Demo business removal

Removed the demo business as its easier to just provision one manually.

.env.business.example

@@ -2,10 +2,10 @@
 # stacks/infra/compose.yaml for the one-time setup this depends on
 # (creating this business's database on the shared MySQL server) and
 # stacks/<slug>/compose.yaml for how this file is used. Copy this to
-# `stacks/<slug>/.env` (e.g. `stacks/demo-business/.env` — kept out of
-# git, see .gitignore) per business and fill in real values. Nothing here
-# is a real credential. Normally the management UI (manager/) generates
-# this file for you — this template is for the by-hand setup path.
+# `stacks/<slug>/.env` (kept out of git, see .gitignore) per business and
+# fill in real values. Nothing here is a real credential. Normally the
+# management UI (manager/) generates this file for you — this template is
+# for the by-hand setup path.
 #
 # The app starts and runs a complete first-install flow with ONLY the
 # "Required for basic startup" section below filled in — every other
@@ -16,12 +16,12 @@
 # Manager-only bookkeeping (shown on the dashboard/edit screen, editable
 # there) — the app itself never reads this; its own business name lives
 # in the database, set via /install.
-BUSINESS_NAME="Demo Business"
+BUSINESS_NAME="Example Business"
 # The public domain this business is served on — must match the .caddy
 # site file's own domain (see stacks/infra/sites/.gitkeep) and that
 # domain's real DNS (pointed at the VPS) before Caddy can issue a
 # certificate for it.
-DOMAIN="demo-business.example.com"
+DOMAIN="example-business.example.com"
 
 # The app reaches MySQL via the shared infra's service hostname
 # `next-chair-mysql`, never `localhost` — see stacks/infra/compose.yaml.
@@ -31,14 +31,14 @@ DOMAIN="demo-business.example.com"
 # tells the app what to connect as.
 DATABASE_HOST="next-chair-mysql"
 DATABASE_PORT="3306"
-DATABASE_NAME="demo_business"
-DATABASE_USER="demo_business"
+DATABASE_NAME="example_business"
+DATABASE_USER="example_business"
 DATABASE_PASSWORD="replace-me"
 # Generate with: npx auth secret
 AUTH_SECRET="replace-me-with-a-32-byte-random-string"
 # Auth.js needs to trust the host it's served from when not on localhost:3000.
 AUTH_TRUST_HOST="true"
-NEXT_PUBLIC_APP_URL="https://demo-business.example.com"
+NEXT_PUBLIC_APP_URL="https://example-business.example.com"
 # One-time setup token the installation wizard (/install) requires before
 # it will create the first business/administrator — generate with:
 # openssl rand -hex 32
@@ -51,7 +51,7 @@ CRON_SECRET="replace-me"
 # Platform-level account with every Owner permission for THIS business.
 # Not run automatically by this compose file (that's a Docker-entrypoint-
 # only behaviour, see docker/entrypoint.sh) — run it manually, once:
-#   docker exec -it next-chair-demo-business npx tsx scripts/ensure-super-admin.ts
+#   docker exec -it next-chair-example-business npx tsx scripts/ensure-super-admin.ts
 # Leave SUPER_ADMIN_EMAIL blank to skip entirely and use the /install
 # wizard's own administrator account instead.
 SUPER_ADMIN_EMAIL=""
@@ -68,7 +68,7 @@ AUTH_GOOGLE_SECRET=""
 # OAuth client from AUTH_GOOGLE_ID/SECRET above (different scopes).
 GOOGLE_CALENDAR_CLIENT_ID=""
 GOOGLE_CALENDAR_CLIENT_SECRET=""
-GOOGLE_CALENDAR_REDIRECT_URI="https://demo-business.example.com/api/staff/calendar/google/callback"
+GOOGLE_CALENDAR_REDIRECT_URI="https://example-business.example.com/api/staff/calendar/google/callback"
 # Encrypts stored refresh tokens at rest — generate with: openssl rand -hex 32
 CALENDAR_TOKEN_ENCRYPTION_KEY=""