diff --git a/apps/api/src/routes/content.ts b/apps/api/src/routes/content.ts
index 635a549..1fa94b7 100644
--- a/apps/api/src/routes/content.ts
+++ b/apps/api/src/routes/content.ts
@@ -109,6 +109,12 @@ contentRoutes.get("/messages", requireAuth, async (c) => {
   }))
 })
 
+/**
+ * 发站内信。**目前没有任何前端在调用它** —— 后台那个页面
+ * （apps/web/src/admin/communication/messages.vue）两代前端都只是一句
+ * 「未完待续」的占位，ojnext 里定义过一个 createMessage 但同样零调用，
+ * 已在前端删掉。端点本身是完整实现的，要接 UI 从这里开始。
+ */
 contentRoutes.post("/messages", requireSuperAdmin, async (c) => {
   const user = c.get("user")!
   const parsed = createMessageRequestSchema.safeParse(await c.req.json().catch(() => null))
diff --git a/apps/web/src/admin/api.ts b/apps/web/src/admin/api.ts
index 42ee66f..2b6613c 100644
--- a/apps/web/src/admin/api.ts
+++ b/apps/web/src/admin/api.ts
@@ -110,10 +110,6 @@ export function getProblem(id: string | number) {
   return api.get<AdminProblem>(`admin/problems/${id}`)
 }
 
-export function getContestProblem(id: number) {
-  return api.get<AdminProblem>(`admin/problems/${id}`)
-}
-
 // 标签管理
 export function getTagAdminList(keyword = "") {
   return api.get<AdminTag[]>("admin/problem-tags", { params: { keyword } })
diff --git a/apps/web/src/oj/api.ts b/apps/web/src/oj/api.ts
index 9a9d003..cbda74d 100644
--- a/apps/web/src/oj/api.ts
+++ b/apps/web/src/oj/api.ts
@@ -270,18 +270,6 @@ export function getAnnouncement(id: number) {
   return api.get<Announcement>(`announcements/${id}`)
 }
 
-export function createMessage(data: {
-  recipient: number
-  message: string
-  submission: string
-}) {
-  return api.post("messages", {
-    recipientId: data.recipient,
-    message: data.message,
-    submissionId: data.submission,
-  })
-}
-
 export function getMessageList(offset = 0, limit = 10) {
   // language 的收窄同 getSubmissions，见那里的说明
   return api.get<{ results: Message[]; total: number }>("messages", {
diff --git a/apps/web/src/utils/constants.ts b/apps/web/src/utils/constants.ts
index 46d1641..afe47f9 100644
--- a/apps/web/src/utils/constants.ts
+++ b/apps/web/src/utils/constants.ts
@@ -132,11 +132,6 @@ export const CONTEST_STATUS: {
   },
 }
 
-export const CONTEST_TYPE = {
-  PUBLIC: "Public",
-  PRIVATE: "Password Protected",
-}
-
 export const USER_TYPE = {
   REGULAR_USER: "Regular User",
   STUDENT_ADMIN: "Student Admin",
@@ -185,18 +180,6 @@ export const SOURCES = {
   SQL: "",
 } as const
 
-export const LANGUAGE_ID = {
-  C: 50,
-  "C++": 54,
-  Java: 62,
-  Python3: 71,
-  Python2: 0,
-  JavaScript: 0,
-  Golang: 0,
-  Flowchart: 0,
-  SQL: 0,
-} as const
-
 export const LANGUAGE_FORMAT_VALUE = {
   C: "c",
   "C++": "cpp",