Improve Branches page empty state with add button and better UX

Wire Settings page to real data with working buttons

Fix OAuth on reverse proxy (HuggingFace): trust proxy, secure cookies, error display

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

feat: improve scan journal with real error logging and display

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

fix: center Advanced Options divider on login page

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

Initial commit — ICC Interac Manager full-stack app