fix: remove unused imports and add type annotation for Swagger UI merge

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/modes/server/api/mod.rs

@@ -2,7 +2,7 @@ pub mod item;
 pub mod status;
 
 use axum::{
-    routing::{get, post, delete},
+    routing::get,
     Router,
 };
 
@@ -54,6 +54,6 @@ pub fn add_routes(router: Router<AppState>) -> Router<AppState> {
 
 pub fn add_docs_routes(router: Router<AppState>) -> Router<AppState> {
     router
-        .merge(SwaggerUi::new("/swagger-ui")
+        .merge::<Router<AppState>>(SwaggerUi::new("/swagger-ui")
                .url("/api-docs/openapi.json", ApiDoc::openapi()).into())
 }