Admin hub in /crush33: sidebar, donor lookup, danger-zone actions

Rebuilt the password-gated /crush33 (in-app /comp) screen into an admin
hub with a left sidebar and three sections:

- Comp tickets — the existing entry-only comp creator.
- Donor lookup — admin-only free-text search across the donor master
  list + online/offline transaction tables by name / email / phone /
  address / bear name (columns discovered per table, deduped by email).
- Actions (danger zone) — heavy warnings, red buttons, and an
  "are you sure" modal that spells out exactly what will happen:
    • Wipe slate — delete ALL ticket + audit records in the active
      event table (donor data untouched, irreversible).
    • Switch event table — repoint the app at a different NocoDB
      tickets/audit table to start a new event while keeping the old
      one intact.

Backend:
- New /api/admin/{status,wipe,switch-table,donor-search}, all gated by
  PORTAL_PASSWORD (POST-only so it never lands in a URL/log).
- NocoDBClient + AuditLogger: runtime-switchable tableId, count(),
  deleteAll(), probeTable() (reachable + Id-PK check before switching).
- DonorService.search() with adaptive column discovery.
- Table switch persists across redeploys via a small state file on a
  new /data volume (Dockerfile creates it owned by node so it's
  writable); applied at startup in buildContext.

Also shipped equivalent CLI scripts: scripts/wipe-slate.sh and
scripts/switch-event.sh. Drawer: "Comp tickets" -> "Admin (crush33)".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

scripts/wipe-slate.sh

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+set -euo pipefail
+#
+# wipe-slate.sh — clear ALL ticket + audit records from the tables the scanner
+# app currently uses, for a clean event run-through. Leaves the table SCHEMAS
+# intact and does NOT touch donor data. Reads NocoDB creds from backend/.env.
+#
+# Usage:
+#   scripts/wipe-slate.sh          # prompts for confirmation
+#   scripts/wipe-slate.sh --yes    # skip the prompt (for automation)
+#
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ENV_FILE="${ENV_FILE:-$SCRIPT_DIR/../backend/.env}"
+
+get() { grep -E "^$1=" "$ENV_FILE" | head -1 | cut -d= -f2-; }
+BASE_URL="$(get NOCODB_BASE_URL)"
+TOKEN="$(get NOCODB_API_TOKEN)"
+TICKETS="$(get NOCODB_TABLE_ID)"
+AUDIT="$(get NOCODB_AUDIT_TABLE_ID)"
+
+[ -n "$BASE_URL" ] && [ -n "$TOKEN" ] && [ -n "$TICKETS" ] || {
+  echo "Missing NocoDB config in $ENV_FILE" >&2; exit 1; }
+
+YES=0
+case "${1:-}" in -y|--yes) YES=1;; esac
+
+count() {
+  curl -s -H "xc-token: $TOKEN" "$BASE_URL/api/v2/tables/$1/records?limit=1" \
+    | python3 -c 'import sys,json;print(json.load(sys.stdin).get("pageInfo",{}).get("totalRows",0))'
+}
+
+echo "Target: $BASE_URL"
+echo "  tickets ($TICKETS): $(count "$TICKETS") records"
+[ -n "$AUDIT" ] && echo "  audit   ($AUDIT): $(count "$AUDIT") records"
+
+if [ "$YES" -ne 1 ]; then
+  read -rp "Delete ALL of the above? This cannot be undone. [y/N] " ans
+  case "$ans" in y|Y|yes|YES) ;; *) echo "aborted"; exit 1;; esac
+fi
+
+wipe() {
+  local label="$1" table="$2" total=0 ids n
+  while :; do
+    ids="$(curl -s -H "xc-token: $TOKEN" "$BASE_URL/api/v2/tables/$table/records?limit=1000&fields=Id" \
+      | python3 -c 'import sys,json;print(json.dumps([{"Id":r["Id"]} for r in json.load(sys.stdin)["list"]]))')"
+    n="$(printf '%s' "$ids" | python3 -c 'import sys,json;print(len(json.load(sys.stdin)))')"
+    [ "$n" -eq 0 ] && break
+    curl -s -o /dev/null -X DELETE -H "xc-token: $TOKEN" -H "Content-Type: application/json" \
+      "$BASE_URL/api/v2/tables/$table/records" --data "$ids"
+    total=$((total + n))
+  done
+  echo "  $label: deleted $total"
+}
+
+wipe "tickets" "$TICKETS"
+[ -n "$AUDIT" ] && wipe "audit" "$AUDIT"
+echo "Done — slate is clean."