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>

nuxt.config.ts

@@ -36,9 +36,15 @@ export default defineNuxtConfig({
   css: ['~/assets/css/main.css'],
 
   runtimeConfig: {
+    pbAdminEmail: process.env.PB_ADMIN_EMAIL || '',
+    pbAdminPassword: process.env.PB_ADMIN_PASSWORD || '',
+    anthropicApiKey: process.env.ANTHROPIC_API_KEY || '',
+    stripeSecretKey: process.env.STRIPE_SECRET_KEY || '',
+    stripeWebhookSecret: process.env.STRIPE_WEBHOOK_SECRET || '',
     public: {
       appUrl: 'http://localhost:3000',
-      pocketbaseUrl: 'http://127.0.0.1:8090',
+      pocketbaseUrl: process.env.NUXT_PUBLIC_PB_URL || 'http://127.0.0.1:8090',
+      stripePublishableKey: process.env.STRIPE_PUBLISHABLE_KEY || '',
       rybbitScriptUrl: '',
       rybbitSiteId: ''
     }