chore(supabase): full purge — remove all Supabase references from codebase

- Delete supabase/ directory (config.toml, push-migrations.js,
  ADMIN_CREATE_STOP_FIX.sql, 137 archived migration files)
- Remove @supabase/ssr and @supabase/supabase-js from package.json
- Strip *.supabase.co from next.config.ts image hostnames
- Strip https://*.supabase.co from vercel.json CSP connect-src
- Remove 'supabase/**' ignore from eslint.config.mjs
- Clean supabase references from src/lib/db.ts, vitest.config.ts,
  db/seeds/2026-tuxedo-tour-stops.sql, src/actions/storefront.ts,
  scripts/import-tuxedo-stops.ts comments
- Rewrite env-var docs in README, ENVIRONMENT, PRODUCTION_SETUP,
  PRODUCTION_DEPLOYMENT_CHECKLIST, LAUNCH_CHECKLIST, CLAUDE,
  MEMORY, REPORT to drop NEXT_PUBLIC_SUPABASE_URL /
  SUPABASE_SERVICE_ROLE_KEY / supabase link / supabase CLI references

The canonical migration runner is now scripts/migrate.js (uses pg
directly via DATABASE_URL). Migrations live in db/migrations/. The
Supabase CLI is no longer in the codebase. The only remaining
'@supabase/*' in the dep tree is @supabase/auth-js as a transitive
of @neondatabase/auth (Neon Auth / Better Auth).

Final source scan: grep -rln '@supabase\|rest/v1\|supabase\.co'
src/ tests/ db/ scripts/ next.config.ts vercel.json eslint.config.mjs
package.json returns zero. Verification: npm install clean
(11 added, 21 removed, 12 changed), tsc shows same 17 pre-existing
errors (Stripe dahlia API version + fetch preconnect mocks),
vitest 172/175 (3 pre-existing failures in getAdminUser.test.ts),
lint shows same 14 pre-existing errors. Live-tested: dev server
boots in 248ms, public storefronts (/) (/login) (/pricing) (/tuxedo)
(/indian-river-direct) all return 200; /admin/v2?demo=1 reaches 200
after dev_session redirect; storefront renders real brand content.

supabase/migrations/.archived/009_water_log_entry_edit_delete.sql

@@ -1,88 +0,0 @@
--- =============================================================================
--- Water Log V1 — Entry Edit & Delete
--- Allows water_admin and platform_admin to edit measurement/notes
--- Allows deletion of entries (hard delete, not soft)
--- =============================================================================
-
--- =============================================================================
--- update_water_entry(p_entry_id uuid, p_measurement numeric, p_notes text)
--- Updates measurement and notes only. Preserves user_id, headgate_id,
--- logged_at, submitted_via.
--- Returns jsonb: {success} or {success:false, error}
--- =============================================================================
-CREATE OR REPLACE FUNCTION public.update_water_entry(p_entry_id uuid, p_measurement numeric, p_notes text)
-RETURNS jsonb
-LANGUAGE plpgsql
-SECURITY DEFINER SET search_path = public
-AS $$
-BEGIN
-  UPDATE public.water_log_entries
-  SET measurement = p_measurement, notes = p_notes
-  WHERE id = p_entry_id;
-
-  IF NOT FOUND THEN
-    RETURN jsonb_build_object('success', false, 'error', 'Entry not found');
-  END IF;
-
-  RETURN jsonb_build_object('success', true);
-END;
-$$;
-
--- =============================================================================
--- delete_water_entry(p_entry_id uuid)
--- Hard-deletes an entry. Use with caution — no soft-delete for entries.
--- Returns jsonb: {success} or {success:false, error}
--- =============================================================================
-CREATE OR REPLACE FUNCTION public.delete_water_entry(p_entry_id uuid)
-RETURNS jsonb
-LANGUAGE plpgsql
-SECURITY DEFINER SET search_path = public
-AS $$
-BEGIN
-  DELETE FROM public.water_log_entries WHERE id = p_entry_id;
-
-  IF NOT FOUND THEN
-    RETURN jsonb_build_object('success', false, 'error', 'Entry not found');
-  END IF;
-
-  RETURN jsonb_build_object('success', true);
-END;
-$$;
-
-NOTIFY pgrst, 'reload schema';
-
--- =============================================================================
--- get_water_entry_by_id(p_entry_id uuid)
--- Returns a single entry row for the edit page.
--- Returns jsonb: {entry: {...}} or {entry: null}
--- =============================================================================
-CREATE OR REPLACE FUNCTION public.get_water_entry_by_id(p_entry_id uuid)
-RETURNS jsonb
-LANGUAGE plpgsql
-SECURITY DEFINER SET search_path = public
-AS $$
-BEGIN
-  RETURN (
-    SELECT jsonb_build_object('entry', (
-      SELECT jsonb_build_object(
-        'id', e.id,
-        'headgate_id', e.headgate_id,
-        'user_id', e.user_id,
-        'headgate_name', hg.name,
-        'user_name', u.name,
-        'measurement', e.measurement,
-        'unit', e.unit,
-        'notes', e.notes,
-        'submitted_via', e.submitted_via,
-        'logged_at', e.logged_at
-      )
-      FROM public.water_log_entries e
-      JOIN public.water_headgates hg ON hg.id = e.headgate_id
-      JOIN public.water_users u ON u.id = e.user_id
-      WHERE e.id = p_entry_id
-    ))
-  );
-END;
-$$;
-
-NOTIFY pgrst, 'reload schema';