Fix typo: Rustdesk to RustDesk in Russian README (#14468)

* fix(flutter): reduce accidental horizontal trackpad scrolling during vertical pan

Signed-off-by: fufesou <linlong1266@gmail.com>

* refact: comments

Signed-off-by: fufesou <linlong1266@gmail.com>

---------

Signed-off-by: fufesou <linlong1266@gmail.com>

docs/README-RU.md

@@ -167,7 +167,7 @@ target/release/rustdesk
 - **[src/ui](https://github.com/rustdesk/rustdesk/tree/master/src/ui)**: графический пользовательский интерфейс на Sciter (устаревшее)
 - **[src/server](https://github.com/rustdesk/rustdesk/tree/master/src/server)**: сервисы аудио, буфера обмена, ввода, видео и сетевых подключений
 - **[src/client.rs](https://github.com/rustdesk/rustdesk/tree/master/src/client.rs)**: одноранговое соединение
-- **[src/rendezvous_mediator.rs](https://github.com/rustdesk/rustdesk/tree/master/src/rendezvous_mediator.rs)**: связь с [сервером Rustdesk](https://github.com/rustdesk/rustdesk-server), ожидает удаленного прямого (через TCP hole punching) или ретранслируемого соединения
+- **[src/rendezvous_mediator.rs](https://github.com/rustdesk/rustdesk/tree/master/src/rendezvous_mediator.rs)**: связь с [сервером RustDesk](https://github.com/rustdesk/rustdesk-server), ожидает удаленного прямого (через TCP hole punching) или ретранслируемого соединения
 - **[src/platform](https://github.com/rustdesk/rustdesk/tree/master/src/platform)**: специфичный для платформы код
 - **[flutter](https://github.com/rustdesk/rustdesk/tree/master/flutter)**: код Flutter для ПК-версии и мобильных устройств
 - **[flutter/web/js](https://github.com/rustdesk/rustdesk/tree/master/flutter/web/v1/js)**: JavaScript для Web-клиента Flutter

flutter/lib/models/input_model.dart

@@ -348,6 +348,12 @@ class InputModel {
   final _trackpadAdjustPeerLinux = 0.06;
   // This is an experience value.
   final _trackpadAdjustMacToWin = 2.50;
+  // Ignore directional locking for very small deltas on both axes (including
+  // tiny single-axis movement) to avoid over-filtering near zero.
+  static const double _trackpadAxisNoiseThreshold = 0.2;
+  // Lock to dominant axis only when one axis is clearly stronger.
+  // 1.6 means the dominant axis must be >= 60% larger than the other.
+  static const double _trackpadAxisLockRatio = 1.6;
   int _trackpadSpeed = kDefaultTrackpadSpeed;
   double _trackpadSpeedInner = kDefaultTrackpadSpeed / 100.0;
   var _trackpadScrollUnsent = Offset.zero;
@@ -1172,6 +1178,7 @@ class InputModel {
     if (isMacOS && peerPlatform == kPeerPlatformWindows) {
       delta *= _trackpadAdjustMacToWin;
     }
+    delta = _filterTrackpadDeltaAxis(delta);
     _trackpadLastDelta = delta;
 
     var x = delta.dx.toInt();
@@ -1204,6 +1211,24 @@ class InputModel {
     }
   }
 
+  Offset _filterTrackpadDeltaAxis(Offset delta) {
+    final absDx = delta.dx.abs();
+    final absDy = delta.dy.abs();
+    // Keep diagonal intent when movement is tiny on both axes.
+    if (absDx < _trackpadAxisNoiseThreshold &&
+        absDy < _trackpadAxisNoiseThreshold) {
+      return delta;
+    }
+    // Dominant-axis lock to reduce accidental cross-axis scrolling noise.
+    if (absDy >= absDx * _trackpadAxisLockRatio) {
+      return Offset(0, delta.dy);
+    }
+    if (absDx >= absDy * _trackpadAxisLockRatio) {
+      return Offset(delta.dx, 0);
+    }
+    return delta;
+  }
+
   void _scheduleFling(double x, double y, int delay) {
     if (isViewCamera) return;
     if ((x == 0 && y == 0) || _stopFling) {