Update default configuration: Local Development → Local Single-core

- Rename "Local Development" to "Local Single-core"
- Change default CPUs from 4 to 1
- Change default memory from 8GB to 16GB
- Update corresponding tests to match new configuration name

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: jeremymanning

clustrix/notebook_magic.py

@@ -178,11 +178,11 @@ class widgets:  # type: ignore
 logger = logging.getLogger(__name__)
 # Default cluster configurations
 DEFAULT_CONFIGS = {
-    "Local Development": {
-        "name": "Local Development",
+    "Local Single-core": {
+        "name": "Local Single-core",
         "cluster_type": "local",
-        "default_cores": 4,
-        "default_memory": "8GB",
+        "default_cores": 1,
+        "default_memory": "16GB",
         "description": "Local machine for development and testing",
     },
     "Local Multi-core": {

tests/test_notebook_magic.py

@@ -61,9 +61,9 @@ def test_default_configs_values(self):
 
     def test_local_configs_present(self):
         """Test that local configurations are present."""
-        assert "Local Development" in DEFAULT_CONFIGS
+        assert "Local Single-core" in DEFAULT_CONFIGS
         assert "Local Multi-core" in DEFAULT_CONFIGS
-        assert DEFAULT_CONFIGS["Local Development"]["cluster_type"] == "local"
+        assert DEFAULT_CONFIGS["Local Single-core"]["cluster_type"] == "local"
         assert DEFAULT_CONFIGS["Local Multi-core"]["cluster_type"] == "local"
         assert DEFAULT_CONFIGS["Local Multi-core"]["default_cores"] == -1
 
@@ -215,7 +215,7 @@ def test_widget_initialization(self, mock_ipython_environment):
         widget = EnhancedClusterConfigWidget()
         # Check that default configs are loaded
         assert len(widget.configs) >= len(DEFAULT_CONFIGS)
-        assert "Local Development" in widget.configs
+        assert "Local Single-core" in widget.configs
         assert "Local Multi-core" in widget.configs
         # Check initial state
         assert widget.current_config_name is not None