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/040_shipping_fulfillment_rpcs.sql

@@ -1,86 +0,0 @@
--- Migration 040: Shipping Fulfillment RPCs
--- Idempotent: CREATE OR REPLACE FUNCTION
-
--- ── 1. update_shipping_order ──────────────────────────────────────────────────
--- Updates shipping_status and tracking_number for an order.
--- Requires can_manage_orders permission (checked in server action via getAdminUser).
-
-CREATE OR REPLACE FUNCTION public.update_shipping_order(
-  p_order_id         UUID,
-  p_shipping_status  TEXT,
-  p_tracking_number TEXT DEFAULT NULL
-)
-RETURNS JSONB
-LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
-AS $$
-BEGIN
-  UPDATE orders SET
-    shipping_status  = p_shipping_status,
-    tracking_number  = p_tracking_number,
-    updated_at       = now()
-  WHERE id = p_order_id;
-
-  IF NOT FOUND THEN
-    RETURN jsonb_build_object('success', false, 'error', 'Order not found');
-  END IF;
-
-  RETURN jsonb_build_object('success', true);
-END;
-$$;
-
--- ── 2. get_shipping_orders ───────────────────────────────────────────────────
--- Returns orders that contain at least one shipping-line item.
--- Filtered by brand_id when p_brand_id is provided.
-
-CREATE OR REPLACE FUNCTION public.get_shipping_orders(p_brand_id UUID DEFAULT NULL)
-RETURNS JSONB
-LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
-AS $$
-DECLARE
-  v_result JSONB;
-BEGIN
-  SELECT jsonb_agg(
-    jsonb_build_object(
-      'id', o.id,
-      'customer_name', o.customer_name,
-      'customer_email', o.customer_email,
-      'customer_phone', o.customer_phone,
-      'status', o.status,
-      'subtotal', o.subtotal,
-      'shipping_status', o.shipping_status,
-      'tracking_number', o.tracking_number,
-      'created_at', o.created_at,
-      'brand_id', o.brand_id,
-      'order_items', COALESCE((
-        SELECT jsonb_agg(jsonb_build_object(
-          'id', oi.id,
-          'product_id', oi.product_id,
-          'quantity', oi.quantity,
-          'price', oi.price,
-          'fulfillment', oi.fulfillment,
-          'products', jsonb_build_object('name', p.name)
-        ))
-        FROM order_items oi
-        JOIN products p ON oi.product_id = p.id
-        WHERE oi.order_id = o.id AND oi.fulfillment = 'shipping'
-      ), '[]'::JSONB)
-    )
-  )
-  INTO v_result
-  FROM orders o
-  WHERE o.id IN (
-    SELECT DISTINCT oi.order_id
-    FROM order_items oi
-    WHERE oi.fulfillment = 'shipping'
-  )
-  AND (
-    p_brand_id IS NULL
-    OR o.brand_id = p_brand_id
-  )
-  ORDER BY o.created_at DESC;
-
-  RETURN COALESCE(v_result, '[]'::JSONB);
-END;
-$$;
-
-NOTIFY pgrst, 'reload schema';