feat(mcp): map gitea_commit_files in task capability resolver (closes #262)

tests/test_mcp_server.py

@@ -1071,9 +1071,11 @@ class TestGetFile(unittest.TestCase):
 # ---------------------------------------------------------------------------
 class TestCommitFiles(unittest.TestCase):
 
+    @patch("mcp_server.role_session_router.check_author_mutation_after_reviewer_stop",
+           return_value=(True, []))
     @patch("mcp_server.api_request")
     @patch("mcp_server.get_auth_header", return_value=FAKE_AUTH)
-    def test_commit_files_success(self, _auth, mock_api):
+    def test_commit_files_success(self, _auth, mock_api, _role):
         mock_api.return_value = {
             "commit": {"sha": "commit-sha-123"},
             "branch": {"name": "test-branch"}
@@ -1081,11 +1083,15 @@ class TestCommitFiles(unittest.TestCase):
         files = [
             {"operation": "create", "path": "test.txt", "content": "SGVsbG8="}
         ]
-        result = gitea_commit_files(
-            files=files,
-            message="Initial commit",
-            new_branch="test-branch"
-        )
+        env = {
+            "GITEA_ALLOWED_OPERATIONS": "gitea.repo.commit",
+        }
+        with patch.dict(os.environ, env, clear=True):
+            result = gitea_commit_files(
+                files=files,
+                message="Initial commit",
+                new_branch="test-branch"
+            )
         self.assertTrue(result["success"])
         self.assertEqual(result["commit"], "commit-sha-123")
         self.assertEqual(result["branch"], "test-branch")