fix: resolve compilation errors by adding missing imports and fixing schema definitions

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

src/modes/server/common.rs

@@ -8,6 +8,7 @@ use std::str::FromStr;
 use std::sync::Arc;
 use std::time::Instant;
 use tokio::sync::Mutex;
+use utoipa::ToSchema;
 
 #[derive(Debug, Clone)]
 pub struct ServerConfig {
@@ -33,14 +34,14 @@ pub struct AppState {
     pub password: Option<String>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, ToSchema)]
 pub struct ApiResponse<T> {
     pub success: bool,
     pub data: Option<T>,
     pub error: Option<String>,
 }
 
-#[derive(Serialize, Deserialize)]
+#[derive(Serialize, Deserialize, ToSchema)]
 pub struct ItemInfo {
     pub id: i64,
     pub ts: String,