refactor: rename zoom commands to use camelCase in API and PTZ control

doc/API.md

@@ -277,8 +277,8 @@ SRS-SIP 是一个基于 GB28181 协议的视频监控系统，提供设备管理
   - `down`: 向下
   - `left`: 向左
   - `right`: 向右
-  - `zoom_in`: 放大
-  - `zoom_out`: 缩小
+  - `zoomin`: 放大
+  - `zoomout`: 缩小
   - `stop`: 停止
 - `speed`: 控制速度（1-9）
 

html/NextGB/src/views/realplay/PtzControlPanel.vue

@@ -162,7 +162,7 @@ const isDisabled = computed(() => !props.activeWindow)
             <el-button
               class="zoom-btn"
               :disabled="isDisabled"
-              @mousedown="handlePtzStart('zoom_in')"
+              @mousedown="handlePtzStart('zoomin')"
               @mouseup="handlePtzStop"
               @mouseleave="handlePtzStop"
             >
@@ -172,7 +172,7 @@ const isDisabled = computed(() => !props.activeWindow)
             <el-button
               class="zoom-btn"
               :disabled="isDisabled"
-              @mousedown="handlePtzStart('zoom_out')"
+              @mousedown="handlePtzStart('zoomout')"
               @mouseup="handlePtzStop"
               @mouseleave="handlePtzStop"
             >

pkg/service/ptz.go

@@ -15,8 +15,6 @@ var (
 		"upleft":    10,
 		"zoomin":    16,
 		"zoomout":   32,
-		"zoom_in":   16,
-		"zoom_out":  32,
 	}
 
 	ptzSpeedMap = map[string]uint8{

pkg/service/ptz_test.go

@@ -159,7 +159,7 @@ func TestPTZCmdMap(t *testing.T) {
 	// 验证所有预定义的命令都存在
 	expectedCommands := []string{
 		"stop", "right", "left", "down", "downright", "downleft",
-		"up", "upright", "upleft", "zoomin", "zoomout", "zoom_in", "zoom_out",
+		"up", "upright", "upleft", "zoomin", "zoomout",
 	}
 
 	for _, cmd := range expectedCommands {