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/126_founder_pain_log.sql

@@ -1,39 +0,0 @@
--- Migration 126: founder_pain_log table and platform view
-
-CREATE TABLE founder_pain_log (
-  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-  brand_id UUID REFERENCES brands(id) ON DELETE SET NULL,
-  severity TEXT NOT NULL CHECK (severity IN ('low', 'medium', 'high', 'critical')),
-  category TEXT NOT NULL, -- e.g. 'deployment', 'payment', 'data', 'operations'
-  title TEXT NOT NULL,
-  description TEXT,
-  status TEXT NOT NULL DEFAULT 'open' CHECK (status IN ('open', 'acknowledged', 'resolved')),
-  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-  resolved_at TIMESTAMPTZ,
-  resolved_by UUID REFERENCES admin_users(id) ON DELETE SET NULL
-);
-
-CREATE VIEW founder_pain_log_platform AS
-SELECT
-  fpl.id,
-  fpl.brand_id,
-  fpl.severity,
-  fpl.category,
-  fpl.title,
-  fpl.description,
-  fpl.status,
-  fpl.created_at,
-  fpl.resolved_at,
-  fpl.resolved_by,
-  b.name AS brand_name,
-  b.slug AS brand_slug
-FROM founder_pain_log fpl
-LEFT JOIN brands b ON b.id = fpl.brand_id
-ORDER BY
-  CASE fpl.severity
-    WHEN 'critical' THEN 1
-    WHEN 'high' THEN 2
-    WHEN 'medium' THEN 3
-    WHEN 'low' THEN 4
-  END,
-  fpl.created_at DESC;