Fix TypeScript compilation and add graceful Supabase client fallbacks in beauty-assistant edge function

[Copilot]

The beauty-assistant edge function had TypeScript compilation errors from unresolvable Deno globals/URL imports, and two createClient calls in the website chat path that would crash silently when SUPABASE_SERVICE_ROLE_KEY was absent.

TypeScript fixes (supabase/functions/beauty-assistant/index.ts)

• declare const Deno — ambient declaration so Deno.env.get() is type-safe without Deno lib types
• @ts-expect-error on both URL imports (deno.land/std, esm.sh) — resolved at runtime by Supabase Edge, not by tsc

Graceful client creation — website chat path

Replaced non-null assertions with conditional construction, matching the existing webhook-path pattern:

// Before — crashes silently when SUPABASE_SERVICE_ROLE_KEY absent
const serviceClient = createClient(
  Deno.env.get("SUPABASE_URL")!,
  Deno.env.get("SUPABASE_SERVICE_ROLE_KEY")!,
);

// After — falls back to anon key, skips entirely if URL unset
const supabaseUrl = Deno.env.get("SUPABASE_URL");
const supabaseKey = Deno.env.get("SUPABASE_SERVICE_ROLE_KEY") ?? Deno.env.get("SUPABASE_ANON_KEY");
if (supabaseUrl && supabaseKey) {
  const productContextClient = createClient(supabaseUrl, supabaseKey);
  // ...
}

Applied to both productContextClient and the adminClient in the campaignSource telemetry block.

New npm scripts + utility scripts

Script	Command	Purpose
health	node scripts/health-check.js	Frontend health endpoint check
brain	node scripts/brain-check.js	Beauty Assistant edge function check (2xx-only success; 401/405 surface misconfiguration)
sync:check	node scripts/sync-check.js	Concurrent frontend + brain check via res.ok

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