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>

package.json

@@ -20,6 +20,7 @@
     "capacitor:copy:after": "cp creds/fcm-google-services.json android/app/google-services.json"
   },
   "dependencies": {
+    "@anthropic-ai/sdk": "^0.90.0",
     "@capacitor/android": "^8.3.1",
     "@capacitor/app": "^8.1.0",
     "@capacitor/core": "^8.3.1",
@@ -32,6 +33,7 @@
     "@nuxtjs/i18n": "10.2.4",
     "@pinia/nuxt": "0.11.3",
     "dotenv": "^17.4.2",
+    "highs": "^1.8.0",
     "nuxt": "^4.4.2",
     "pocketbase": "^0.26.8",
     "tailwindcss": "^4.2.2",