fix(validation): satisfy quality gate checks

- add root test script that runs mobile jest
- adjust hook usage to satisfy rules-of-hooks
- document validation commands for operators

AGENTS.md

@@ -0,0 +1,7 @@
+# AGENTS
+
+## Verification
+- npm test (runs mobile Jest suite)
+- npm run lint
+- npm run typecheck
+- npm run build