Remove user mention avatar helpers

Author: YinMo19

docs/api/models/users-members.md

@@ -17,7 +17,7 @@ pub struct User {
 }
 ```
 
-`Snowflake` is a type alias for `String`. Use `User::avatar_url()` to build a CDN URL from the hash, and `User::mention()` for `<@!id>`.
+`Snowflake` is a type alias for `String`. Inspect `avatar` and `id` directly when building UI links or message content.
 
 ## `Member`
 

docs/zh/api/models/users-members.md

@@ -17,7 +17,7 @@ pub struct User {
 }
 ```
 
-`Snowflake` 是 `String` 的类型别名。`User::avatar_url()` 用哈希拼出 CDN 地址，`User::mention()` 返回 `<@!id>` 的 mention 串。
+`Snowflake` 是 `String` 的类型别名。构造 UI 链接或消息内容时，直接检查 `avatar` 与 `id` 字段。
 
 ## `Member`
 

src/models/user/member.rs

@@ -22,18 +22,6 @@ pub struct Member {
     pub mute: bool,
 }
 
-impl Member {
-    /// Gets the member's mention string.
-    pub fn mention(&self) -> String {
-        self.user.mention()
-    }
-
-    /// Gets the member's avatar URL.
-    pub fn avatar_url(&self) -> Option<String> {
-        self.user.avatar_url()
-    }
-}
-
 impl HasId for Member {
     fn id(&self) -> Option<&Snowflake> {
         Some(&self.user.id)

src/models/user/model.rs

@@ -25,27 +25,6 @@ pub struct User {
     pub union_user_account: String,
 }
 
-impl User {
-    /// Gets the user's avatar URL if they have one.
-    ///
-    /// Returns the full URL to the user's avatar image.
-    pub fn avatar_url(&self) -> Option<String> {
-        (!self.avatar.is_empty()).then(|| {
-            format!(
-                "https://thirdqq.qlogo.cn/headimg_dl?dst_uin={}&spec=640",
-                self.id
-            )
-        })
-    }
-
-    /// Gets the user's mention string.
-    ///
-    /// Returns a string that can be used to mention this user in messages.
-    pub fn mention(&self) -> String {
-        format!("<@!{}>", self.id)
-    }
-}
-
 impl HasId for User {
     fn id(&self) -> Option<&Snowflake> {
         Some(&self.id)

src/models/user/tests.rs

@@ -32,7 +32,6 @@ fn user_uses_required_zero_value_fields() {
     assert!(!user.bot);
     assert_eq!(user.union_openid, "");
     assert_eq!(user.union_user_account, "");
-    assert!(user.avatar_url().is_none());
 }
 
 #[test]
@@ -53,7 +52,6 @@ fn user_keeps_official_json_shape() {
     assert_eq!(value["bot"], true);
     assert_eq!(value["union_openid"], "union-openid");
     assert_eq!(value["union_user_account"], "union-account");
-    assert!(user.avatar_url().is_some());
 }
 
 #[test]
@@ -77,12 +75,6 @@ fn user_from_bot_info_preserves_union_fields() {
     assert_eq!(user.union_user_account, "UNION_ACCOUNT_XXXXXX");
 }
 
-#[test]
-fn test_user_mention() {
-    let user = test_user("123456789", "TestUser");
-    assert_eq!(user.mention(), "<@!123456789>");
-}
-
 #[test]
 fn test_member_name_fallback() {
     let user = test_user("123456789", "TestUser");