refactor: split admin/config.py into ai_config and db_config

backend/main.py

@@ -7,7 +7,7 @@ from slowapi.util import get_remote_address
 from . import models
 from .database import engine
 from .routers import items, operations, users, auth, sync, categories
-from .routers.admin import backups, config
+from .routers.admin import backups, ai_config, db_config
 from .logger import log
 from .scheduler import scheduler, sync_scheduler_config
 
@@ -91,7 +91,8 @@ app.include_router(auth.router)
 app.include_router(sync.router)
 app.include_router(categories.router)
 app.include_router(backups.router)
-app.include_router(config.router)
+app.include_router(ai_config.router)
+app.include_router(db_config.router)
 
 @app.on_event("startup")
 def startup_event():