feat: add test validation command and improve environment variable handling

- Introduced a new command for validating tests, providing detailed instructions for running tests and fixing failures based on code changes.
- Updated the environment variable handling in the Claude provider to only allow explicitly defined variables, enhancing security and preventing leakage of sensitive information.
- Improved feature loading to handle errors more gracefully and load features concurrently, optimizing performance.
- Centralized port configuration for the Automaker application to prevent accidental termination of critical services.

libs/platform/src/index.ts

@@ -115,3 +115,6 @@ export {
   electronAppStat,
   electronAppReadFile,
 } from './system-paths.js';
+
+// Port configuration
+export { STATIC_PORT, SERVER_PORT, RESERVED_PORTS } from './config/ports.js';