feat: automated nightly scraper + housekeeping

Scraper automation (docker-compose):
- Add scraper service to docker-compose.yml using the same image and
  shared park_data volume; overrides CMD to run scrape-schedule.sh
- scripts/scrape-schedule.sh: runs an initial scrape on container start,
  then sleeps until 3:00 AM (respects TZ env var) and repeats nightly;
  logs timestamps and next-run countdown; non-fatal on scrape errors

Staleness window: 7 days → 72 hours in lib/db.ts so data refreshes
more frequently with the automated schedule in place

Remove favicon: delete app/icon.tsx and public/logo.svg

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

scripts/scrape-schedule.sh

@@ -0,0 +1,45 @@
+#!/bin/sh
+# Nightly scraper scheduler — runs inside the Docker scraper service.
+#
+# Behaviour:
+#   1. Runs an initial scrape immediately on container start.
+#   2. Sleeps until 3:00 AM (container timezone, set via TZ env var).
+#   3. Runs the scraper, then sleeps until the next 3:00 AM, forever.
+#
+# Timezone: set TZ in the scraper service environment to control when
+# "3am" is (e.g. TZ=America/New_York). Defaults to UTC if unset.
+
+log() {
+  echo "[scheduler] $(date '+%Y-%m-%d %H:%M %Z') — $*"
+}
+
+run_scrape() {
+  log "Starting scrape"
+  if npm run scrape; then
+    log "Scrape completed"
+  else
+    log "Scrape failed — will retry at next scheduled time"
+  fi
+}
+
+seconds_until_3am() {
+  now=$(date +%s)
+  # Try today's 3am first; if already past, use tomorrow's.
+  target=$(date -d "today 03:00" +%s)
+  if [ "$now" -ge "$target" ]; then
+    target=$(date -d "tomorrow 03:00" +%s)
+  fi
+  echo $((target - now))
+}
+
+# ── Run immediately on startup ────────────────────────────────────────────────
+run_scrape
+
+# ── Nightly loop ──────────────────────────────────────────────────────────────
+while true; do
+  wait=$(seconds_until_3am)
+  next=$(date -d "now + ${wait} seconds" '+%Y-%m-%d %H:%M %Z')
+  log "Next scrape in $((wait / 3600))h $((( wait % 3600) / 60))m  (${next})"
+  sleep "$wait"
+  run_scrape
+done