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/084_shipments.sql

@@ -1,73 +0,0 @@
--- Migration 084: FedEx Shipments Table
--- Stores created FedEx shipment records with label URL, tracking, and special services.
-
-CREATE TABLE IF NOT EXISTS public.shipments (
-  id                       UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-  order_id                 UUID NOT NULL REFERENCES orders ON DELETE CASCADE,
-
-  -- Carrier details
-  carrier                  TEXT NOT NULL DEFAULT 'fedex',
-  service_type             TEXT NOT NULL,          -- FEDEX_OVERNIGHT, FEDEX_2_DAY_AIR, FEDEX_GROUND, etc.
-  tracking_number          TEXT,
-  label_url                TEXT,                   -- FedEx label PDF URL
-  rate_charged             NUMERIC(10, 2),        -- Actual rate charged by FedEx (cents)
-
-  -- Delivery estimates
-  estimated_delivery_date  DATE,
-
-  -- Special handling applied
-  is_refrigerated         BOOLEAN NOT NULL DEFAULT FALSE,
-  is_fragile               BOOLEAN NOT NULL DEFAULT FALSE,
-  handling_notes           TEXT,                  -- Custom per-shipment notes
-
-  -- Status
-  status                   TEXT NOT NULL DEFAULT 'created', -- created | label_voided | cancelled
-  fedex_shipment_id        TEXT,                  -- FedEx internal shipment ID (for voiding)
-
-  -- Audit
-  created_at               TIMESTAMPTZ NOT NULL DEFAULT now(),
-  updated_at               TIMESTAMPTZ NOT NULL DEFAULT now(),
-  created_by               UUID REFERENCES admin_users(user_id)
-);
-
-ALTER TABLE public.shipments ENABLE ROW LEVEL SECURITY;
-
--- Shipments visible to brand admins and platform admins for the order's brand
-CREATE POLICY brand_admin_view_shipments ON public.shipments
-  FOR SELECT
-  USING (
-    EXISTS (
-      SELECT 1 FROM orders o
-      WHERE o.id = shipments.order_id
-        AND o.brand_id = (
-          SELECT brand_id FROM admin_users WHERE user_id = auth.uid() LIMIT 1
-        )
-    )
-    OR EXISTS (
-      SELECT 1 FROM admin_users au
-      WHERE au.user_id = auth.uid()
-        AND au.role = 'platform_admin'
-    )
-  );
-
-CREATE POLICY brand_admin_manage_shipments ON public.shipments
-  FOR ALL
-  USING (
-    EXISTS (
-      SELECT 1 FROM orders o
-      WHERE o.id = shipments.order_id
-        AND o.brand_id = (
-          SELECT brand_id FROM admin_users WHERE user_id = auth.uid() LIMIT 1
-        )
-        AND EXISTS (
-          SELECT 1 FROM admin_users au
-          WHERE au.user_id = auth.uid()
-            AND au.brand_id = o.brand_id
-            AND au.role IN ('brand_admin', 'platform_admin')
-        )
-    )
-  );
-
-CREATE INDEX IF NOT EXISTS shipments_order_idx         ON public.shipments (order_id);
-CREATE INDEX IF NOT EXISTS shipments_tracking_idx     ON public.shipments (tracking_number);
-CREATE INDEX IF NOT EXISTS shipments_status_idx       ON public.shipments (status);