Prepare shop-ready deployment docs and fix transaction modal UI

scripts/backup.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+# Nightly backup of the production DB.
+# Add to crontab:  5 2 * * *  /path/to/cash-collection-management-system/scripts/backup.sh >> /var/log/crm_omt_backup.log 2>&1
+set -euo pipefail
+
+REPO_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+BACKUP_DIR="${BACKUP_DIR:-$REPO_DIR/backups}"
+KEEP_DAYS="${KEEP_DAYS:-30}"
+TS="$(date +%Y%m%d_%H%M%S)"
+OUT="$BACKUP_DIR/crm_omt_${TS}.sql.gz"
+
+mkdir -p "$BACKUP_DIR"
+docker exec crm_omt_db pg_dump -U postgres -d crm_omt --clean --if-exists \
+  | gzip -9 > "$OUT"
+
+# Prune anything older than KEEP_DAYS days
+find "$BACKUP_DIR" -name 'crm_omt_*.sql.gz' -type f -mtime "+$KEEP_DAYS" -delete
+
+echo "[backup] wrote $OUT ($(du -h "$OUT" | cut -f1))"