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/108_lot_quantity_tracking.sql

@@ -1,77 +0,0 @@
--- 108_lot_quantity_tracking.sql
--- Add quantity_used_lbs tracking to harvest_lots + wire get_lot_orders + mark_lot_used_in_order
-
-ALTER TABLE harvest_lots ADD COLUMN IF NOT EXISTS quantity_used_lbs NUMERIC(12,2) DEFAULT 0 NOT NULL;
-
-DROP FUNCTION IF EXISTS public.get_lot_orders(uuid);
-DROP FUNCTION IF EXISTS public.mark_lot_used_in_order(uuid, uuid, text, uuid);
-
-CREATE OR REPLACE FUNCTION public.get_lot_orders(p_lot_id uuid)
-RETURNS TABLE(
-  id uuid,
-  customer_name text,
-  order_date text,
-  stop_name text,
-  item_quantity numeric,
-  item_notes text,
-  fulfillment text,
-  lot_quantity_used numeric
-)
-LANGUAGE plpgsql
-SECURITY DEFINER
-AS $function$
-BEGIN
-  RETURN QUERY
-  SELECT
-    o.id,
-    COALESCE(c.name, c.email) as customer_name,
-    TO_CHAR(o.created_at, 'MM/DD/YYYY') as order_date,
-    s.name as stop_name,
-    oi.quantity::NUMERIC as item_quantity,
-    oi.notes as item_notes,
-    oi.fulfillment,
-    oi.quantity::NUMERIC as lot_quantity_used
-  FROM order_items oi
-  JOIN orders o ON o.id = oi.order_id
-  LEFT JOIN customers c ON c.id = o.customer_id
-  LEFT JOIN stops s ON s.id = o.stop_id
-  WHERE oi.lot_id = p_lot_id
-     OR oi.lot_number = (SELECT lot_number FROM harvest_lots WHERE id = p_lot_id);
-END;
-$function$;
-
-CREATE OR REPLACE FUNCTION public.mark_lot_used_in_order(
-  p_lot_id uuid,
-  p_order_id uuid,
-  p_quantity_to_add numeric DEFAULT NULL,
-  p_notes text DEFAULT NULL::text,
-  p_admin_id uuid DEFAULT NULL::uuid
-)
-RETURNS boolean
-LANGUAGE plpgsql
-SECURITY DEFINER
-AS $function$
-DECLARE
-  v_lot_number text;
-  v_qty numeric;
-BEGIN
-  SELECT lot_number INTO v_lot_number FROM harvest_lots WHERE id = p_lot_id;
-
-  IF p_quantity_to_add IS NOT NULL AND p_quantity_to_add > 0 THEN
-    v_qty := p_quantity_to_add;
-  ELSE
-    SELECT COALESCE(SUM(oi.quantity), 0) INTO v_qty
-    FROM order_items oi
-    WHERE oi.lot_id = p_lot_id OR oi.lot_number = v_lot_number;
-  END IF;
-
-  UPDATE harvest_lots
-  SET quantity_used_lbs = COALESCE(quantity_used_lbs, 0) + v_qty
-  WHERE id = p_lot_id;
-
-  INSERT INTO harvest_lot_events (lot_id, event_type, event_time, notes, created_by)
-  VALUES (p_lot_id, 'marked_used', NOW(), p_notes, p_admin_id);
-
-  RETURN TRUE;
-END;
-$function$;