fix: OTA 弹窗进度条修复

1. 进度条宽度用 post{} 延迟设置，确保容器已布局（width>0）
2. 进度回调限频 200ms，避免主线程过载
3. 用 runOnUiThread 替代 launch(Main)，更简单可靠
4. 各状态切换加日志

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/xiaoqu/watch/app/MainActivity.kt

@@ -209,10 +209,13 @@ class MainActivity : AppCompatActivity() {
 
     /** 待下载的更新 URL */
     private var pendingUpdateUrl: String? = null
+    /** 上次进度更新时间（限制频率，避免主线程过载） */
+    private var lastProgressUpdate = 0L
 
     /** 开始下载并安装 APK */
     private fun startDownloadAndInstall() {
         val url = pendingUpdateUrl ?: return
+        Timber.d("OTA: 开始下载安装流程, url=%s", url)
         updateManager.isUpdating = true
         // 保持屏幕常亮
         screenController.turnOn()
@@ -221,19 +224,23 @@ class MainActivity : AppCompatActivity() {
 
         activityScope.launch {
             val file = updateManager.downloadApk(url) { progress, bytes ->
-                // 进度回调在 IO 线程，切回主线程更新 UI
-                launch(kotlinx.coroutines.Dispatchers.Main) {
-                    updateDialog.updateProgress(progress, bytes)
+                // 限制进度更新频率：最多每 200ms 更新一次 UI
+                val now = System.currentTimeMillis()
+                if (now - lastProgressUpdate >= 200 || progress >= 100) {
+                    lastProgressUpdate = now
+                    runOnUiThread {
+                        updateDialog.updateProgress(progress, bytes)
+                    }
                 }
             }
 
             // 回到主线程处理结果
             kotlinx.coroutines.withContext(kotlinx.coroutines.Dispatchers.Main) {
                 if (file != null) {
-                    // 下载成功 → 触发安装
+                    Timber.d("OTA: 下载完成，触发安装")
                     updateManager.installApk(file)
                 } else {
-                    // 下载失败 → 显示错误
+                    Timber.d("OTA: 下载失败")
                     updateManager.isUpdating = false
                     updateDialog.showError()
                 }

app/src/main/java/com/xiaoqu/watch/ui/widget/UpdateDialogView.kt

@@ -7,6 +7,7 @@ import android.view.View
 import android.widget.FrameLayout
 import android.widget.TextView
 import com.xiaoqu.watch.R
+import timber.log.Timber
 
 /**
  * OTA 更新弹窗 View（全屏覆盖）
@@ -59,18 +60,23 @@ class UpdateDialogView @JvmOverloads constructor(
         tvProgress.visibility = View.GONE
         btnAction.visibility = View.VISIBLE
         btnAction.text = "立即更新"
+        Timber.d("OTA弹窗: 显示发现新版本")
     }
 
     /** 显示"下载中"状态 */
     fun showDownloading() {
+        visibility = View.VISIBLE
         tvIcon.text = "\ueb2c"
         tvTitle.text = "请勿关机！"
         tvDesc.visibility = View.VISIBLE
         tvDesc.text = "正在升级系统..."
         progressContainer.visibility = View.VISIBLE
         tvProgress.visibility = View.VISIBLE
+        tvProgress.text = "0%"
         btnAction.visibility = View.GONE
-        updateProgress(0)
+        // 进度条初始归零
+        setProgressPercent(0)
+        Timber.d("OTA弹窗: 显示下载中")
     }
 
     /**
@@ -80,10 +86,7 @@ class UpdateDialogView @JvmOverloads constructor(
      */
     fun updateProgress(percent: Int, downloadedBytes: Long = 0) {
         if (percent >= 0) {
-            // 已知进度：显示百分比
-            val params = progressBar.layoutParams
-            params.width = (progressContainer.width * percent / 100).coerceAtLeast(0)
-            progressBar.layoutParams = params
+            setProgressPercent(percent)
             tvProgress.text = "${percent}%"
         } else {
             // 未知进度：显示已下载大小
@@ -101,10 +104,26 @@ class UpdateDialogView @JvmOverloads constructor(
         tvProgress.visibility = View.GONE
         btnAction.visibility = View.VISIBLE
         btnAction.text = "重新下载"
+        Timber.d("OTA弹窗: 显示错误 %s", message)
     }
 
     /** 隐藏弹窗 */
     fun hide() {
         visibility = View.GONE
     }
+
+    /**
+     * 设置进度条百分比（用 post 确保在布局完成后设置宽度）
+     */
+    private fun setProgressPercent(percent: Int) {
+        progressContainer.post {
+            val containerWidth = progressContainer.width
+            if (containerWidth > 0) {
+                val barWidth = containerWidth * percent / 100
+                val params = progressBar.layoutParams
+                params.width = barWidth
+                progressBar.layoutParams = params
+            }
+        }
+    }
 }