avatar (#14440)

* avatar

* refactor avatar display: unify rendering and resolve at use time

  - Extract buildAvatarWidget() in common.dart to share avatar rendering
    logic across desktop settings, desktop CM and mobile CM
  - Add resolve_avatar_url() in Rust, exposed via FFI (SyncReturn),
    to resolve relative avatar paths (e.g. "/avatar/xxx") to absolute URLs
  - Store avatar as-is in local config, only resolve when displaying
    (settings page) or sending (LoginRequest)
  - Resolve avatar in LoginRequest before sending to remote peer
  - Add error handling for network image load failures
  - Guard against empty client.name[0] crash
  - Show avatar in mobile settings page account tile

Signed-off-by: 21pages <sunboeasy@gmail.com>

* web: implement mainResolveAvatarUrl via js getByName

Signed-off-by: 21pages <sunboeasy@gmail.com>

* increase ipc Data enum size limit to 120 bytes

Signed-off-by: 21pages <sunboeasy@gmail.com>

---------

Signed-off-by: 21pages <sunboeasy@gmail.com>
Co-authored-by: 21pages <sunboeasy@gmail.com>

flutter/lib/models/server_model.dart

@@ -820,6 +820,7 @@ class Client {
   bool isTerminal = false;
   String portForward = "";
   String name = "";
+  String avatar = "";
   String peerId = ""; // peer user's id,show at app
   bool keyboard = false;
   bool clipboard = false;
@@ -847,6 +848,7 @@ class Client {
     isTerminal = json['is_terminal'] ?? false;
     portForward = json['port_forward'];
     name = json['name'];
+    avatar = json['avatar'] ?? '';
     peerId = json['peer_id'];
     keyboard = json['keyboard'];
     clipboard = json['clipboard'];
@@ -870,6 +872,7 @@ class Client {
     data['is_terminal'] = isTerminal;
     data['port_forward'] = portForward;
     data['name'] = name;
+    data['avatar'] = avatar;
     data['peer_id'] = peerId;
     data['keyboard'] = keyboard;
     data['clipboard'] = clipboard;

flutter/lib/models/user_model.dart

@@ -17,6 +17,7 @@ bool refreshingUser = false;
 class UserModel {
   final RxString userName = ''.obs;
   final RxString displayName = ''.obs;
+  final RxString avatar = ''.obs;
   final RxBool isAdmin = false.obs;
   final RxString networkError = ''.obs;
   bool get isLogin => userName.isNotEmpty;
@@ -33,6 +34,7 @@ class UserModel {
     }
     return '$preferred (@$username)';
   }
+
   WeakReference<FFI> parent;
 
   UserModel(this.parent) {
@@ -114,6 +116,7 @@ class UserModel {
     if (userInfo != null) {
       userName.value = (userInfo['name'] ?? '').toString();
       displayName.value = (userInfo['display_name'] ?? '').toString();
+      avatar.value = (userInfo['avatar'] ?? '').toString();
     }
   }
 
@@ -126,11 +129,13 @@ class UserModel {
     }
     userName.value = '';
     displayName.value = '';
+    avatar.value = '';
   }
 
   _parseAndUpdateUser(UserPayload user) {
     userName.value = user.name;
     displayName.value = user.displayName;
+    avatar.value = user.avatar;
     isAdmin.value = user.isAdmin;
     bind.mainSetLocalOption(key: 'user_info', value: jsonEncode(user));
     if (isWeb) {