Ensure that the ApiErrorCode type is exported

src/index.ts

@@ -1,5 +1,5 @@
 export { OwlBoardClient } from './lib/client.js';
-export { ValidationError, ApiError } from './lib/errors.js';
+export { ValidationError, ApiError, type ApiErrorCode } from './lib/errors.js';
 
 // Re-export API Schema types
 export type * from '@owlboard/api-schema-types'

src/lib/validation.ts

@@ -97,7 +97,7 @@ export const IsValidDateStr = (s: string): boolean => {
     for (let i = 0; i < 10; i++) {
         if (i === 4 || i === 7) continue;
         const c = s.charCodeAt(i);
-        if (!isDigit(i)) return false;
+        if (!isDigit(c)) return false;
     }
 
     const y = parseInt(s.substring(0, 4), 10);

tsconfig.json

@@ -7,9 +7,9 @@
 
     // Environment Settings
     // See also https://aka.ms/tsconfig/module
-    "module": "esnext",
+    "module": "nodenext",
     "target": "esnext",
-    "moduleResolution": "bundler",
+    "moduleResolution": "nodenext",
     "baseUrl": ".",
     "types": [],
     // For nodejs: