import (
+    normalize_profile_name,
     validate_profile_name,
     get_profile_dir,
     create_profile,
@@ -58,6 +59,24 @@ def profile_env(tmp_path, monkeypatch):
 # TestValidateProfileName
 # ===================================================================
 
+class TestNormalizeProfileName:
+    """Tests for normalize_profile_name()."""
+
+    def test_title_case_normalized(self):
+        assert normalize_profile_name("Jules") == "jules"
+        assert normalize_profile_name("  Librarian ") == "librarian"
+
+    def test_default_case_insensitive(self):
+        assert normalize_profile_name("Default") == "default"
+        assert normalize_profile_name("DEFAULT") == "default"
+
+    def test_empty_raises(self):
+        with pytest.raises(ValueError, match="cannot be empty"):
+            normalize_profile_name("")
+        with pytest.raises(ValueError, match="cannot be empty"):
+            normalize_profile_name("   ")
+
+
 class TestValidateProfileName:
     """Tests for validate_profile_name()."""
 
@@ -66,7 +85,10 @@ class TestValidateProfileName:
         # Should not raise
         validate_profile_name(name)
 
-    @pytest.mark.parametrize("name", ["UPPER", "has space", ".hidden", "-leading"])
+    def test_uppercase_accepted_via_normalization(self):
+        validate_profile_name("Jules")
+
+    @pytest.mark.parametrize("name", ["has space", ".hidden", "-leading"])
     def test_invalid_names_rejected(self, name):
         with pytest.raises(ValueError):
             validate_profile_name(name)
@@ -107,6 +129,10 @@ class TestGetProfileDir:
         result = get_profile_dir("coder")
         assert result == tmp_path / ".hermes" / "profiles" / "coder"
 
+    def test_named_profile_matching_is_case_insensitive(self, profile_env):
+        tmp_path = profile_env
+        assert get_profile_dir("Coder") == tmp_path / ".hermes" / "profiles" / "coder"
+
 
 # ===================================================================
 # TestCreateProfile