Update version to v0.3.1-alpha

- Updated APP_VERSION from 0.2.2-alpha to 0.3.1-alpha
- Reflects current development progress with containerized environment
- Package lock updated during container build process

Status Notes:
- Containerized environment is working correctly
- Graph creation functionality restored and working
- Node creation works but has UI refresh issue: new nodes require page reload to appear in correct location
- Database Administration tools available in Admin → Database tab
- Tropical lagoon animated backgrounds implemented across login, welcome, and empty state pages

Author: mvalancy

package-lock.json

@@ -1 +1 @@
-export const APP_VERSION = '0.2.2-alpha';
+export const APP_VERSION = '0.3.1-alpha';