feat: add new frontend components, MH batch worker, and gitignore rules

- Add all new Frontend source files (pages, components, hooks, utils)
- Add selenium_MHBatchPaymentCheckWorker.py and MHSinglePaymentCheckWorker.py
- Add install-steps-5-13.sh setup script
- Update .gitignore to exclude runtime/sensitive data (backups, uploads,
  chat-history, keys, downloads, generated .d.ts files) while keeping folders
- Add .gitkeep to preserve empty runtime folders in git

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

install-steps-5-13.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+# =============================================================
+#  Dental Manager — Setup Steps 5–13
+#  Run this from a terminal where you can enter your sudo password
+# =============================================================
+
+set -e   # stop on any error
+cd "$(dirname "$0")"   # always run from the project root
+
+echo ""
+echo "=============================="
+echo " STEP 5 — Install PostgreSQL  "
+echo "=============================="
+sudo apt-get install -y postgresql postgresql-contrib
+sudo systemctl enable postgresql
+sudo systemctl start postgresql
+sudo -u postgres psql -c "CREATE DATABASE dentalapp OWNER postgres;" 2>/dev/null || echo "(database already exists, skipping)"
+sudo -u postgres psql -c "ALTER USER postgres WITH PASSWORD 'mypassword';"
+sudo sed -i 's/scram-sha-256/md5/g' /etc/postgresql/*/main/pg_hba.conf
+sudo systemctl restart postgresql
+echo "✓ PostgreSQL ready"
+
+echo ""
+echo "=============================="
+echo " STEP 6 — Install Redis       "
+echo "=============================="
+sudo apt-get install -y redis-server
+sudo systemctl enable redis-server
+sudo systemctl start redis-server
+redis-cli ping | grep -q PONG && echo "✓ Redis ready" || echo "⚠ Redis ping failed"
+
+echo ""
+echo "=============================="
+echo " STEP 7 — npm install         "
+echo "=============================="
+npm install
+echo "✓ Node.js dependencies installed (Python venvs created via postinstall)"
+
+echo ""
+echo "=============================="
+echo " STEP 9 — Setup .env files    "
+echo "=============================="
+npm run setup:env
+echo "✓ .env files created"
+echo ""
+echo ">>> STEP 9a: Cloudflare subdomain skipped."
+echo "    When ready, open apps/Frontend/.env and apps/Backend/.env"
+echo "    and replace 'yoursubdomain' with the office subdomain."
+
+echo ""
+echo "=============================="
+echo " STEP 10 — Database setup     "
+echo "=============================="
+npm run db:migrate
+npm run db:generate
+npm run db:seed
+echo "✓ Database migrated, types generated, and seeded"
+
+echo ""
+echo "=============================="
+echo " STEP 11 — Configure nginx    "
+echo "=============================="
+sudo apt-get install -y nginx
+sudo cp nginx.conf /etc/nginx/sites-available/dental-app
+sudo ln -sf /etc/nginx/sites-available/dental-app /etc/nginx/sites-enabled/dental-app
+sudo rm -f /etc/nginx/sites-enabled/default
+sudo nginx -t && sudo systemctl reload nginx
+echo "✓ nginx configured"
+
+echo ""
+echo "=============================="
+echo " STEP 13 — Desktop shortcuts  "
+echo "=============================="
+bash ~/Desktop/DentalManagementMH06/setup-desktop-shortcut.sh
+echo "✓ Desktop shortcuts created"
+
+echo ""
+echo "============================================"
+echo " All steps complete!"
+echo ""
+echo " STEP 12 — To run the app, open 2 terminals:"
+echo "   Terminal 1:  cd ~/Desktop/DentalManagementMH06 && npm run dev"
+echo "   Terminal 2:  cd ~/Desktop/DentalManagementMH06/apps/SeleniumService && .venv/bin/python3 agent.py"
+echo "============================================"