fix: hide internal AI error details from user-facing responses

upgrade: paid-tier AI models + increased concurrency

fix: sequential AI parsing to prevent free-tier rate limit exhaustion

Sync envelopes from Google Sheets before every scan

Add post-fetch date filter for precise email matching

Set default branch to Montreal for unclassified Interac transactions

Add envelope number column with contact lookup, clean summary cards

Broaden Gmail query, clear caches on reset, improve scan logging

Fix scan dedup to batch inArray queries for large email volumes

feat: improve scan journal with real error logging and display

feat: add Excel export, filters, search, match accuracy, journal page, and email viewer improvements

Initial commit — ICC Interac Manager full-stack app