fix: update agent and wallet API endpoints, improve RPC error handling, and mark additional CLI commands as working

- Update agent execute endpoint to use /v1/agents/workflows/{id}/execute path
- Add workflow_id and inputs fields to agent creation and execution payloads
- Accept both 200 and 201 status codes for agent create, network create, and contribution submit
- Update wallet balance and send RPC endpoints to use rstrip('/') instead of replace('/api', '')
- Add chain_id parameter to wallet R

tests/cli/test_node.py

@@ -0,0 +1,80 @@
+"""Tests for node CLI commands"""
+
+import pytest
+from unittest.mock import Mock, patch, MagicMock
+from click.testing import CliRunner
+from aitbc_cli.commands.node import node
+from aitbc_cli.core.config import MultiChainConfig
+
+@pytest.fixture
+def runner():
+    """Create CLI runner"""
+    return CliRunner()
+
+@pytest.fixture
+def mock_config():
+    """Mock configuration loader"""
+    with patch('aitbc_cli.commands.node.load_multichain_config') as mock:
+        config = MagicMock()
+        config.nodes = {"node-1": MagicMock()}
+        mock.return_value = config
+        yield mock
+
+class TestNodeCommands:
+    
+    @patch('aitbc_cli.core.config.save_multichain_config')
+    @patch('aitbc_cli.commands.node.add_node_config')
+    @patch('aitbc_cli.commands.node.get_default_node_config')
+    def test_node_add_success(self, mock_get_default, mock_add, mock_save, runner, mock_config):
+        """Test successful node addition"""
+        # Setup mock
+        mock_node_config = MagicMock()
+        mock_get_default.return_value = mock_node_config
+        
+        mock_new_config = MagicMock()
+        mock_add.return_value = mock_new_config
+        
+        # Run command
+        result = runner.invoke(node, [
+            'add', 'new-node', 'http://localhost:8080'
+        ], obj={'output_format': 'json'})
+        
+        # Assertions
+        assert result.exit_code == 0
+        assert "added successfully" in result.output
+        mock_save.assert_called_once_with(mock_new_config)
+
+    def test_node_add_already_exists(self, runner, mock_config):
+        """Test adding an existing node"""
+        result = runner.invoke(node, [
+            'add', 'node-1', 'http://localhost:8080'
+        ], obj={'output_format': 'json'})
+        
+        assert result.exit_code != 0
+        assert "already exists" in result.output
+
+    @patch('aitbc_cli.commands.node.remove_node_config')
+    @patch('aitbc_cli.core.config.save_multichain_config')
+    def test_node_remove_success(self, mock_save, mock_remove, runner, mock_config):
+        """Test successful node removal"""
+        # Setup mock
+        mock_new_config = MagicMock()
+        mock_remove.return_value = mock_new_config
+        
+        result = runner.invoke(node, [
+            'remove', 'node-1', '--force'
+        ], obj={'output_format': 'json'})
+        
+        assert result.exit_code == 0
+        assert "removed successfully" in result.output
+        mock_save.assert_called_once_with(mock_new_config)
+
+    def test_node_remove_not_found(self, runner, mock_config):
+        """Test removing a non-existent node"""
+        result = runner.invoke(node, [
+            'remove', 'non-existent-node', '--force'
+        ], obj={'output_format': 'json'})
+        
+        assert result.exit_code != 0
+        assert "not found" in result.output
+