The PIN validation is failing on the
owner dashboard page. The shop is created
with a PIN and stored in DynamoDB, but
when the owner tries to access dashboard
with the same PIN it shows "Invalid PIN".
Fix the PIN verification:

1. When verifying PIN, fetch the shop from
   DynamoDB using the shopId from URL params
2. Compare the entered PIN with the stored
   PIN using exact string match after trimming
3. The shopId in URL is encoded - decode it
   properly before querying DynamoDB
4. Add console.log to debug what PIN is
   stored vs what is entered