test: enhance session source tests and add validation for chat types

- Renamed test method for clarity and added comprehensive tests for `SessionSource` including handling of numeric `chat_id`, missing optional fields, and invalid platforms.
- Introduced tests for session source descriptions based on chat types and names, ensuring accurate representation in prompts.
- Improved file tools tests by validating schema structures, ensuring no duplicate model IDs, and enhancing error handling in file operations.

tests/hermes_cli/test_models.py

@@ -4,30 +4,53 @@ from hermes_cli.models import OPENROUTER_MODELS, menu_labels, model_ids
 
 
 class TestModelIds:
-    def test_returns_strings(self):
+    def test_returns_non_empty_list(self):
         ids = model_ids()
         assert isinstance(ids, list)
         assert len(ids) > 0
-        assert all(isinstance(mid, str) for mid in ids)
 
     def test_ids_match_models_list(self):
         ids = model_ids()
         expected = [mid for mid, _ in OPENROUTER_MODELS]
         assert ids == expected
 
+    def test_all_ids_contain_provider_slash(self):
+        """Model IDs should follow the provider/model format."""
+        for mid in model_ids():
+            assert "/" in mid, f"Model ID '{mid}' missing provider/ prefix"
+
+    def test_no_duplicate_ids(self):
+        ids = model_ids()
+        assert len(ids) == len(set(ids)), "Duplicate model IDs found"
+
 
 class TestMenuLabels:
     def test_same_length_as_model_ids(self):
-        labels = menu_labels()
-        ids = model_ids()
-        assert len(labels) == len(ids)
+        assert len(menu_labels()) == len(model_ids())
 
-    def test_recommended_in_first(self):
+    def test_first_label_marked_recommended(self):
         labels = menu_labels()
         assert "recommended" in labels[0].lower()
 
-    def test_labels_contain_model_ids(self):
+    def test_each_label_contains_its_model_id(self):
+        for label, mid in zip(menu_labels(), model_ids()):
+            assert mid in label, f"Label '{label}' doesn't contain model ID '{mid}'"
+
+    def test_non_recommended_labels_have_no_tag(self):
+        """Only the first model should have (recommended)."""
         labels = menu_labels()
-        ids = model_ids()
-        for label, mid in zip(labels, ids):
-            assert mid in label
+        for label in labels[1:]:
+            assert "recommended" not in label.lower(), f"Unexpected 'recommended' in '{label}'"
+
+
+class TestOpenRouterModels:
+    def test_structure_is_list_of_tuples(self):
+        for entry in OPENROUTER_MODELS:
+            assert isinstance(entry, tuple) and len(entry) == 2
+            mid, desc = entry
+            assert isinstance(mid, str) and len(mid) > 0
+            assert isinstance(desc, str)
+
+    def test_at_least_5_models(self):
+        """Sanity check that the models list hasn't been accidentally truncated."""
+        assert len(OPENROUTER_MODELS) >= 5