diff --git a/AIStudyApp/AIStudyApp/Core/Services/APIService.swift b/AIStudyApp/AIStudyApp/Core/Services/APIService.swift
index 1c8d0b9..59a53a6 100644
--- a/AIStudyApp/AIStudyApp/Core/Services/APIService.swift
+++ b/AIStudyApp/AIStudyApp/Core/Services/APIService.swift
@@ -234,12 +234,6 @@ class LearningSessionService {
         return try await client.request("/learning-sessions/\(id)/end", method: "POST")
     }
 
-    func list(page: Int = 1, limit: Int = 20) async throws -> [LearningSession] {
-        return try await client.request("/learning-sessions", queryItems: [
-            URLQueryItem(name: "page", value: String(page)),
-            URLQueryItem(name: "limit", value: String(limit)),
-        ])
-    }
 }
 
 // MARK: - Review
@@ -278,9 +272,7 @@ class FocusItemService {
     }
 
     func update(id: String, masteryScore: Int? = nil, title: String? = nil) async throws -> FocusItem {
-        var body: [String: Any] = [:]
-        if let s = masteryScore { body["masteryScore"] = s }
-        if let t = title { body["title"] = t }
+        let body = FocusItemUpdateRequest(masteryScore: masteryScore, title: title)
         return try await client.request("/focus-items/\(id)", method: "PATCH", body: body)
     }
 
@@ -483,6 +475,11 @@ struct NotificationPreferences: Codable {
     var systemNotice: Bool?
 }
 
+struct FocusItemUpdateRequest: Codable {
+    let masteryScore: Int?
+    let title: String?
+}
+
 struct FocusItemCompleteRequest: Codable {
     let id: String
 }