diff --git a/app/main.py b/app/main.py
index c2ed2e8..98c5d31 100644
--- a/app/main.py
+++ b/app/main.py
@@ -24,7 +24,9 @@ from app.core.monitoring import record_error, record_request
 from app.core.service_container import get_container
 from app.plugins.registry import get_registry
 from app.routes import (
+    addresses,
     ai_copilot,
+    audit,
     auth,
     companies,
     contacts,
@@ -157,6 +159,18 @@ async def lifespan(app: FastAPI):
 
         await db.commit()
 
+    # Seed default data (EUR currency, 19%/7% tax rates) for all tenants
+    from app.core.seeds import seed_default_data
+
+    async with async_session() as db:
+        try:
+            await seed_default_data(db)
+            await db.commit()
+            logger.info("Default data seeding completed")
+        except Exception as exc:
+            logger.warning(f"Default data seeding failed: {exc}")
+            await db.rollback()
+
     yield
 
     await close_engine()
@@ -196,8 +210,10 @@ def create_app() -> FastAPI:
     app.include_router(sequences.router)
     app.include_router(system_settings.router)
     app.include_router(attachments.router)
+    app.include_router(addresses.router)
+    app.include_router(audit.router)
 
-    # ── Register plugin routes (before SPA catch-all) ────────────────
+    # ── Register plugin routes (before SPA catch-all) ──────────────────
     registry = get_registry()
     try:
         registry.discover_builtins()
@@ -216,7 +232,7 @@ def create_app() -> FastAPI:
     except Exception as exc:
         logger.warning(f"Plugin discovery failed: {exc}")
 
-    # ── Serve frontend static files (SPA) ────────────────────────────
+    # ── Serve frontend static files (SPA) ──────────────────────────────
     # Mount built frontend assets (JS, CSS, images)
     frontend_dist = os.path.join(os.path.dirname(__file__), "..", "frontend", "dist")
     if os.path.isdir(frontend_dist):