docs: real README, current phase status in CLAUDE.md, complete env example

- README was untouched create-next-app boilerplate
- CLAUDE.md still claimed "Phase 0 not started"; all phases 0-6 complete
- .env.local.example was missing SUPABASE_SERVICE_ROLE_KEY, Resend, and
  Meta WhatsApp variables added in later phases

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CPf5Rc8QPx6V8KLEEgfKEQ

.env.local.example

@@ -2,6 +2,18 @@
 NEXT_PUBLIC_SUPABASE_URL=https://your-project-ref.supabase.co
 NEXT_PUBLIC_SUPABASE_ANON_KEY=your-anon-key-here
 NEXT_PUBLIC_APP_URL=http://localhost:3000
+NEXT_PUBLIC_SITE_URL=http://localhost:3000
 CRON_SECRET=<generate with: openssl rand -hex 32>
+
+# Server-side only — never expose to the client
+SUPABASE_SERVICE_ROLE_KEY=<required for admin user invites (/admin)>
+RESEND_API_KEY=re_...
+RESEND_FROM_EMAIL=alerts@yourdomain.com
+
+# AI keys — optional here; preferred location is the app_settings table (/hse/settings)
 ANTHROPIC_API_KEY=sk-ant-...
 VOYAGE_API_KEY=pa-...
+
+# Meta WhatsApp Cloud API — optional here; preferred location is app_settings
+META_WHATSAPP_PHONE_NUMBER_ID=
+META_WHATSAPP_ACCESS_TOKEN=