fix: restore envelope number in export, remove accents from branches

fix: Exporter button now exports all scanned data fast

perf: fast Excel export — dedicated endpoint + fixed column widths

fix: remove "ICC " prefix from all branch/succursale names

Set default branch to Montreal for unclassified Interac transactions

Add envelope number column with contact lookup, clean summary cards

Wire Ctrl+Enter and Ctrl+Right keyboard shortcuts on review page

Improve Branches page empty state with add button and better UX

feat: add Email Senders page, replace Reports with Coming Soon, remove AI references

feat: replace all hardcoded mock data on Reports page with real API data

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

Initial commit — ICC Interac Manager full-stack app