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/080_communication_segments.sql

@@ -1,89 +0,0 @@
--- Migration 080: communication_segments table for reusable audience segments
--- Replaces ad-hoc JSONB audience_rules with named, saved segments
-
-CREATE TABLE communication_segments (
-  id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-  brand_id      UUID REFERENCES brands NOT NULL,
-  name          TEXT NOT NULL,
-  description   TEXT,
-  rules         JSONB NOT NULL DEFAULT '{}',
-  -- rules shape mirrors AudienceRules:
-  -- { target, stop_id, date_from, date_to, zip_codes, city,
-  --   order_history, days_back, product_id, customer_ids }
-  created_by    UUID,
-  created_at    TIMESTAMPTZ DEFAULT now(),
-  updated_at    TIMESTAMPTZ DEFAULT now()
-);
-
--- Brand scoping is enforced at the application layer (server actions).
--- The SECURITY DEFINER RPCs bypass RLS, so no policies are needed.
--- If RLS is needed later, add permissive policies here.
-ALTER TABLE communication_segments DISABLE ROW LEVEL SECURITY;
-
--- RPCs for segments CRUD
-CREATE OR REPLACE FUNCTION get_communication_segments(p_brand_id UUID)
-RETURNS JSONB
-LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
-AS $$
-BEGIN
-  RETURN jsonb_build_object(
-    'segments', (
-      SELECT COALESCE(jsonb_agg(s.*), '[]'::jsonb)
-      FROM (
-        SELECT id, brand_id, name, description, rules,
-               created_by, created_at, updated_at
-        FROM communication_segments
-        WHERE brand_id = p_brand_id
-        ORDER BY name
-      ) s
-    )
-  );
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION upsert_communication_segment(
-  p_brand_id    UUID,
-  p_name        TEXT,
-  p_description TEXT DEFAULT NULL,
-  p_rules       JSONB DEFAULT '{}',
-  p_created_by  UUID DEFAULT NULL,
-  p_id          UUID DEFAULT NULL
-)
-RETURNS JSONB
-LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
-AS $$
-DECLARE
-  v_result JSONB;
-BEGIN
-  INSERT INTO communication_segments (id, brand_id, name, description, rules, created_by, updated_at)
-  VALUES (
-    COALESCE(p_id, gen_random_uuid()),
-    p_brand_id,
-    p_name,
-    p_description,
-    p_rules,
-    p_created_by,
-    now()
-  )
-  ON CONFLICT (id) DO UPDATE SET
-    name        = EXCLUDED.name,
-    description = EXCLUDED.description,
-    rules       = EXCLUDED.rules,
-    updated_at  = now()
-  RETURNING to_jsonb(communication_segments.*) INTO v_result;
-
-  RETURN v_result;
-END;
-$$;
-
-CREATE OR REPLACE FUNCTION delete_communication_segment(p_segment_id UUID, p_brand_id UUID)
-RETURNS JSONB
-LANGUAGE plpgsql SECURITY DEFINER SET search_path = public
-AS $$
-BEGIN
-  DELETE FROM communication_segments
-  WHERE id = p_segment_id AND brand_id = p_brand_id;
-
-  RETURN jsonb_build_object('success', true);
-END;
-$$;