Add landing page, referral system, usage quotas, search API management, and yearly pricing

- Separate workspace landing from login for better UX
- Referral system rewards both parties with Pro days
- Quota enforcement prevents abuse without breaking endpoints
- 7-day free trial with auto-downgrade on expiry
- Admin-managed search provider config (SearXNG, Bing)
- 15% discount on annual subscriptions
- MCP search server wrapping opencode search
- Fix discovery module field name mismatch causing 422

backend/app/main.py

@@ -54,7 +54,7 @@ async def health():
     return {"status": "ok", "app": settings.APP_NAME, "version": "1.0.0"}
 
 
-from app.api.v1 import auth, marketing, translate, customer, quotation, whatsapp, product, exchange, push, admin, analytics, teams, onboarding, notification, feedback, payment, interaction, silent_pattern, training, followup, ai_assistant, discovery, certification, invoice
+from app.api.v1 import auth, marketing, translate, customer, quotation, whatsapp, product, exchange, push, admin, analytics, teams, onboarding, notification, feedback, payment, interaction, silent_pattern, training, followup, ai_assistant, discovery, certification, invoice, usage, referral, admin_search, search
 
 app.include_router(auth.router, prefix="/api/v1/auth", tags=["auth"])
 app.include_router(marketing.router, prefix="/api/v1/marketing", tags=["marketing"])
@@ -81,6 +81,10 @@ app.include_router(ai_assistant.router, prefix="/api/v1/ai", tags=["ai-assistant
 app.include_router(discovery.router, prefix="/api/v1/discovery", tags=["discovery"])
 app.include_router(certification.router, prefix="/api/v1/certification", tags=["certification"])
 app.include_router(invoice.router, prefix="/api/v1/invoices", tags=["invoices"])
+app.include_router(usage.router, prefix="/api/v1/usage", tags=["usage"])
+app.include_router(referral.router, prefix="/api/v1/referral", tags=["referral"])
+app.include_router(admin_search.router, prefix="/api/v1/admin", tags=["admin"])
+app.include_router(search.router, prefix="/api/v1/search", tags=["search"])
 
 
 if __name__ == "__main__":