feat: complete ShiftCraft — AI-powered shift scheduling SaaS

Complete implementation including:
- Landing page with hero, features, how-it-works, pricing
- Employee management (CRUD with soft delete)
- AI constraint parser (Anthropic Claude API)
- German labor law templates (ArbZG §3, §5, §9)
- HiGHS ILP solver for optimal fair schedules
- Schedule calendar result view (employee × date grid)
- Shift framework configuration (periods + shifts)
- Subscription tiers: Free / Pro / Business
- PocketBase setup script with collection creation + seed data
- .env.example with all required variables documented

Pages: employees, constraints (list/new/templates), schedules (list/new/[id]),
       settings (organization/shifts/billing), dashboard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -1,19 +1,30 @@
 ## General
-APP_NAME="Nuxt Pocketbase Starter"
-APP_ID="com.pocketbase.nuxt"
+APP_NAME="ShiftCraft"
+APP_ID="app.shiftcraft"
 NODE_ENV="development"
 
 
 ## Frontend
 NUXT_PUBLIC_APP_URL="http://localhost:3000"
+NUXT_PUBLIC_PB_URL="http://127.0.0.1:8090"
 NUXT_PUBLIC_POCKETBASE_URL="http://127.0.0.1:8090"
 NUXT_PUBLIC_RYBBIT_URL=""  # e.g. https://app.rybbit.io
 NUXT_PUBLIC_RYBBIT_SITE_ID=""     # Your Rybbit site ID
 
 
-## Backend
-SUPERUSER_EMAIL="mail@example.com"
-SUPERUSER_PW="!234Qwer"
+## Backend (PocketBase admin)
+PB_ADMIN_EMAIL="admin@shiftcraft.app"
+PB_ADMIN_PASSWORD="changeme123"
+SUPERUSER_EMAIL="admin@shiftcraft.app"
+SUPERUSER_PW="changeme123"
+
+## AI (Anthropic Claude — required for constraint parsing)
+ANTHROPIC_API_KEY="sk-ant-..."
+
+## Payments (Stripe — optional)
+STRIPE_SECRET_KEY=""
+STRIPE_PUBLISHABLE_KEY=""
+STRIPE_WEBHOOK_SECRET=""
 
 AUTH_GOOGLE_CLIENT_ID="<client-id>"
 AUTH_GOOGLE_CLIENT_SECRET="<client-secret>"