fix: 节点列表长按切换模式，短按不处理

- 添加 onUpPressed/onDownPressed 记录按键时间
- 在 drawDynamicNodeListScreen 中调用 checkLongPress() 检测长按
- 长按(>500ms)切换模式，短按不处理

code/firmware-2.7.15.567b8ea/src/graphics/Screen.cpp

@@ -1597,18 +1597,16 @@ int Screen::handleInputEvent(const InputEvent *event)
             } else if (event->inputEvent == INPUT_BROKER_RIGHT || event->inputEvent == INPUT_BROKER_USER_PRESS) {
                 showNextFrame();
             } else if (event->inputEvent == INPUT_BROKER_UP) {
-                // 在节点列表界面，UP 切换到上一个模式
+                // 在节点列表界面，记录按键按下时间，由渲染函数检测长按
                 if (this->ui->getUiState()->currentFrame == framesetInfo.positions.nodelist) {
-                    graphics::NodeListRenderer::switchToPrevMode();
+                    graphics::NodeListRenderer::onUpPressed();
                     setFastFramerate();
-                    ui->update();
                 }
             } else if (event->inputEvent == INPUT_BROKER_DOWN) {
-                // 在节点列表界面，DOWN 切换到下一个模式
+                // 在节点列表界面，记录按键按下时间，由渲染函数检测长按
                 if (this->ui->getUiState()->currentFrame == framesetInfo.positions.nodelist) {
-                    graphics::NodeListRenderer::switchToNextMode();
+                    graphics::NodeListRenderer::onDownPressed();
                     setFastFramerate();
-                    ui->update();
                 }
             } else if (event->inputEvent == INPUT_BROKER_SELECT) {
                 if (this->ui->getUiState()->currentFrame == framesetInfo.positions.home) {

code/firmware-2.7.15.567b8ea/src/graphics/draw/NodeListRenderer.cpp

@@ -50,6 +50,13 @@ static NodeListMode currentMode = MODE_LAST_HEARD;
 static int scrollIndex = 0;
 static bool autoCycleEnabled = false; // 禁用自动切换，改为手动按键控制
 
+// 长按检测变量
+static unsigned long lastUpPressTime = 0;
+static unsigned long lastDownPressTime = 0;
+static bool upLongPressHandled = false;
+static bool downLongPressHandled = false;
+#define LONG_PRESS_THRESHOLD_MS 500
+
 // =============================
 // Mode Control Functions (manual UP/DOWN control)
 // =============================
@@ -69,6 +76,72 @@ void switchToPrevMode()
     currentMode = static_cast<NodeListMode>((currentMode + MODE_COUNT - 1) % MODE_COUNT);
 }
 
+// 处理 UP 按键（短按滚动，长按切换模式）
+void handleUpKey(bool isLongPress)
+{
+    if (isLongPress) {
+        switchToPrevMode();
+    }
+    // 短按不做任何事（让 Screen.cpp 处理滚动）
+}
+
+// 处理 DOWN 按键（短按滚动，长按切换模式）
+void handleDownKey(bool isLongPress)
+{
+    if (isLongPress) {
+        switchToNextMode();
+    }
+    // 短按不做任何事（让 Screen.cpp 处理滚动）
+}
+
+// 定时器函数，检查长按状态（在 runOnce 中调用）
+void checkLongPress()
+{
+    unsigned long now = millis();
+    
+    // 检查 UP 长按
+    if (lastUpPressTime > 0 && !upLongPressHandled) {
+        if (now - lastUpPressTime > LONG_PRESS_THRESHOLD_MS) {
+            switchToPrevMode();
+            upLongPressHandled = true;
+        }
+    }
+    
+    // 检查 DOWN 长按
+    if (lastDownPressTime > 0 && !downLongPressHandled) {
+        if (now - lastDownPressTime > LONG_PRESS_THRESHOLD_MS) {
+            switchToNextMode();
+            downLongPressHandled = true;
+        }
+    }
+}
+
+// 标记按键按下（从 Screen.cpp 调用）
+void onUpPressed()
+{
+    lastUpPressTime = millis();
+    upLongPressHandled = false;
+}
+
+void onDownPressed()
+{
+    lastDownPressTime = millis();
+    downLongPressHandled = false;
+}
+
+// 标记按键释放（从 Screen.cpp 调用）
+void onUpReleased()
+{
+    lastUpPressTime = 0;
+    upLongPressHandled = false;
+}
+
+void onDownReleased()
+{
+    lastDownPressTime = 0;
+    downLongPressHandled = false;
+}
+
 // =============================
 // Utility Functions
 // =============================
@@ -538,9 +611,19 @@ void drawDynamicNodeListScreen(OLEDDisplay *display, OLEDDisplayUiState *state,
     // Static variables to track mode and duration
     static NodeListMode lastRenderedMode = MODE_COUNT;
     static unsigned long modeStartTime = 0;
+    static NodeListMode previousMode = MODE_COUNT;
 
     unsigned long now = millis();
 
+    // 检查长按并切换模式
+    checkLongPress();
+
+    // 如果模式改变了，强制刷新显示
+    if (previousMode != currentMode) {
+        previousMode = currentMode;
+        // 模式已切换，UI 会自动刷新
+    }
+
 #if defined(M5STACK_UNITC6L)
     display->clear();
     if (now - lastSwitchTime >= 3000) {

code/firmware-2.7.15.567b8ea/src/graphics/draw/NodeListRenderer.h

@@ -59,6 +59,13 @@ void switchToNextMode();
 void switchToPrevMode();
 NodeListMode getCurrentMode();
 
+// Long press detection for UP/DOWN keys
+void onUpPressed();
+void onDownPressed();
+void onUpReleased();
+void onDownReleased();
+void checkLongPress();
+
 // Bitmap drawing function
 void drawScaledXBitmap16x16(int x, int y, int width, int height, const uint8_t *bitmapXBM, OLEDDisplay *display);