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/052_wholesale_credit_limit.sql

@@ -1,124 +0,0 @@
--- Migration 052: Credit Limit Enforcement
--- Blocks wholesale orders that would exceed the customer's credit limit.
-
-BEGIN;
-
--- ── Update create_wholesale_order to enforce credit limits ───────────────────────
--- Adds: credit_limit check, outstanding balance calculation, rejection if exceeded
-DROP FUNCTION IF EXISTS public.create_wholesale_order(
-  UUID, UUID, DATE, JSONB, INTEGER, TEXT
-);
-
-CREATE OR REPLACE FUNCTION public.create_wholesale_order(
-  p_brand_id               UUID DEFAULT NULL,
-  p_customer_id            UUID DEFAULT NULL,
-  p_anticipated_pickup_date DATE DEFAULT NULL,
-  p_items                  JSONB DEFAULT '[]'::JSONB,
-  p_deposit_percentage     INTEGER DEFAULT NULL,
-  p_notes                  TEXT DEFAULT NULL
-)
-RETURNS JSONB
-LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
-AS $$
-DECLARE
-  v_order_id       UUID;
-  v_subtotal       NUMERIC(10,2);
-  v_dep_required   NUMERIC(10,2) := 0;
-  v_customer       RECORD;
-  v_settings       RECORD;
-  v_inv_number     TEXT;
-  v_inv_token      TEXT;
-  v_status         TEXT;
-  v_outstanding    NUMERIC(10,2);
-BEGIN
-  -- Resolve customer: credit limit + deposit rules
-  SELECT
-    credit_limit,
-    deposits_enabled,
-    deposit_threshold,
-    deposit_percentage
-  INTO v_customer
-  FROM wholesale_customers
-  WHERE id = p_customer_id;
-
-  IF NOT FOUND THEN
-    RETURN jsonb_build_object('success', false, 'error', 'Customer not found');
-  END IF;
-
-  -- Calculate subtotal
-  v_subtotal := COALESCE(
-    (SELECT SUM(
-      ((item->>'quantity')::NUMERIC) * ((item->>'unit_price')::NUMERIC)
-     ) FROM jsonb_array_elements(p_items) AS item),
-    0
-  );
-
-  -- Credit limit enforcement: reject if order would exceed limit
-  IF v_customer.credit_limit > 0 THEN
-    SELECT COALESCE(SUM(balance_due), 0) INTO v_outstanding
-    FROM wholesale_orders
-    WHERE customer_id = p_customer_id
-      AND status != 'fulfilled';
-
-    IF v_outstanding + v_subtotal > v_customer.credit_limit THEN
-      RETURN jsonb_build_object(
-        'success', false,
-        'error', 'Order exceeds available credit. Please reduce the order size or pay outstanding balance.',
-        'credit_limit', v_customer.credit_limit,
-        'outstanding_balance', v_outstanding,
-        'order_total', v_subtotal
-      );
-    END IF;
-  END IF;
-
-  -- Generate TC-XXXXXX invoice number using RANDOM()
-  v_inv_number := 'TC-' || LPAD(FLOOR(RANDOM() * 1000000)::INT::TEXT, 6, '0');
-  -- Generate a 32-char hex invoice token using md5 of random + timestamp
-  v_inv_token := md5(random()::text || clock_timestamp()::text || now()::text || p_brand_id::text);
-
-  -- Determine if deposit required
-  IF v_customer.deposits_enabled THEN
-    IF v_customer.deposit_threshold IS NULL OR v_subtotal >= v_customer.deposit_threshold THEN
-      v_dep_required := ROUND(v_subtotal * COALESCE(v_customer.deposit_percentage, 0) / 100.0, 2);
-    END IF;
-  END IF;
-
-  v_status := CASE WHEN v_dep_required > 0 THEN 'awaiting_deposit' ELSE 'pending' END;
-
-  INSERT INTO wholesale_orders (
-    brand_id, customer_id, status, anticipated_pickup_date,
-    subtotal, deposit_required, deposit_paid, balance_due,
-    deposit_percentage, internal_notes, invoice_number, invoice_token
-  ) VALUES (
-    p_brand_id, p_customer_id, v_status, p_anticipated_pickup_date,
-    v_subtotal, v_dep_required, 0, v_subtotal,
-    p_deposit_percentage, p_notes,
-    v_inv_number, v_inv_token
-  ) RETURNING id INTO v_order_id;
-
-  -- Insert line items
-  IF jsonb_array_length(p_items) > 0 THEN
-    INSERT INTO wholesale_order_items (wholesale_order_id, product_id, quantity, unit_price, line_total)
-    SELECT
-      v_order_id,
-      (item->>'product_id')::UUID,
-      (item->>'quantity')::NUMERIC,
-      (item->>'unit_price')::NUMERIC,
-      ((item->>'quantity')::NUMERIC) * ((item->>'unit_price')::NUMERIC)
-    FROM jsonb_array_elements(p_items) AS item;
-  END IF;
-
-  RETURN jsonb_build_object(
-    'success', true,
-    'order_id', v_order_id,
-    'invoice_number', v_inv_number,
-    'status', v_status,
-    'deposit_required', v_dep_required,
-    'subtotal', v_subtotal
-  );
-END;
-$$;
-
-COMMIT;
-
-NOTIFY pgrst, 'reload schema';